Tim Peters | 4fd9e2f | 2001-08-18 00:05:50 +0000 | [diff] [blame] | 1 | # Module doctest. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2 | # Released to the public domain 16-Jan-2001, by Tim Peters (tim@python.org). |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 3 | # Major enhancements and refactoring by: |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 4 | # Jim Fulton |
| 5 | # Edward Loper |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 6 | |
| 7 | # Provided as-is; use at your own risk; no warranty; no promises; enjoy! |
| 8 | |
Martin v. Löwis | 92816de | 2004-05-31 19:01:00 +0000 | [diff] [blame] | 9 | r"""Module doctest -- a framework for running examples in docstrings. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 10 | |
Tim Peters | 80e5314 | 2004-08-09 04:34:45 +0000 | [diff] [blame] | 11 | In simplest use, end each module M to be tested with: |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 12 | |
| 13 | def _test(): |
Tim Peters | 80e5314 | 2004-08-09 04:34:45 +0000 | [diff] [blame] | 14 | import doctest |
Tim Peters | 48983fc | 2004-09-25 02:41:28 +0000 | [diff] [blame] | 15 | doctest.testmod() |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 16 | |
| 17 | if __name__ == "__main__": |
| 18 | _test() |
| 19 | |
| 20 | Then running the module as a script will cause the examples in the |
| 21 | docstrings to get executed and verified: |
| 22 | |
| 23 | python M.py |
| 24 | |
| 25 | This won't display anything unless an example fails, in which case the |
| 26 | failing example(s) and the cause(s) of the failure(s) are printed to stdout |
| 27 | (why not stderr? because stderr is a lame hack <0.2 wink>), and the final |
| 28 | line of output is "Test failed.". |
| 29 | |
| 30 | Run it with the -v switch instead: |
| 31 | |
| 32 | python M.py -v |
| 33 | |
| 34 | and a detailed report of all examples tried is printed to stdout, along |
| 35 | with assorted summaries at the end. |
| 36 | |
Tim Peters | 80e5314 | 2004-08-09 04:34:45 +0000 | [diff] [blame] | 37 | You can force verbose mode by passing "verbose=True" to testmod, or prohibit |
| 38 | it by passing "verbose=False". In either of those cases, sys.argv is not |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 39 | examined by testmod. |
| 40 | |
Tim Peters | 80e5314 | 2004-08-09 04:34:45 +0000 | [diff] [blame] | 41 | There are a variety of other ways to run doctests, including integration |
| 42 | with the unittest framework, and support for running non-Python text |
| 43 | files containing doctests. There are also many ways to override parts |
| 44 | of doctest's default behaviors. See the Library Reference Manual for |
| 45 | details. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 46 | """ |
Tim Peters | 48983fc | 2004-09-25 02:41:28 +0000 | [diff] [blame] | 47 | |
Edward Loper | 8e4a34b | 2004-08-12 02:34:27 +0000 | [diff] [blame] | 48 | __docformat__ = 'reStructuredText en' |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 49 | |
Tim Peters | 4fd9e2f | 2001-08-18 00:05:50 +0000 | [diff] [blame] | 50 | __all__ = [ |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 51 | # 0, Option Flags |
| 52 | 'register_optionflag', |
| 53 | 'DONT_ACCEPT_TRUE_FOR_1', |
| 54 | 'DONT_ACCEPT_BLANKLINE', |
| 55 | 'NORMALIZE_WHITESPACE', |
| 56 | 'ELLIPSIS', |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 57 | 'SKIP', |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 58 | 'IGNORE_EXCEPTION_DETAIL', |
Tim Peters | ba60196 | 2004-09-04 15:04:06 +0000 | [diff] [blame] | 59 | 'COMPARISON_FLAGS', |
Edward Loper | 71f55af | 2004-08-26 01:41:51 +0000 | [diff] [blame] | 60 | 'REPORT_UDIFF', |
| 61 | 'REPORT_CDIFF', |
| 62 | 'REPORT_NDIFF', |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 63 | 'REPORT_ONLY_FIRST_FAILURE', |
Tim Peters | ba60196 | 2004-09-04 15:04:06 +0000 | [diff] [blame] | 64 | 'REPORTING_FLAGS', |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 65 | # 1. Utility Functions |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 66 | # 2. Example & DocTest |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 67 | 'Example', |
| 68 | 'DocTest', |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 69 | # 3. Doctest Parser |
| 70 | 'DocTestParser', |
| 71 | # 4. Doctest Finder |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 72 | 'DocTestFinder', |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 73 | # 5. Doctest Runner |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 74 | 'DocTestRunner', |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 75 | 'OutputChecker', |
| 76 | 'DocTestFailure', |
| 77 | 'UnexpectedException', |
| 78 | 'DebugRunner', |
| 79 | # 6. Test Functions |
Tim Peters | 4fd9e2f | 2001-08-18 00:05:50 +0000 | [diff] [blame] | 80 | 'testmod', |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 81 | 'testfile', |
Tim Peters | 4fd9e2f | 2001-08-18 00:05:50 +0000 | [diff] [blame] | 82 | 'run_docstring_examples', |
Georg Brandl | cc80bfe | 2008-05-12 18:06:23 +0000 | [diff] [blame] | 83 | # 7. Unittest Support |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 84 | 'DocTestSuite', |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 85 | 'DocFileSuite', |
Tim Peters | 9d02a7c | 2004-09-26 01:50:24 +0000 | [diff] [blame] | 86 | 'set_unittest_reportflags', |
Georg Brandl | cc80bfe | 2008-05-12 18:06:23 +0000 | [diff] [blame] | 87 | # 8. Debugging Support |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 88 | 'script_from_examples', |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 89 | 'testsource', |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 90 | 'debug_src', |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 91 | 'debug', |
Tim Peters | 4fd9e2f | 2001-08-18 00:05:50 +0000 | [diff] [blame] | 92 | ] |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 93 | |
Tim Peters | 4fd9e2f | 2001-08-18 00:05:50 +0000 | [diff] [blame] | 94 | import __future__ |
Victor Stinner | 12b8d14 | 2011-06-30 17:35:55 +0200 | [diff] [blame] | 95 | import difflib |
| 96 | import inspect |
| 97 | import linecache |
| 98 | import os |
| 99 | import pdb |
| 100 | import re |
| 101 | import sys |
| 102 | import traceback |
| 103 | import unittest |
Guido van Rossum | 34d1928 | 2007-08-09 01:03:29 +0000 | [diff] [blame] | 104 | from io import StringIO |
Christian Heimes | 25bb783 | 2008-01-11 16:17:00 +0000 | [diff] [blame] | 105 | from collections import namedtuple |
| 106 | |
| 107 | TestResults = namedtuple('TestResults', 'failed attempted') |
Tim Peters | 7402f79 | 2001-10-02 03:53:41 +0000 | [diff] [blame] | 108 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 109 | # There are 4 basic classes: |
| 110 | # - Example: a <source, want> pair, plus an intra-docstring line number. |
| 111 | # - DocTest: a collection of examples, parsed from a docstring, plus |
| 112 | # info about where the docstring came from (name, filename, lineno). |
| 113 | # - DocTestFinder: extracts DocTests from a given object's docstring and |
| 114 | # its contained objects' docstrings. |
| 115 | # - DocTestRunner: runs DocTest cases, and accumulates statistics. |
| 116 | # |
| 117 | # So the basic picture is: |
| 118 | # |
| 119 | # list of: |
| 120 | # +------+ +---------+ +-------+ |
| 121 | # |object| --DocTestFinder-> | DocTest | --DocTestRunner-> |results| |
| 122 | # +------+ +---------+ +-------+ |
| 123 | # | Example | |
| 124 | # | ... | |
| 125 | # | Example | |
| 126 | # +---------+ |
| 127 | |
Edward Loper | ac20f57 | 2004-08-12 02:02:24 +0000 | [diff] [blame] | 128 | # Option constants. |
Tim Peters | 38330fe | 2004-08-30 16:19:24 +0000 | [diff] [blame] | 129 | |
Edward Loper | ac20f57 | 2004-08-12 02:02:24 +0000 | [diff] [blame] | 130 | OPTIONFLAGS_BY_NAME = {} |
| 131 | def register_optionflag(name): |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 132 | # Create a new flag unless `name` is already known. |
| 133 | return OPTIONFLAGS_BY_NAME.setdefault(name, 1 << len(OPTIONFLAGS_BY_NAME)) |
Edward Loper | ac20f57 | 2004-08-12 02:02:24 +0000 | [diff] [blame] | 134 | |
| 135 | DONT_ACCEPT_TRUE_FOR_1 = register_optionflag('DONT_ACCEPT_TRUE_FOR_1') |
| 136 | DONT_ACCEPT_BLANKLINE = register_optionflag('DONT_ACCEPT_BLANKLINE') |
| 137 | NORMALIZE_WHITESPACE = register_optionflag('NORMALIZE_WHITESPACE') |
| 138 | ELLIPSIS = register_optionflag('ELLIPSIS') |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 139 | SKIP = register_optionflag('SKIP') |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 140 | IGNORE_EXCEPTION_DETAIL = register_optionflag('IGNORE_EXCEPTION_DETAIL') |
Tim Peters | 38330fe | 2004-08-30 16:19:24 +0000 | [diff] [blame] | 141 | |
| 142 | COMPARISON_FLAGS = (DONT_ACCEPT_TRUE_FOR_1 | |
| 143 | DONT_ACCEPT_BLANKLINE | |
| 144 | NORMALIZE_WHITESPACE | |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 145 | ELLIPSIS | |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 146 | SKIP | |
Edward Loper | 7d88a58 | 2004-09-28 05:50:57 +0000 | [diff] [blame] | 147 | IGNORE_EXCEPTION_DETAIL) |
Tim Peters | 38330fe | 2004-08-30 16:19:24 +0000 | [diff] [blame] | 148 | |
Edward Loper | 71f55af | 2004-08-26 01:41:51 +0000 | [diff] [blame] | 149 | REPORT_UDIFF = register_optionflag('REPORT_UDIFF') |
| 150 | REPORT_CDIFF = register_optionflag('REPORT_CDIFF') |
| 151 | REPORT_NDIFF = register_optionflag('REPORT_NDIFF') |
Edward Loper | a89f88d | 2004-08-26 02:45:51 +0000 | [diff] [blame] | 152 | REPORT_ONLY_FIRST_FAILURE = register_optionflag('REPORT_ONLY_FIRST_FAILURE') |
Edward Loper | ac20f57 | 2004-08-12 02:02:24 +0000 | [diff] [blame] | 153 | |
Tim Peters | 38330fe | 2004-08-30 16:19:24 +0000 | [diff] [blame] | 154 | REPORTING_FLAGS = (REPORT_UDIFF | |
| 155 | REPORT_CDIFF | |
| 156 | REPORT_NDIFF | |
| 157 | REPORT_ONLY_FIRST_FAILURE) |
| 158 | |
Edward Loper | ac20f57 | 2004-08-12 02:02:24 +0000 | [diff] [blame] | 159 | # Special string markers for use in `want` strings: |
| 160 | BLANKLINE_MARKER = '<BLANKLINE>' |
| 161 | ELLIPSIS_MARKER = '...' |
| 162 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 163 | ###################################################################### |
| 164 | ## Table of Contents |
| 165 | ###################################################################### |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 166 | # 1. Utility Functions |
| 167 | # 2. Example & DocTest -- store test cases |
| 168 | # 3. DocTest Parser -- extracts examples from strings |
| 169 | # 4. DocTest Finder -- extracts test cases from objects |
| 170 | # 5. DocTest Runner -- runs test cases |
| 171 | # 6. Test Functions -- convenient wrappers for testing |
Georg Brandl | 3183585 | 2008-05-12 17:38:56 +0000 | [diff] [blame] | 172 | # 7. Unittest Support |
| 173 | # 8. Debugging Support |
| 174 | # 9. Example Usage |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 175 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 176 | ###################################################################### |
| 177 | ## 1. Utility Functions |
| 178 | ###################################################################### |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 179 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 180 | def _extract_future_flags(globs): |
| 181 | """ |
| 182 | Return the compiler-flags associated with the future features that |
| 183 | have been imported into the given namespace (globs). |
| 184 | """ |
| 185 | flags = 0 |
| 186 | for fname in __future__.all_feature_names: |
| 187 | feature = globs.get(fname, None) |
| 188 | if feature is getattr(__future__, fname): |
| 189 | flags |= feature.compiler_flag |
| 190 | return flags |
Tim Peters | 7402f79 | 2001-10-02 03:53:41 +0000 | [diff] [blame] | 191 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 192 | def _normalize_module(module, depth=2): |
| 193 | """ |
| 194 | Return the module specified by `module`. In particular: |
| 195 | - If `module` is a module, then return module. |
| 196 | - If `module` is a string, then import and return the |
| 197 | module with that name. |
| 198 | - If `module` is None, then return the calling module. |
| 199 | The calling module is assumed to be the module of |
| 200 | the stack frame at the given depth in the call stack. |
| 201 | """ |
| 202 | if inspect.ismodule(module): |
| 203 | return module |
Walter Dörwald | aa97f04 | 2007-05-03 21:05:51 +0000 | [diff] [blame] | 204 | elif isinstance(module, str): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 205 | return __import__(module, globals(), locals(), ["*"]) |
| 206 | elif module is None: |
| 207 | return sys.modules[sys._getframe(depth).f_globals['__name__']] |
| 208 | else: |
| 209 | raise TypeError("Expected a module, string, or None") |
Tim Peters | 7402f79 | 2001-10-02 03:53:41 +0000 | [diff] [blame] | 210 | |
Guido van Rossum | 1b81e7b | 2007-08-29 03:53:53 +0000 | [diff] [blame] | 211 | def _load_testfile(filename, package, module_relative, encoding): |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 212 | if module_relative: |
| 213 | package = _normalize_module(package, 3) |
| 214 | filename = _module_relative_path(package, filename) |
| 215 | if hasattr(package, '__loader__'): |
| 216 | if hasattr(package.__loader__, 'get_data'): |
Guido van Rossum | cd4d452 | 2007-11-22 00:30:02 +0000 | [diff] [blame] | 217 | file_contents = package.__loader__.get_data(filename) |
| 218 | file_contents = file_contents.decode(encoding) |
| 219 | # get_data() opens files as 'rb', so one must do the equivalent |
| 220 | # conversion as universal newlines would do. |
| 221 | return file_contents.replace(os.linesep, '\n'), filename |
Antoine Pitrou | 92f60ed | 2010-10-14 22:11:44 +0000 | [diff] [blame] | 222 | with open(filename, encoding=encoding) as f: |
| 223 | return f.read(), filename |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 224 | |
Edward Loper | aacf083 | 2004-08-26 01:19:50 +0000 | [diff] [blame] | 225 | def _indent(s, indent=4): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 226 | """ |
Florent Xicluna | 5925085 | 2010-02-27 14:21:57 +0000 | [diff] [blame] | 227 | Add the given number of space characters to the beginning of |
| 228 | every non-blank line in `s`, and return the result. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 229 | """ |
Edward Loper | aacf083 | 2004-08-26 01:19:50 +0000 | [diff] [blame] | 230 | # This regexp matches the start of non-blank lines: |
| 231 | return re.sub('(?m)^(?!$)', indent*' ', s) |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 232 | |
Edward Loper | 8e4a34b | 2004-08-12 02:34:27 +0000 | [diff] [blame] | 233 | def _exception_traceback(exc_info): |
| 234 | """ |
| 235 | Return a string containing a traceback message for the given |
| 236 | exc_info tuple (as returned by sys.exc_info()). |
| 237 | """ |
| 238 | # Get a traceback message. |
| 239 | excout = StringIO() |
| 240 | exc_type, exc_val, exc_tb = exc_info |
| 241 | traceback.print_exception(exc_type, exc_val, exc_tb, file=excout) |
| 242 | return excout.getvalue() |
| 243 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 244 | # Override some StringIO methods. |
| 245 | class _SpoofOut(StringIO): |
| 246 | def getvalue(self): |
| 247 | result = StringIO.getvalue(self) |
| 248 | # If anything at all was written, make sure there's a trailing |
| 249 | # newline. There's no way for the expected output to indicate |
| 250 | # that a trailing newline is missing. |
| 251 | if result and not result.endswith("\n"): |
| 252 | result += "\n" |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 253 | return result |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 254 | |
Guido van Rossum | 79139b2 | 2007-02-09 23:20:19 +0000 | [diff] [blame] | 255 | def truncate(self, size=None): |
Antoine Pitrou | b3d7700 | 2010-01-31 23:12:29 +0000 | [diff] [blame] | 256 | self.seek(size) |
| 257 | StringIO.truncate(self) |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 258 | |
Tim Peters | 26b3ebb | 2004-08-19 08:10:08 +0000 | [diff] [blame] | 259 | # Worst-case linear-time ellipsis matching. |
Tim Peters | b0a04e1 | 2004-08-20 02:08:04 +0000 | [diff] [blame] | 260 | def _ellipsis_match(want, got): |
Tim Peters | dc5de3b | 2004-08-19 14:06:20 +0000 | [diff] [blame] | 261 | """ |
| 262 | Essentially the only subtle case: |
Tim Peters | b0a04e1 | 2004-08-20 02:08:04 +0000 | [diff] [blame] | 263 | >>> _ellipsis_match('aa...aa', 'aaa') |
Tim Peters | dc5de3b | 2004-08-19 14:06:20 +0000 | [diff] [blame] | 264 | False |
| 265 | """ |
Tim Peters | 26b3ebb | 2004-08-19 08:10:08 +0000 | [diff] [blame] | 266 | if ELLIPSIS_MARKER not in want: |
| 267 | return want == got |
Tim Peters | dc5de3b | 2004-08-19 14:06:20 +0000 | [diff] [blame] | 268 | |
Tim Peters | 26b3ebb | 2004-08-19 08:10:08 +0000 | [diff] [blame] | 269 | # Find "the real" strings. |
| 270 | ws = want.split(ELLIPSIS_MARKER) |
| 271 | assert len(ws) >= 2 |
Tim Peters | 26b3ebb | 2004-08-19 08:10:08 +0000 | [diff] [blame] | 272 | |
Tim Peters | dc5de3b | 2004-08-19 14:06:20 +0000 | [diff] [blame] | 273 | # Deal with exact matches possibly needed at one or both ends. |
| 274 | startpos, endpos = 0, len(got) |
| 275 | w = ws[0] |
| 276 | if w: # starts with exact match |
| 277 | if got.startswith(w): |
| 278 | startpos = len(w) |
| 279 | del ws[0] |
| 280 | else: |
| 281 | return False |
| 282 | w = ws[-1] |
| 283 | if w: # ends with exact match |
| 284 | if got.endswith(w): |
| 285 | endpos -= len(w) |
| 286 | del ws[-1] |
| 287 | else: |
| 288 | return False |
| 289 | |
| 290 | if startpos > endpos: |
| 291 | # Exact end matches required more characters than we have, as in |
Tim Peters | b0a04e1 | 2004-08-20 02:08:04 +0000 | [diff] [blame] | 292 | # _ellipsis_match('aa...aa', 'aaa') |
Tim Peters | dc5de3b | 2004-08-19 14:06:20 +0000 | [diff] [blame] | 293 | return False |
| 294 | |
| 295 | # For the rest, we only need to find the leftmost non-overlapping |
| 296 | # match for each piece. If there's no overall match that way alone, |
| 297 | # there's no overall match period. |
Tim Peters | 26b3ebb | 2004-08-19 08:10:08 +0000 | [diff] [blame] | 298 | for w in ws: |
| 299 | # w may be '' at times, if there are consecutive ellipses, or |
| 300 | # due to an ellipsis at the start or end of `want`. That's OK. |
Tim Peters | dc5de3b | 2004-08-19 14:06:20 +0000 | [diff] [blame] | 301 | # Search for an empty string succeeds, and doesn't change startpos. |
| 302 | startpos = got.find(w, startpos, endpos) |
| 303 | if startpos < 0: |
Tim Peters | 26b3ebb | 2004-08-19 08:10:08 +0000 | [diff] [blame] | 304 | return False |
Tim Peters | dc5de3b | 2004-08-19 14:06:20 +0000 | [diff] [blame] | 305 | startpos += len(w) |
Tim Peters | 26b3ebb | 2004-08-19 08:10:08 +0000 | [diff] [blame] | 306 | |
Tim Peters | dc5de3b | 2004-08-19 14:06:20 +0000 | [diff] [blame] | 307 | return True |
Tim Peters | 26b3ebb | 2004-08-19 08:10:08 +0000 | [diff] [blame] | 308 | |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 309 | def _comment_line(line): |
| 310 | "Return a commented form of the given line" |
| 311 | line = line.rstrip() |
| 312 | if line: |
| 313 | return '# '+line |
| 314 | else: |
| 315 | return '#' |
| 316 | |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 317 | class _OutputRedirectingPdb(pdb.Pdb): |
| 318 | """ |
| 319 | A specialized version of the python debugger that redirects stdout |
| 320 | to a given stream when interacting with the user. Stdout is *not* |
| 321 | redirected when traced code is executed. |
| 322 | """ |
| 323 | def __init__(self, out): |
| 324 | self.__out = out |
Guido van Rossum | 0d3fb8a | 2007-11-26 23:23:18 +0000 | [diff] [blame] | 325 | self.__debugger_used = False |
Georg Brandl | 34748cd | 2010-12-04 17:11:36 +0000 | [diff] [blame] | 326 | # do not play signal games in the pdb |
| 327 | pdb.Pdb.__init__(self, stdout=out, nosigint=True) |
Georg Brandl | d72e043 | 2010-07-30 09:59:28 +0000 | [diff] [blame] | 328 | # still use input() to get user input |
| 329 | self.use_rawinput = 1 |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 330 | |
Guido van Rossum | 0d3fb8a | 2007-11-26 23:23:18 +0000 | [diff] [blame] | 331 | def set_trace(self, frame=None): |
| 332 | self.__debugger_used = True |
| 333 | if frame is None: |
| 334 | frame = sys._getframe().f_back |
| 335 | pdb.Pdb.set_trace(self, frame) |
| 336 | |
| 337 | def set_continue(self): |
| 338 | # Calling set_continue unconditionally would break unit test |
| 339 | # coverage reporting, as Bdb.set_continue calls sys.settrace(None). |
| 340 | if self.__debugger_used: |
| 341 | pdb.Pdb.set_continue(self) |
| 342 | |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 343 | def trace_dispatch(self, *args): |
| 344 | # Redirect stdout to the given stream. |
| 345 | save_stdout = sys.stdout |
| 346 | sys.stdout = self.__out |
| 347 | # Call Pdb's trace dispatch method. |
Tim Peters | d7bbbbc | 2004-11-08 22:30:28 +0000 | [diff] [blame] | 348 | try: |
| 349 | return pdb.Pdb.trace_dispatch(self, *args) |
| 350 | finally: |
Tim Peters | d7bbbbc | 2004-11-08 22:30:28 +0000 | [diff] [blame] | 351 | sys.stdout = save_stdout |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 352 | |
Edward Loper | a2fc7ec | 2004-09-21 03:24:24 +0000 | [diff] [blame] | 353 | # [XX] Normalize with respect to os.path.pardir? |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 354 | def _module_relative_path(module, path): |
| 355 | if not inspect.ismodule(module): |
Collin Winter | ce36ad8 | 2007-08-30 01:19:48 +0000 | [diff] [blame] | 356 | raise TypeError('Expected a module: %r' % module) |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 357 | if path.startswith('/'): |
Collin Winter | ce36ad8 | 2007-08-30 01:19:48 +0000 | [diff] [blame] | 358 | raise ValueError('Module-relative files may not have absolute paths') |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 359 | |
| 360 | # Find the base directory for the path. |
| 361 | if hasattr(module, '__file__'): |
| 362 | # A normal module/package |
| 363 | basedir = os.path.split(module.__file__)[0] |
| 364 | elif module.__name__ == '__main__': |
| 365 | # An interactive session. |
| 366 | if len(sys.argv)>0 and sys.argv[0] != '': |
| 367 | basedir = os.path.split(sys.argv[0])[0] |
| 368 | else: |
| 369 | basedir = os.curdir |
| 370 | else: |
| 371 | # A module w/o __file__ (this includes builtins) |
| 372 | raise ValueError("Can't resolve paths relative to the module " + |
| 373 | module + " (it has no __file__)") |
| 374 | |
| 375 | # Combine the base directory and the path. |
| 376 | return os.path.join(basedir, *(path.split('/'))) |
| 377 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 378 | ###################################################################### |
| 379 | ## 2. Example & DocTest |
| 380 | ###################################################################### |
| 381 | ## - An "example" is a <source, want> pair, where "source" is a |
| 382 | ## fragment of source code, and "want" is the expected output for |
| 383 | ## "source." The Example class also includes information about |
| 384 | ## where the example was extracted from. |
| 385 | ## |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 386 | ## - A "doctest" is a collection of examples, typically extracted from |
| 387 | ## a string (such as an object's docstring). The DocTest class also |
| 388 | ## includes information about where the string was extracted from. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 389 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 390 | class Example: |
| 391 | """ |
| 392 | A single doctest example, consisting of source code and expected |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 393 | output. `Example` defines the following attributes: |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 394 | |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 395 | - source: A single Python statement, always ending with a newline. |
Tim Peters | bb43147 | 2004-08-09 03:51:46 +0000 | [diff] [blame] | 396 | The constructor adds a newline if needed. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 397 | |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 398 | - want: The expected output from running the source code (either |
Tim Peters | bb43147 | 2004-08-09 03:51:46 +0000 | [diff] [blame] | 399 | from stdout, or a traceback in case of exception). `want` ends |
| 400 | with a newline unless it's empty, in which case it's an empty |
| 401 | string. The constructor adds a newline if needed. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 402 | |
Edward Loper | a6b6832 | 2004-08-26 00:05:43 +0000 | [diff] [blame] | 403 | - exc_msg: The exception message generated by the example, if |
| 404 | the example is expected to generate an exception; or `None` if |
| 405 | it is not expected to generate an exception. This exception |
| 406 | message is compared against the return value of |
| 407 | `traceback.format_exception_only()`. `exc_msg` ends with a |
| 408 | newline unless it's `None`. The constructor adds a newline |
| 409 | if needed. |
| 410 | |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 411 | - lineno: The line number within the DocTest string containing |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 412 | this Example where the Example begins. This line number is |
| 413 | zero-based, with respect to the beginning of the DocTest. |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 414 | |
| 415 | - indent: The example's indentation in the DocTest string. |
| 416 | I.e., the number of space characters that preceed the |
| 417 | example's first prompt. |
| 418 | |
| 419 | - options: A dictionary mapping from option flags to True or |
| 420 | False, which is used to override default options for this |
| 421 | example. Any option flags not contained in this dictionary |
| 422 | are left at their default value (as specified by the |
| 423 | DocTestRunner's optionflags). By default, no options are set. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 424 | """ |
Edward Loper | a6b6832 | 2004-08-26 00:05:43 +0000 | [diff] [blame] | 425 | def __init__(self, source, want, exc_msg=None, lineno=0, indent=0, |
| 426 | options=None): |
Tim Peters | bb43147 | 2004-08-09 03:51:46 +0000 | [diff] [blame] | 427 | # Normalize inputs. |
| 428 | if not source.endswith('\n'): |
| 429 | source += '\n' |
| 430 | if want and not want.endswith('\n'): |
| 431 | want += '\n' |
Edward Loper | a6b6832 | 2004-08-26 00:05:43 +0000 | [diff] [blame] | 432 | if exc_msg is not None and not exc_msg.endswith('\n'): |
| 433 | exc_msg += '\n' |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 434 | # Store properties. |
| 435 | self.source = source |
| 436 | self.want = want |
| 437 | self.lineno = lineno |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 438 | self.indent = indent |
| 439 | if options is None: options = {} |
| 440 | self.options = options |
Edward Loper | a6b6832 | 2004-08-26 00:05:43 +0000 | [diff] [blame] | 441 | self.exc_msg = exc_msg |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 442 | |
Antoine Pitrou | 2bc801c | 2011-12-18 19:27:45 +0100 | [diff] [blame] | 443 | def __eq__(self, other): |
| 444 | if type(self) is not type(other): |
| 445 | return NotImplemented |
| 446 | |
| 447 | return self.source == other.source and \ |
| 448 | self.want == other.want and \ |
| 449 | self.lineno == other.lineno and \ |
| 450 | self.indent == other.indent and \ |
| 451 | self.options == other.options and \ |
| 452 | self.exc_msg == other.exc_msg |
| 453 | |
| 454 | def __ne__(self, other): |
| 455 | return not self == other |
| 456 | |
Antoine Pitrou | 165b128 | 2011-12-18 20:20:17 +0100 | [diff] [blame] | 457 | def __hash__(self): |
| 458 | return hash((self.source, self.want, self.lineno, self.indent, |
| 459 | self.exc_msg)) |
Antoine Pitrou | 2bc801c | 2011-12-18 19:27:45 +0100 | [diff] [blame] | 460 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 461 | class DocTest: |
| 462 | """ |
| 463 | A collection of doctest examples that should be run in a single |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 464 | namespace. Each `DocTest` defines the following attributes: |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 465 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 466 | - examples: the list of examples. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 467 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 468 | - globs: The namespace (aka globals) that the examples should |
| 469 | be run in. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 470 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 471 | - name: A name identifying the DocTest (typically, the name of |
| 472 | the object whose docstring this DocTest was extracted from). |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 473 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 474 | - filename: The name of the file that this DocTest was extracted |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 475 | from, or `None` if the filename is unknown. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 476 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 477 | - lineno: The line number within filename where this DocTest |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 478 | begins, or `None` if the line number is unavailable. This |
| 479 | line number is zero-based, with respect to the beginning of |
| 480 | the file. |
| 481 | |
| 482 | - docstring: The string that the examples were extracted from, |
| 483 | or `None` if the string is unavailable. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 484 | """ |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 485 | def __init__(self, examples, globs, name, filename, lineno, docstring): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 486 | """ |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 487 | Create a new DocTest containing the given examples. The |
| 488 | DocTest's globals are initialized with a copy of `globs`. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 489 | """ |
Guido van Rossum | 3172c5d | 2007-10-16 18:12:55 +0000 | [diff] [blame] | 490 | assert not isinstance(examples, str), \ |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 491 | "DocTest no longer accepts str; use DocTestParser instead" |
| 492 | self.examples = examples |
| 493 | self.docstring = docstring |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 494 | self.globs = globs.copy() |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 495 | self.name = name |
| 496 | self.filename = filename |
| 497 | self.lineno = lineno |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 498 | |
| 499 | def __repr__(self): |
| 500 | if len(self.examples) == 0: |
| 501 | examples = 'no examples' |
| 502 | elif len(self.examples) == 1: |
| 503 | examples = '1 example' |
| 504 | else: |
| 505 | examples = '%d examples' % len(self.examples) |
| 506 | return ('<DocTest %s from %s:%s (%s)>' % |
| 507 | (self.name, self.filename, self.lineno, examples)) |
| 508 | |
Antoine Pitrou | 2bc801c | 2011-12-18 19:27:45 +0100 | [diff] [blame] | 509 | def __eq__(self, other): |
| 510 | if type(self) is not type(other): |
| 511 | return NotImplemented |
| 512 | |
| 513 | return self.examples == other.examples and \ |
| 514 | self.docstring == other.docstring and \ |
| 515 | self.globs == other.globs and \ |
| 516 | self.name == other.name and \ |
| 517 | self.filename == other.filename and \ |
| 518 | self.lineno == other.lineno |
| 519 | |
| 520 | def __ne__(self, other): |
| 521 | return not self == other |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 522 | |
Antoine Pitrou | 165b128 | 2011-12-18 20:20:17 +0100 | [diff] [blame] | 523 | def __hash__(self): |
| 524 | return hash((self.docstring, self.name, self.filename, self.lineno)) |
| 525 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 526 | # This lets us sort tests by name: |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 527 | def __lt__(self, other): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 528 | if not isinstance(other, DocTest): |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 529 | return NotImplemented |
| 530 | return ((self.name, self.filename, self.lineno, id(self)) |
| 531 | < |
| 532 | (other.name, other.filename, other.lineno, id(other))) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 533 | |
| 534 | ###################################################################### |
Edward Loper | b7503ff | 2004-08-19 19:19:03 +0000 | [diff] [blame] | 535 | ## 3. DocTestParser |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 536 | ###################################################################### |
| 537 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 538 | class DocTestParser: |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 539 | """ |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 540 | A class used to parse strings containing doctest examples. |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 541 | """ |
Edward Loper | 8e4a34b | 2004-08-12 02:34:27 +0000 | [diff] [blame] | 542 | # This regular expression is used to find doctest examples in a |
| 543 | # string. It defines three groups: `source` is the source code |
| 544 | # (including leading indentation and prompts); `indent` is the |
| 545 | # indentation of the first (PS1) line of the source code; and |
| 546 | # `want` is the expected output (including leading indentation). |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 547 | _EXAMPLE_RE = re.compile(r''' |
Tim Peters | d40a92b | 2004-08-09 03:28:45 +0000 | [diff] [blame] | 548 | # Source consists of a PS1 line followed by zero or more PS2 lines. |
| 549 | (?P<source> |
| 550 | (?:^(?P<indent> [ ]*) >>> .*) # PS1 line |
| 551 | (?:\n [ ]* \.\.\. .*)*) # PS2 lines |
| 552 | \n? |
| 553 | # Want consists of any non-blank lines that do not start with PS1. |
| 554 | (?P<want> (?:(?![ ]*$) # Not a blank line |
| 555 | (?![ ]*>>>) # Not a line starting with PS1 |
| 556 | .*$\n? # But any other line |
| 557 | )*) |
| 558 | ''', re.MULTILINE | re.VERBOSE) |
Edward Loper | 8e4a34b | 2004-08-12 02:34:27 +0000 | [diff] [blame] | 559 | |
Edward Loper | a6b6832 | 2004-08-26 00:05:43 +0000 | [diff] [blame] | 560 | # A regular expression for handling `want` strings that contain |
| 561 | # expected exceptions. It divides `want` into three pieces: |
| 562 | # - the traceback header line (`hdr`) |
| 563 | # - the traceback stack (`stack`) |
| 564 | # - the exception message (`msg`), as generated by |
| 565 | # traceback.format_exception_only() |
| 566 | # `msg` may have multiple lines. We assume/require that the |
| 567 | # exception message is the first non-indented line starting with a word |
| 568 | # character following the traceback header line. |
| 569 | _EXCEPTION_RE = re.compile(r""" |
| 570 | # Grab the traceback header. Different versions of Python have |
| 571 | # said different things on the first traceback line. |
| 572 | ^(?P<hdr> Traceback\ \( |
| 573 | (?: most\ recent\ call\ last |
| 574 | | innermost\ last |
| 575 | ) \) : |
| 576 | ) |
| 577 | \s* $ # toss trailing whitespace on the header. |
| 578 | (?P<stack> .*?) # don't blink: absorb stuff until... |
| 579 | ^ (?P<msg> \w+ .*) # a line *starts* with alphanum. |
| 580 | """, re.VERBOSE | re.MULTILINE | re.DOTALL) |
| 581 | |
Tim Peters | 7ea48dd | 2004-08-13 01:52:59 +0000 | [diff] [blame] | 582 | # A callable returning a true value iff its argument is a blank line |
| 583 | # or contains a single comment. |
Edward Loper | 8e4a34b | 2004-08-12 02:34:27 +0000 | [diff] [blame] | 584 | _IS_BLANK_OR_COMMENT = re.compile(r'^[ ]*(#.*)?$').match |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 585 | |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 586 | def parse(self, string, name='<string>'): |
| 587 | """ |
| 588 | Divide the given string into examples and intervening text, |
| 589 | and return them as a list of alternating Examples and strings. |
| 590 | Line numbers for the Examples are 0-based. The optional |
| 591 | argument `name` is a name identifying this string, and is only |
| 592 | used for error messages. |
| 593 | """ |
| 594 | string = string.expandtabs() |
| 595 | # If all lines begin with the same indentation, then strip it. |
| 596 | min_indent = self._min_indent(string) |
| 597 | if min_indent > 0: |
| 598 | string = '\n'.join([l[min_indent:] for l in string.split('\n')]) |
| 599 | |
| 600 | output = [] |
| 601 | charno, lineno = 0, 0 |
| 602 | # Find all doctest examples in the string: |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 603 | for m in self._EXAMPLE_RE.finditer(string): |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 604 | # Add the pre-example text to `output`. |
| 605 | output.append(string[charno:m.start()]) |
| 606 | # Update lineno (lines before this example) |
| 607 | lineno += string.count('\n', charno, m.start()) |
| 608 | # Extract info from the regexp match. |
| 609 | (source, options, want, exc_msg) = \ |
| 610 | self._parse_example(m, name, lineno) |
| 611 | # Create an Example, and add it to the list. |
| 612 | if not self._IS_BLANK_OR_COMMENT(source): |
| 613 | output.append( Example(source, want, exc_msg, |
| 614 | lineno=lineno, |
| 615 | indent=min_indent+len(m.group('indent')), |
| 616 | options=options) ) |
| 617 | # Update lineno (lines inside this example) |
| 618 | lineno += string.count('\n', m.start(), m.end()) |
| 619 | # Update charno. |
| 620 | charno = m.end() |
| 621 | # Add any remaining post-example text to `output`. |
| 622 | output.append(string[charno:]) |
| 623 | return output |
| 624 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 625 | def get_doctest(self, string, globs, name, filename, lineno): |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 626 | """ |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 627 | Extract all doctest examples from the given string, and |
| 628 | collect them into a `DocTest` object. |
| 629 | |
| 630 | `globs`, `name`, `filename`, and `lineno` are attributes for |
| 631 | the new `DocTest` object. See the documentation for `DocTest` |
| 632 | for more information. |
| 633 | """ |
| 634 | return DocTest(self.get_examples(string, name), globs, |
| 635 | name, filename, lineno, string) |
| 636 | |
| 637 | def get_examples(self, string, name='<string>'): |
| 638 | """ |
| 639 | Extract all doctest examples from the given string, and return |
| 640 | them as a list of `Example` objects. Line numbers are |
| 641 | 0-based, because it's most common in doctests that nothing |
| 642 | interesting appears on the same line as opening triple-quote, |
| 643 | and so the first interesting line is called \"line 1\" then. |
| 644 | |
| 645 | The optional argument `name` is a name identifying this |
| 646 | string, and is only used for error messages. |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 647 | """ |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 648 | return [x for x in self.parse(string, name) |
| 649 | if isinstance(x, Example)] |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 650 | |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 651 | def _parse_example(self, m, name, lineno): |
| 652 | """ |
| 653 | Given a regular expression match from `_EXAMPLE_RE` (`m`), |
| 654 | return a pair `(source, want)`, where `source` is the matched |
| 655 | example's source code (with prompts and indentation stripped); |
| 656 | and `want` is the example's expected output (with indentation |
| 657 | stripped). |
| 658 | |
| 659 | `name` is the string's name, and `lineno` is the line number |
| 660 | where the example starts; both are used for error messages. |
| 661 | """ |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 662 | # Get the example's indentation level. |
| 663 | indent = len(m.group('indent')) |
| 664 | |
| 665 | # Divide source into lines; check that they're properly |
| 666 | # indented; and then strip their indentation & prompts. |
| 667 | source_lines = m.group('source').split('\n') |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 668 | self._check_prompt_blank(source_lines, indent, name, lineno) |
Tim Peters | c504915 | 2004-08-22 17:34:58 +0000 | [diff] [blame] | 669 | self._check_prefix(source_lines[1:], ' '*indent + '.', name, lineno) |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 670 | source = '\n'.join([sl[indent+4:] for sl in source_lines]) |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 671 | |
Tim Peters | c504915 | 2004-08-22 17:34:58 +0000 | [diff] [blame] | 672 | # Divide want into lines; check that it's properly indented; and |
| 673 | # then strip the indentation. Spaces before the last newline should |
| 674 | # be preserved, so plain rstrip() isn't good enough. |
Jim Fulton | 07a349c | 2004-08-22 14:10:00 +0000 | [diff] [blame] | 675 | want = m.group('want') |
Jim Fulton | 07a349c | 2004-08-22 14:10:00 +0000 | [diff] [blame] | 676 | want_lines = want.split('\n') |
Tim Peters | c504915 | 2004-08-22 17:34:58 +0000 | [diff] [blame] | 677 | if len(want_lines) > 1 and re.match(r' *$', want_lines[-1]): |
| 678 | del want_lines[-1] # forget final newline & spaces after it |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 679 | self._check_prefix(want_lines, ' '*indent, name, |
Tim Peters | c504915 | 2004-08-22 17:34:58 +0000 | [diff] [blame] | 680 | lineno + len(source_lines)) |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 681 | want = '\n'.join([wl[indent:] for wl in want_lines]) |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 682 | |
Edward Loper | a6b6832 | 2004-08-26 00:05:43 +0000 | [diff] [blame] | 683 | # If `want` contains a traceback message, then extract it. |
| 684 | m = self._EXCEPTION_RE.match(want) |
| 685 | if m: |
| 686 | exc_msg = m.group('msg') |
| 687 | else: |
| 688 | exc_msg = None |
| 689 | |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 690 | # Extract options from the source. |
| 691 | options = self._find_options(source, name, lineno) |
| 692 | |
| 693 | return source, options, want, exc_msg |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 694 | |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 695 | # This regular expression looks for option directives in the |
| 696 | # source code of an example. Option directives are comments |
| 697 | # starting with "doctest:". Warning: this may give false |
| 698 | # positives for string-literals that contain the string |
| 699 | # "#doctest:". Eliminating these false positives would require |
| 700 | # actually parsing the string; but we limit them by ignoring any |
| 701 | # line containing "#doctest:" that is *followed* by a quote mark. |
| 702 | _OPTION_DIRECTIVE_RE = re.compile(r'#\s*doctest:\s*([^\n\'"]*)$', |
| 703 | re.MULTILINE) |
| 704 | |
| 705 | def _find_options(self, source, name, lineno): |
| 706 | """ |
| 707 | Return a dictionary containing option overrides extracted from |
| 708 | option directives in the given source string. |
| 709 | |
| 710 | `name` is the string's name, and `lineno` is the line number |
| 711 | where the example starts; both are used for error messages. |
| 712 | """ |
| 713 | options = {} |
| 714 | # (note: with the current regexp, this will match at most once:) |
| 715 | for m in self._OPTION_DIRECTIVE_RE.finditer(source): |
| 716 | option_strings = m.group(1).replace(',', ' ').split() |
| 717 | for option in option_strings: |
| 718 | if (option[0] not in '+-' or |
| 719 | option[1:] not in OPTIONFLAGS_BY_NAME): |
| 720 | raise ValueError('line %r of the doctest for %s ' |
| 721 | 'has an invalid option: %r' % |
| 722 | (lineno+1, name, option)) |
| 723 | flag = OPTIONFLAGS_BY_NAME[option[1:]] |
| 724 | options[flag] = (option[0] == '+') |
| 725 | if options and self._IS_BLANK_OR_COMMENT(source): |
| 726 | raise ValueError('line %r of the doctest for %s has an option ' |
| 727 | 'directive on a line with no example: %r' % |
| 728 | (lineno, name, source)) |
| 729 | return options |
| 730 | |
Edward Loper | a5db600 | 2004-08-12 02:41:30 +0000 | [diff] [blame] | 731 | # This regular expression finds the indentation of every non-blank |
| 732 | # line in a string. |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 733 | _INDENT_RE = re.compile('^([ ]*)(?=\S)', re.MULTILINE) |
Edward Loper | a5db600 | 2004-08-12 02:41:30 +0000 | [diff] [blame] | 734 | |
| 735 | def _min_indent(self, s): |
| 736 | "Return the minimum indentation of any non-blank line in `s`" |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 737 | indents = [len(indent) for indent in self._INDENT_RE.findall(s)] |
| 738 | if len(indents) > 0: |
| 739 | return min(indents) |
Tim Peters | dd0e475 | 2004-08-09 03:31:56 +0000 | [diff] [blame] | 740 | else: |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 741 | return 0 |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 742 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 743 | def _check_prompt_blank(self, lines, indent, name, lineno): |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 744 | """ |
| 745 | Given the lines of a source string (including prompts and |
| 746 | leading indentation), check to make sure that every prompt is |
| 747 | followed by a space character. If any line is not followed by |
| 748 | a space character, then raise ValueError. |
| 749 | """ |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 750 | for i, line in enumerate(lines): |
| 751 | if len(line) >= indent+4 and line[indent+3] != ' ': |
| 752 | raise ValueError('line %r of the docstring for %s ' |
| 753 | 'lacks blank after %s: %r' % |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 754 | (lineno+i+1, name, |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 755 | line[indent:indent+3], line)) |
| 756 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 757 | def _check_prefix(self, lines, prefix, name, lineno): |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 758 | """ |
| 759 | Check that every line in the given list starts with the given |
| 760 | prefix; if any line does not, then raise a ValueError. |
| 761 | """ |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 762 | for i, line in enumerate(lines): |
| 763 | if line and not line.startswith(prefix): |
| 764 | raise ValueError('line %r of the docstring for %s has ' |
| 765 | 'inconsistent leading whitespace: %r' % |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 766 | (lineno+i+1, name, line)) |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 767 | |
| 768 | |
| 769 | ###################################################################### |
| 770 | ## 4. DocTest Finder |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 771 | ###################################################################### |
| 772 | |
| 773 | class DocTestFinder: |
| 774 | """ |
| 775 | A class used to extract the DocTests that are relevant to a given |
| 776 | object, from its docstring and the docstrings of its contained |
| 777 | objects. Doctests can currently be extracted from the following |
| 778 | object types: modules, functions, classes, methods, staticmethods, |
| 779 | classmethods, and properties. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 780 | """ |
| 781 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 782 | def __init__(self, verbose=False, parser=DocTestParser(), |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 783 | recurse=True, exclude_empty=True): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 784 | """ |
| 785 | Create a new doctest finder. |
| 786 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 787 | The optional argument `parser` specifies a class or |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 788 | function that should be used to create new DocTest objects (or |
Tim Peters | 161c963 | 2004-08-08 03:38:33 +0000 | [diff] [blame] | 789 | objects that implement the same interface as DocTest). The |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 790 | signature for this factory function should match the signature |
| 791 | of the DocTest constructor. |
| 792 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 793 | If the optional argument `recurse` is false, then `find` will |
| 794 | only examine the given object, and not any contained objects. |
Edward Loper | 32ddbf7 | 2004-09-13 05:47:24 +0000 | [diff] [blame] | 795 | |
Tim Peters | 958cc89 | 2004-09-13 14:53:28 +0000 | [diff] [blame] | 796 | If the optional argument `exclude_empty` is false, then `find` |
| 797 | will include tests for objects with empty docstrings. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 798 | """ |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 799 | self._parser = parser |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 800 | self._verbose = verbose |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 801 | self._recurse = recurse |
Edward Loper | 32ddbf7 | 2004-09-13 05:47:24 +0000 | [diff] [blame] | 802 | self._exclude_empty = exclude_empty |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 803 | |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 804 | def find(self, obj, name=None, module=None, globs=None, extraglobs=None): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 805 | """ |
| 806 | Return a list of the DocTests that are defined by the given |
| 807 | object's docstring, or by any of its contained objects' |
| 808 | docstrings. |
| 809 | |
| 810 | The optional parameter `module` is the module that contains |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 811 | the given object. If the module is not specified or is None, then |
| 812 | the test finder will attempt to automatically determine the |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 813 | correct module. The object's module is used: |
| 814 | |
| 815 | - As a default namespace, if `globs` is not specified. |
| 816 | - To prevent the DocTestFinder from extracting DocTests |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 817 | from objects that are imported from other modules. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 818 | - To find the name of the file containing the object. |
| 819 | - To help find the line number of the object within its |
| 820 | file. |
| 821 | |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 822 | Contained objects whose module does not match `module` are ignored. |
| 823 | |
| 824 | If `module` is False, no attempt to find the module will be made. |
| 825 | This is obscure, of use mostly in tests: if `module` is False, or |
| 826 | is None but cannot be found automatically, then all objects are |
| 827 | considered to belong to the (non-existent) module, so all contained |
| 828 | objects will (recursively) be searched for doctests. |
| 829 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 830 | The globals for each DocTest is formed by combining `globs` |
| 831 | and `extraglobs` (bindings in `extraglobs` override bindings |
| 832 | in `globs`). A new copy of the globals dictionary is created |
| 833 | for each DocTest. If `globs` is not specified, then it |
| 834 | defaults to the module's `__dict__`, if specified, or {} |
| 835 | otherwise. If `extraglobs` is not specified, then it defaults |
| 836 | to {}. |
| 837 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 838 | """ |
| 839 | # If name was not specified, then extract it from the object. |
| 840 | if name is None: |
| 841 | name = getattr(obj, '__name__', None) |
| 842 | if name is None: |
| 843 | raise ValueError("DocTestFinder.find: name must be given " |
| 844 | "when obj.__name__ doesn't exist: %r" % |
| 845 | (type(obj),)) |
| 846 | |
| 847 | # Find the module that contains the given object (if obj is |
| 848 | # a module, then module=obj.). Note: this may fail, in which |
| 849 | # case module will be None. |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 850 | if module is False: |
| 851 | module = None |
| 852 | elif module is None: |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 853 | module = inspect.getmodule(obj) |
| 854 | |
| 855 | # Read the module's source code. This is used by |
| 856 | # DocTestFinder._find_lineno to find the line number for a |
| 857 | # given object's docstring. |
| 858 | try: |
R. David Murray | 58641de | 2009-06-12 15:33:19 +0000 | [diff] [blame] | 859 | file = inspect.getsourcefile(obj) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 860 | except TypeError: |
| 861 | source_lines = None |
R. David Murray | 58641de | 2009-06-12 15:33:19 +0000 | [diff] [blame] | 862 | else: |
| 863 | if not file: |
| 864 | # Check to see if it's one of our special internal "files" |
| 865 | # (see __patched_linecache_getlines). |
| 866 | file = inspect.getfile(obj) |
| 867 | if not file[0]+file[-2:] == '<]>': file = None |
R. David Murray | 765b976 | 2009-07-15 14:16:54 +0000 | [diff] [blame] | 868 | if file is None: |
| 869 | source_lines = None |
R. David Murray | 58641de | 2009-06-12 15:33:19 +0000 | [diff] [blame] | 870 | else: |
| 871 | if module is not None: |
| 872 | # Supply the module globals in case the module was |
| 873 | # originally loaded via a PEP 302 loader and |
| 874 | # file is not a valid filesystem path |
| 875 | source_lines = linecache.getlines(file, module.__dict__) |
| 876 | else: |
| 877 | # No access to a loader, so assume it's a normal |
| 878 | # filesystem path |
| 879 | source_lines = linecache.getlines(file) |
| 880 | if not source_lines: |
| 881 | source_lines = None |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 882 | |
| 883 | # Initialize globals, and merge in extraglobs. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 884 | if globs is None: |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 885 | if module is None: |
| 886 | globs = {} |
| 887 | else: |
| 888 | globs = module.__dict__.copy() |
| 889 | else: |
| 890 | globs = globs.copy() |
| 891 | if extraglobs is not None: |
| 892 | globs.update(extraglobs) |
Raymond Hettinger | 0f05517 | 2009-01-27 10:06:09 +0000 | [diff] [blame] | 893 | if '__name__' not in globs: |
| 894 | globs['__name__'] = '__main__' # provide a default module name |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 895 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 896 | # Recursively expore `obj`, extracting DocTests. |
| 897 | tests = [] |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 898 | self._find(tests, obj, name, module, source_lines, globs, {}) |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 899 | # Sort the tests by alpha order of names, for consistency in |
| 900 | # verbose-mode output. This was a feature of doctest in Pythons |
| 901 | # <= 2.3 that got lost by accident in 2.4. It was repaired in |
| 902 | # 2.4.4 and 2.5. |
| 903 | tests.sort() |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 904 | return tests |
| 905 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 906 | def _from_module(self, module, object): |
| 907 | """ |
| 908 | Return true if the given object is defined in the given |
| 909 | module. |
| 910 | """ |
| 911 | if module is None: |
| 912 | return True |
Benjamin Peterson | 6cadba7 | 2008-11-19 22:38:29 +0000 | [diff] [blame] | 913 | elif inspect.getmodule(object) is not None: |
| 914 | return module is inspect.getmodule(object) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 915 | elif inspect.isfunction(object): |
Neal Norwitz | 221085d | 2007-02-25 20:55:47 +0000 | [diff] [blame] | 916 | return module.__dict__ is object.__globals__ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 917 | elif inspect.isclass(object): |
| 918 | return module.__name__ == object.__module__ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 919 | elif hasattr(object, '__module__'): |
| 920 | return module.__name__ == object.__module__ |
| 921 | elif isinstance(object, property): |
| 922 | return True # [XX] no way not be sure. |
| 923 | else: |
| 924 | raise ValueError("object must be a class or function") |
| 925 | |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 926 | def _find(self, tests, obj, name, module, source_lines, globs, seen): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 927 | """ |
| 928 | Find tests for the given object and any contained objects, and |
| 929 | add them to `tests`. |
| 930 | """ |
| 931 | if self._verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 932 | print('Finding tests in %s' % name) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 933 | |
| 934 | # If we've already processed this object, then ignore it. |
| 935 | if id(obj) in seen: |
| 936 | return |
| 937 | seen[id(obj)] = 1 |
| 938 | |
| 939 | # Find a test for this object, and add it to the list of tests. |
| 940 | test = self._get_test(obj, name, module, globs, source_lines) |
| 941 | if test is not None: |
| 942 | tests.append(test) |
| 943 | |
| 944 | # Look for tests in a module's contained objects. |
| 945 | if inspect.ismodule(obj) and self._recurse: |
| 946 | for valname, val in obj.__dict__.items(): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 947 | valname = '%s.%s' % (name, valname) |
| 948 | # Recurse to functions & classes. |
| 949 | if ((inspect.isfunction(val) or inspect.isclass(val)) and |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 950 | self._from_module(module, val)): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 951 | self._find(tests, val, valname, module, source_lines, |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 952 | globs, seen) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 953 | |
| 954 | # Look for tests in a module's __test__ dictionary. |
| 955 | if inspect.ismodule(obj) and self._recurse: |
| 956 | for valname, val in getattr(obj, '__test__', {}).items(): |
Guido van Rossum | 3172c5d | 2007-10-16 18:12:55 +0000 | [diff] [blame] | 957 | if not isinstance(valname, str): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 958 | raise ValueError("DocTestFinder.find: __test__ keys " |
| 959 | "must be strings: %r" % |
| 960 | (type(valname),)) |
| 961 | if not (inspect.isfunction(val) or inspect.isclass(val) or |
| 962 | inspect.ismethod(val) or inspect.ismodule(val) or |
Guido van Rossum | 3172c5d | 2007-10-16 18:12:55 +0000 | [diff] [blame] | 963 | isinstance(val, str)): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 964 | raise ValueError("DocTestFinder.find: __test__ values " |
| 965 | "must be strings, functions, methods, " |
| 966 | "classes, or modules: %r" % |
| 967 | (type(val),)) |
Tim Peters | c568478 | 2004-09-13 01:07:12 +0000 | [diff] [blame] | 968 | valname = '%s.__test__.%s' % (name, valname) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 969 | self._find(tests, val, valname, module, source_lines, |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 970 | globs, seen) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 971 | |
| 972 | # Look for tests in a class's contained objects. |
| 973 | if inspect.isclass(obj) and self._recurse: |
| 974 | for valname, val in obj.__dict__.items(): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 975 | # Special handling for staticmethod/classmethod. |
| 976 | if isinstance(val, staticmethod): |
| 977 | val = getattr(obj, valname) |
| 978 | if isinstance(val, classmethod): |
Christian Heimes | ff73795 | 2007-11-27 10:40:20 +0000 | [diff] [blame] | 979 | val = getattr(obj, valname).__func__ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 980 | |
| 981 | # Recurse to methods, properties, and nested classes. |
| 982 | if ((inspect.isfunction(val) or inspect.isclass(val) or |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 983 | isinstance(val, property)) and |
| 984 | self._from_module(module, val)): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 985 | valname = '%s.%s' % (name, valname) |
| 986 | self._find(tests, val, valname, module, source_lines, |
Tim Peters | f3f5747 | 2004-08-08 06:11:48 +0000 | [diff] [blame] | 987 | globs, seen) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 988 | |
| 989 | def _get_test(self, obj, name, module, globs, source_lines): |
| 990 | """ |
| 991 | Return a DocTest for the given object, if it defines a docstring; |
| 992 | otherwise, return None. |
| 993 | """ |
| 994 | # Extract the object's docstring. If it doesn't have one, |
| 995 | # then return None (no test for this object). |
Guido van Rossum | 3172c5d | 2007-10-16 18:12:55 +0000 | [diff] [blame] | 996 | if isinstance(obj, str): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 997 | docstring = obj |
| 998 | else: |
| 999 | try: |
| 1000 | if obj.__doc__ is None: |
Edward Loper | 32ddbf7 | 2004-09-13 05:47:24 +0000 | [diff] [blame] | 1001 | docstring = '' |
| 1002 | else: |
Jim Fulton | 7d42878 | 2004-10-13 14:15:32 +0000 | [diff] [blame] | 1003 | docstring = obj.__doc__ |
Guido van Rossum | 3172c5d | 2007-10-16 18:12:55 +0000 | [diff] [blame] | 1004 | if not isinstance(docstring, str): |
Jim Fulton | 7d42878 | 2004-10-13 14:15:32 +0000 | [diff] [blame] | 1005 | docstring = str(docstring) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1006 | except (TypeError, AttributeError): |
Edward Loper | 32ddbf7 | 2004-09-13 05:47:24 +0000 | [diff] [blame] | 1007 | docstring = '' |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1008 | |
| 1009 | # Find the docstring's location in the file. |
| 1010 | lineno = self._find_lineno(obj, source_lines) |
| 1011 | |
Edward Loper | 32ddbf7 | 2004-09-13 05:47:24 +0000 | [diff] [blame] | 1012 | # Don't bother if the docstring is empty. |
| 1013 | if self._exclude_empty and not docstring: |
| 1014 | return None |
| 1015 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1016 | # Return a DocTest for this object. |
| 1017 | if module is None: |
| 1018 | filename = None |
| 1019 | else: |
| 1020 | filename = getattr(module, '__file__', module.__name__) |
Jim Fulton | 07a349c | 2004-08-22 14:10:00 +0000 | [diff] [blame] | 1021 | if filename[-4:] in (".pyc", ".pyo"): |
| 1022 | filename = filename[:-1] |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 1023 | return self._parser.get_doctest(docstring, globs, name, |
| 1024 | filename, lineno) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1025 | |
| 1026 | def _find_lineno(self, obj, source_lines): |
| 1027 | """ |
| 1028 | Return a line number of the given object's docstring. Note: |
| 1029 | this method assumes that the object has a docstring. |
| 1030 | """ |
| 1031 | lineno = None |
| 1032 | |
| 1033 | # Find the line number for modules. |
| 1034 | if inspect.ismodule(obj): |
| 1035 | lineno = 0 |
| 1036 | |
| 1037 | # Find the line number for classes. |
| 1038 | # Note: this could be fooled if a class is defined multiple |
| 1039 | # times in a single file. |
| 1040 | if inspect.isclass(obj): |
| 1041 | if source_lines is None: |
| 1042 | return None |
| 1043 | pat = re.compile(r'^\s*class\s*%s\b' % |
| 1044 | getattr(obj, '__name__', '-')) |
| 1045 | for i, line in enumerate(source_lines): |
| 1046 | if pat.match(line): |
| 1047 | lineno = i |
| 1048 | break |
| 1049 | |
| 1050 | # Find the line number for functions & methods. |
Christian Heimes | ff73795 | 2007-11-27 10:40:20 +0000 | [diff] [blame] | 1051 | if inspect.ismethod(obj): obj = obj.__func__ |
Neal Norwitz | 221085d | 2007-02-25 20:55:47 +0000 | [diff] [blame] | 1052 | if inspect.isfunction(obj): obj = obj.__code__ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1053 | if inspect.istraceback(obj): obj = obj.tb_frame |
| 1054 | if inspect.isframe(obj): obj = obj.f_code |
| 1055 | if inspect.iscode(obj): |
| 1056 | lineno = getattr(obj, 'co_firstlineno', None)-1 |
| 1057 | |
| 1058 | # Find the line number where the docstring starts. Assume |
| 1059 | # that it's the first line that begins with a quote mark. |
| 1060 | # Note: this could be fooled by a multiline function |
| 1061 | # signature, where a continuation line begins with a quote |
| 1062 | # mark. |
| 1063 | if lineno is not None: |
| 1064 | if source_lines is None: |
| 1065 | return lineno+1 |
| 1066 | pat = re.compile('(^|.*:)\s*\w*("|\')') |
| 1067 | for lineno in range(lineno, len(source_lines)): |
| 1068 | if pat.match(source_lines[lineno]): |
| 1069 | return lineno |
| 1070 | |
| 1071 | # We couldn't find the line number. |
| 1072 | return None |
| 1073 | |
| 1074 | ###################################################################### |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 1075 | ## 5. DocTest Runner |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1076 | ###################################################################### |
| 1077 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1078 | class DocTestRunner: |
| 1079 | """ |
| 1080 | A class used to run DocTest test cases, and accumulate statistics. |
| 1081 | The `run` method is used to process a single DocTest case. It |
| 1082 | returns a tuple `(f, t)`, where `t` is the number of test cases |
| 1083 | tried, and `f` is the number of test cases that failed. |
| 1084 | |
| 1085 | >>> tests = DocTestFinder().find(_TestClass) |
| 1086 | >>> runner = DocTestRunner(verbose=False) |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 1087 | >>> tests.sort(key = lambda test: test.name) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1088 | >>> for test in tests: |
Guido van Rossum | 7131f84 | 2007-02-09 20:13:25 +0000 | [diff] [blame] | 1089 | ... print(test.name, '->', runner.run(test)) |
Christian Heimes | 25bb783 | 2008-01-11 16:17:00 +0000 | [diff] [blame] | 1090 | _TestClass -> TestResults(failed=0, attempted=2) |
| 1091 | _TestClass.__init__ -> TestResults(failed=0, attempted=2) |
| 1092 | _TestClass.get -> TestResults(failed=0, attempted=2) |
| 1093 | _TestClass.square -> TestResults(failed=0, attempted=1) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1094 | |
| 1095 | The `summarize` method prints a summary of all the test cases that |
| 1096 | have been run by the runner, and returns an aggregated `(f, t)` |
| 1097 | tuple: |
| 1098 | |
| 1099 | >>> runner.summarize(verbose=1) |
| 1100 | 4 items passed all tests: |
| 1101 | 2 tests in _TestClass |
| 1102 | 2 tests in _TestClass.__init__ |
| 1103 | 2 tests in _TestClass.get |
| 1104 | 1 tests in _TestClass.square |
| 1105 | 7 tests in 4 items. |
| 1106 | 7 passed and 0 failed. |
| 1107 | Test passed. |
Christian Heimes | 25bb783 | 2008-01-11 16:17:00 +0000 | [diff] [blame] | 1108 | TestResults(failed=0, attempted=7) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1109 | |
| 1110 | The aggregated number of tried examples and failed examples is |
| 1111 | also available via the `tries` and `failures` attributes: |
| 1112 | |
| 1113 | >>> runner.tries |
| 1114 | 7 |
| 1115 | >>> runner.failures |
| 1116 | 0 |
| 1117 | |
| 1118 | The comparison between expected outputs and actual outputs is done |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1119 | by an `OutputChecker`. This comparison may be customized with a |
| 1120 | number of option flags; see the documentation for `testmod` for |
| 1121 | more information. If the option flags are insufficient, then the |
| 1122 | comparison may also be customized by passing a subclass of |
| 1123 | `OutputChecker` to the constructor. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1124 | |
| 1125 | The test runner's display output can be controlled in two ways. |
| 1126 | First, an output function (`out) can be passed to |
| 1127 | `TestRunner.run`; this function will be called with strings that |
| 1128 | should be displayed. It defaults to `sys.stdout.write`. If |
| 1129 | capturing the output is not sufficient, then the display output |
| 1130 | can be also customized by subclassing DocTestRunner, and |
| 1131 | overriding the methods `report_start`, `report_success`, |
| 1132 | `report_unexpected_exception`, and `report_failure`. |
| 1133 | """ |
| 1134 | # This divider string is used to separate failure messages, and to |
| 1135 | # separate sections of the summary. |
| 1136 | DIVIDER = "*" * 70 |
| 1137 | |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1138 | def __init__(self, checker=None, verbose=None, optionflags=0): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1139 | """ |
| 1140 | Create a new test runner. |
| 1141 | |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1142 | Optional keyword arg `checker` is the `OutputChecker` that |
| 1143 | should be used to compare the expected outputs and actual |
| 1144 | outputs of doctest examples. |
| 1145 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1146 | Optional keyword arg 'verbose' prints lots of stuff if true, |
| 1147 | only failures if false; by default, it's true iff '-v' is in |
| 1148 | sys.argv. |
| 1149 | |
| 1150 | Optional argument `optionflags` can be used to control how the |
| 1151 | test runner compares expected output to actual output, and how |
| 1152 | it displays failures. See the documentation for `testmod` for |
| 1153 | more information. |
| 1154 | """ |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1155 | self._checker = checker or OutputChecker() |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1156 | if verbose is None: |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1157 | verbose = '-v' in sys.argv |
| 1158 | self._verbose = verbose |
Tim Peters | 6ebe61f | 2003-06-27 20:48:05 +0000 | [diff] [blame] | 1159 | self.optionflags = optionflags |
Jim Fulton | 07a349c | 2004-08-22 14:10:00 +0000 | [diff] [blame] | 1160 | self.original_optionflags = optionflags |
Tim Peters | 6ebe61f | 2003-06-27 20:48:05 +0000 | [diff] [blame] | 1161 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1162 | # Keep track of the examples we've run. |
| 1163 | self.tries = 0 |
| 1164 | self.failures = 0 |
| 1165 | self._name2ft = {} |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1166 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1167 | # Create a fake output target for capturing doctest output. |
| 1168 | self._fakeout = _SpoofOut() |
Tim Peters | 4fd9e2f | 2001-08-18 00:05:50 +0000 | [diff] [blame] | 1169 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1170 | #///////////////////////////////////////////////////////////////// |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1171 | # Reporting methods |
| 1172 | #///////////////////////////////////////////////////////////////// |
Tim Peters | 17111f3 | 2001-10-03 04:08:26 +0000 | [diff] [blame] | 1173 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1174 | def report_start(self, out, test, example): |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1175 | """ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1176 | Report that the test runner is about to process the given |
| 1177 | example. (Only displays a message if verbose=True) |
| 1178 | """ |
| 1179 | if self._verbose: |
Edward Loper | aacf083 | 2004-08-26 01:19:50 +0000 | [diff] [blame] | 1180 | if example.want: |
| 1181 | out('Trying:\n' + _indent(example.source) + |
| 1182 | 'Expecting:\n' + _indent(example.want)) |
| 1183 | else: |
| 1184 | out('Trying:\n' + _indent(example.source) + |
| 1185 | 'Expecting nothing\n') |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1186 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1187 | def report_success(self, out, test, example, got): |
| 1188 | """ |
| 1189 | Report that the given example ran successfully. (Only |
| 1190 | displays a message if verbose=True) |
| 1191 | """ |
| 1192 | if self._verbose: |
| 1193 | out("ok\n") |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1194 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1195 | def report_failure(self, out, test, example, got): |
| 1196 | """ |
| 1197 | Report that the given example failed. |
| 1198 | """ |
Edward Loper | 8e4a34b | 2004-08-12 02:34:27 +0000 | [diff] [blame] | 1199 | out(self._failure_header(test, example) + |
Edward Loper | ca9111e | 2004-08-26 03:00:24 +0000 | [diff] [blame] | 1200 | self._checker.output_difference(example, got, self.optionflags)) |
Tim Peters | 7402f79 | 2001-10-02 03:53:41 +0000 | [diff] [blame] | 1201 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1202 | def report_unexpected_exception(self, out, test, example, exc_info): |
| 1203 | """ |
| 1204 | Report that the given example raised an unexpected exception. |
| 1205 | """ |
Edward Loper | 8e4a34b | 2004-08-12 02:34:27 +0000 | [diff] [blame] | 1206 | out(self._failure_header(test, example) + |
Edward Loper | aacf083 | 2004-08-26 01:19:50 +0000 | [diff] [blame] | 1207 | 'Exception raised:\n' + _indent(_exception_traceback(exc_info))) |
Tim Peters | 7402f79 | 2001-10-02 03:53:41 +0000 | [diff] [blame] | 1208 | |
Edward Loper | 8e4a34b | 2004-08-12 02:34:27 +0000 | [diff] [blame] | 1209 | def _failure_header(self, test, example): |
Jim Fulton | 07a349c | 2004-08-22 14:10:00 +0000 | [diff] [blame] | 1210 | out = [self.DIVIDER] |
| 1211 | if test.filename: |
| 1212 | if test.lineno is not None and example.lineno is not None: |
| 1213 | lineno = test.lineno + example.lineno + 1 |
| 1214 | else: |
| 1215 | lineno = '?' |
| 1216 | out.append('File "%s", line %s, in %s' % |
| 1217 | (test.filename, lineno, test.name)) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1218 | else: |
Jim Fulton | 07a349c | 2004-08-22 14:10:00 +0000 | [diff] [blame] | 1219 | out.append('Line %s, in %s' % (example.lineno+1, test.name)) |
| 1220 | out.append('Failed example:') |
| 1221 | source = example.source |
Edward Loper | aacf083 | 2004-08-26 01:19:50 +0000 | [diff] [blame] | 1222 | out.append(_indent(source)) |
| 1223 | return '\n'.join(out) |
Tim Peters | 7402f79 | 2001-10-02 03:53:41 +0000 | [diff] [blame] | 1224 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1225 | #///////////////////////////////////////////////////////////////// |
| 1226 | # DocTest Running |
| 1227 | #///////////////////////////////////////////////////////////////// |
Tim Peters | 7402f79 | 2001-10-02 03:53:41 +0000 | [diff] [blame] | 1228 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1229 | def __run(self, test, compileflags, out): |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1230 | """ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1231 | Run the examples in `test`. Write the outcome of each example |
| 1232 | with one of the `DocTestRunner.report_*` methods, using the |
| 1233 | writer function `out`. `compileflags` is the set of compiler |
| 1234 | flags that should be used to execute examples. Return a tuple |
| 1235 | `(f, t)`, where `t` is the number of examples tried, and `f` |
| 1236 | is the number of examples that failed. The examples are run |
| 1237 | in the namespace `test.globs`. |
| 1238 | """ |
| 1239 | # Keep track of the number of failures and tries. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1240 | failures = tries = 0 |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1241 | |
| 1242 | # Save the option flags (since option directives can be used |
| 1243 | # to modify them). |
| 1244 | original_optionflags = self.optionflags |
| 1245 | |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1246 | SUCCESS, FAILURE, BOOM = range(3) # `outcome` state |
| 1247 | |
| 1248 | check = self._checker.check_output |
| 1249 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1250 | # Process each example. |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1251 | for examplenum, example in enumerate(test.examples): |
| 1252 | |
Ezio Melotti | 1392500 | 2011-03-16 11:05:33 +0200 | [diff] [blame] | 1253 | # If REPORT_ONLY_FIRST_FAILURE is set, then suppress |
Edward Loper | a89f88d | 2004-08-26 02:45:51 +0000 | [diff] [blame] | 1254 | # reporting after the first failure. |
| 1255 | quiet = (self.optionflags & REPORT_ONLY_FIRST_FAILURE and |
| 1256 | failures > 0) |
| 1257 | |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 1258 | # Merge in the example's options. |
| 1259 | self.optionflags = original_optionflags |
| 1260 | if example.options: |
| 1261 | for (optionflag, val) in example.options.items(): |
| 1262 | if val: |
| 1263 | self.optionflags |= optionflag |
| 1264 | else: |
| 1265 | self.optionflags &= ~optionflag |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1266 | |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 1267 | # If 'SKIP' is set, then skip this example. |
| 1268 | if self.optionflags & SKIP: |
| 1269 | continue |
| 1270 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1271 | # Record that we started this example. |
| 1272 | tries += 1 |
Edward Loper | a89f88d | 2004-08-26 02:45:51 +0000 | [diff] [blame] | 1273 | if not quiet: |
| 1274 | self.report_start(out, test, example) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1275 | |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1276 | # Use a special filename for compile(), so we can retrieve |
| 1277 | # the source code during interactive debugging (see |
| 1278 | # __patched_linecache_getlines). |
| 1279 | filename = '<doctest %s[%d]>' % (test.name, examplenum) |
| 1280 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1281 | # Run the example in the given context (globs), and record |
| 1282 | # any exception that gets raised. (But don't intercept |
| 1283 | # keyboard interrupts.) |
| 1284 | try: |
Tim Peters | 208ca70 | 2004-08-09 04:12:36 +0000 | [diff] [blame] | 1285 | # Don't blink! This is where the user's code gets run. |
Georg Brandl | 7cae87c | 2006-09-06 06:51:57 +0000 | [diff] [blame] | 1286 | exec(compile(example.source, filename, "single", |
| 1287 | compileflags, 1), test.globs) |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1288 | self.debugger.set_continue() # ==== Example Finished ==== |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1289 | exception = None |
| 1290 | except KeyboardInterrupt: |
| 1291 | raise |
| 1292 | except: |
| 1293 | exception = sys.exc_info() |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1294 | self.debugger.set_continue() # ==== Example Finished ==== |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1295 | |
Tim Peters | 208ca70 | 2004-08-09 04:12:36 +0000 | [diff] [blame] | 1296 | got = self._fakeout.getvalue() # the actual output |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1297 | self._fakeout.truncate(0) |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1298 | outcome = FAILURE # guilty until proved innocent or insane |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1299 | |
| 1300 | # If the example executed without raising any exceptions, |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1301 | # verify its output. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1302 | if exception is None: |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1303 | if check(example.want, got, self.optionflags): |
| 1304 | outcome = SUCCESS |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1305 | |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1306 | # The example raised an exception: check if it was expected. |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1307 | else: |
Benjamin Peterson | eec3d71 | 2008-06-11 15:59:43 +0000 | [diff] [blame] | 1308 | exc_msg = traceback.format_exception_only(*exception[:2])[-1] |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1309 | if not quiet: |
Benjamin Peterson | eec3d71 | 2008-06-11 15:59:43 +0000 | [diff] [blame] | 1310 | got += _exception_traceback(exception) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1311 | |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1312 | # If `example.exc_msg` is None, then we weren't expecting |
| 1313 | # an exception. |
Edward Loper | a6b6832 | 2004-08-26 00:05:43 +0000 | [diff] [blame] | 1314 | if example.exc_msg is None: |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1315 | outcome = BOOM |
| 1316 | |
| 1317 | # We expected an exception: see whether it matches. |
| 1318 | elif check(example.exc_msg, exc_msg, self.optionflags): |
| 1319 | outcome = SUCCESS |
| 1320 | |
| 1321 | # Another chance if they didn't care about the detail. |
| 1322 | elif self.optionflags & IGNORE_EXCEPTION_DETAIL: |
Nick Coghlan | 5e76e94 | 2010-06-12 13:42:46 +0000 | [diff] [blame] | 1323 | m1 = re.match(r'(?:[^:]*\.)?([^:]*:)', example.exc_msg) |
| 1324 | m2 = re.match(r'(?:[^:]*\.)?([^:]*:)', exc_msg) |
| 1325 | if m1 and m2 and check(m1.group(1), m2.group(1), |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1326 | self.optionflags): |
| 1327 | outcome = SUCCESS |
| 1328 | |
| 1329 | # Report the outcome. |
| 1330 | if outcome is SUCCESS: |
| 1331 | if not quiet: |
| 1332 | self.report_success(out, test, example, got) |
| 1333 | elif outcome is FAILURE: |
| 1334 | if not quiet: |
| 1335 | self.report_failure(out, test, example, got) |
| 1336 | failures += 1 |
| 1337 | elif outcome is BOOM: |
| 1338 | if not quiet: |
| 1339 | self.report_unexpected_exception(out, test, example, |
Benjamin Peterson | eec3d71 | 2008-06-11 15:59:43 +0000 | [diff] [blame] | 1340 | exception) |
Tim Peters | 1fbf9c5 | 2004-09-04 17:21:02 +0000 | [diff] [blame] | 1341 | failures += 1 |
| 1342 | else: |
| 1343 | assert False, ("unknown outcome", outcome) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1344 | |
| 1345 | # Restore the option flags (in case they were modified) |
| 1346 | self.optionflags = original_optionflags |
| 1347 | |
| 1348 | # Record and return the number of failures and tries. |
| 1349 | self.__record_outcome(test, failures, tries) |
Christian Heimes | 25bb783 | 2008-01-11 16:17:00 +0000 | [diff] [blame] | 1350 | return TestResults(failures, tries) |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1351 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1352 | def __record_outcome(self, test, f, t): |
| 1353 | """ |
| 1354 | Record the fact that the given DocTest (`test`) generated `f` |
| 1355 | failures out of `t` tried examples. |
| 1356 | """ |
| 1357 | f2, t2 = self._name2ft.get(test.name, (0,0)) |
| 1358 | self._name2ft[test.name] = (f+f2, t+t2) |
| 1359 | self.failures += f |
| 1360 | self.tries += t |
| 1361 | |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1362 | __LINECACHE_FILENAME_RE = re.compile(r'<doctest ' |
Florent Xicluna | d9f5763 | 2010-10-14 20:56:20 +0000 | [diff] [blame] | 1363 | r'(?P<name>.+)' |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1364 | r'\[(?P<examplenum>\d+)\]>$') |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1365 | def __patched_linecache_getlines(self, filename, module_globals=None): |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1366 | m = self.__LINECACHE_FILENAME_RE.match(filename) |
| 1367 | if m and m.group('name') == self.test.name: |
| 1368 | example = self.test.examples[int(m.group('examplenum'))] |
Ezio Melotti | d8b509b | 2011-09-28 17:37:55 +0300 | [diff] [blame] | 1369 | return example.source.splitlines(keepends=True) |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1370 | else: |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1371 | return self.save_linecache_getlines(filename, module_globals) |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1372 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1373 | def run(self, test, compileflags=None, out=None, clear_globs=True): |
| 1374 | """ |
| 1375 | Run the examples in `test`, and display the results using the |
| 1376 | writer function `out`. |
| 1377 | |
| 1378 | The examples are run in the namespace `test.globs`. If |
| 1379 | `clear_globs` is true (the default), then this namespace will |
| 1380 | be cleared after the test runs, to help with garbage |
| 1381 | collection. If you would like to examine the namespace after |
| 1382 | the test completes, then use `clear_globs=False`. |
| 1383 | |
| 1384 | `compileflags` gives the set of flags that should be used by |
| 1385 | the Python compiler when running the examples. If not |
| 1386 | specified, then it will default to the set of future-import |
| 1387 | flags that apply to `globs`. |
| 1388 | |
| 1389 | The output of each example is checked using |
| 1390 | `DocTestRunner.check_output`, and the results are formatted by |
| 1391 | the `DocTestRunner.report_*` methods. |
| 1392 | """ |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1393 | self.test = test |
| 1394 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1395 | if compileflags is None: |
| 1396 | compileflags = _extract_future_flags(test.globs) |
Jim Fulton | 356fd19 | 2004-08-09 11:34:47 +0000 | [diff] [blame] | 1397 | |
Tim Peters | 6c542b7 | 2004-08-09 16:43:36 +0000 | [diff] [blame] | 1398 | save_stdout = sys.stdout |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1399 | if out is None: |
Florent Xicluna | 5925085 | 2010-02-27 14:21:57 +0000 | [diff] [blame] | 1400 | encoding = save_stdout.encoding |
| 1401 | if encoding is None or encoding.lower() == 'utf-8': |
| 1402 | out = save_stdout.write |
| 1403 | else: |
| 1404 | # Use backslashreplace error handling on write |
| 1405 | def out(s): |
| 1406 | s = str(s.encode(encoding, 'backslashreplace'), encoding) |
| 1407 | save_stdout.write(s) |
Tim Peters | 6c542b7 | 2004-08-09 16:43:36 +0000 | [diff] [blame] | 1408 | sys.stdout = self._fakeout |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1409 | |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1410 | # Patch pdb.set_trace to restore sys.stdout during interactive |
| 1411 | # debugging (so it's not still redirected to self._fakeout). |
| 1412 | # Note that the interactive output will go to *our* |
| 1413 | # save_stdout, even if that's not the real sys.stdout; this |
| 1414 | # allows us to write test cases for the set_trace behavior. |
Brett Cannon | 31f5929 | 2011-02-21 19:29:56 +0000 | [diff] [blame] | 1415 | save_trace = sys.gettrace() |
Tim Peters | 6c542b7 | 2004-08-09 16:43:36 +0000 | [diff] [blame] | 1416 | save_set_trace = pdb.set_trace |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1417 | self.debugger = _OutputRedirectingPdb(save_stdout) |
| 1418 | self.debugger.reset() |
| 1419 | pdb.set_trace = self.debugger.set_trace |
| 1420 | |
| 1421 | # Patch linecache.getlines, so we can see the example's source |
| 1422 | # when we're inside the debugger. |
| 1423 | self.save_linecache_getlines = linecache.getlines |
| 1424 | linecache.getlines = self.__patched_linecache_getlines |
| 1425 | |
Georg Brandl | 25fbb89 | 2010-07-30 09:23:23 +0000 | [diff] [blame] | 1426 | # Make sure sys.displayhook just prints the value to stdout |
| 1427 | save_displayhook = sys.displayhook |
| 1428 | sys.displayhook = sys.__displayhook__ |
| 1429 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1430 | try: |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1431 | return self.__run(test, compileflags, out) |
| 1432 | finally: |
Tim Peters | 6c542b7 | 2004-08-09 16:43:36 +0000 | [diff] [blame] | 1433 | sys.stdout = save_stdout |
| 1434 | pdb.set_trace = save_set_trace |
Brett Cannon | 31f5929 | 2011-02-21 19:29:56 +0000 | [diff] [blame] | 1435 | sys.settrace(save_trace) |
Edward Loper | 2de91ba | 2004-08-27 02:07:46 +0000 | [diff] [blame] | 1436 | linecache.getlines = self.save_linecache_getlines |
Georg Brandl | 25fbb89 | 2010-07-30 09:23:23 +0000 | [diff] [blame] | 1437 | sys.displayhook = save_displayhook |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1438 | if clear_globs: |
| 1439 | test.globs.clear() |
Benjamin Peterson | fbf66bd | 2008-07-29 15:55:50 +0000 | [diff] [blame] | 1440 | import builtins |
| 1441 | builtins._ = None |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1442 | |
| 1443 | #///////////////////////////////////////////////////////////////// |
| 1444 | # Summarization |
| 1445 | #///////////////////////////////////////////////////////////////// |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1446 | def summarize(self, verbose=None): |
| 1447 | """ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1448 | Print a summary of all the test cases that have been run by |
| 1449 | this DocTestRunner, and return a tuple `(f, t)`, where `f` is |
| 1450 | the total number of failed examples, and `t` is the total |
| 1451 | number of tried examples. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1452 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1453 | The optional `verbose` argument controls how detailed the |
| 1454 | summary is. If the verbosity is not specified, then the |
| 1455 | DocTestRunner's verbosity is used. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1456 | """ |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1457 | if verbose is None: |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1458 | verbose = self._verbose |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1459 | notests = [] |
| 1460 | passed = [] |
| 1461 | failed = [] |
| 1462 | totalt = totalf = 0 |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1463 | for x in self._name2ft.items(): |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1464 | name, (f, t) = x |
| 1465 | assert f <= t |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1466 | totalt += t |
| 1467 | totalf += f |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1468 | if t == 0: |
| 1469 | notests.append(name) |
| 1470 | elif f == 0: |
| 1471 | passed.append( (name, t) ) |
| 1472 | else: |
| 1473 | failed.append(x) |
| 1474 | if verbose: |
| 1475 | if notests: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 1476 | print(len(notests), "items had no tests:") |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1477 | notests.sort() |
| 1478 | for thing in notests: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 1479 | print(" ", thing) |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1480 | if passed: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 1481 | print(len(passed), "items passed all tests:") |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1482 | passed.sort() |
| 1483 | for thing, count in passed: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 1484 | print(" %3d tests in %s" % (count, thing)) |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1485 | if failed: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 1486 | print(self.DIVIDER) |
| 1487 | print(len(failed), "items had failures:") |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1488 | failed.sort() |
| 1489 | for thing, (f, t) in failed: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 1490 | print(" %3d of %3d in %s" % (f, t, thing)) |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1491 | if verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 1492 | print(totalt, "tests in", len(self._name2ft), "items.") |
| 1493 | print(totalt - totalf, "passed and", totalf, "failed.") |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1494 | if totalf: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 1495 | print("***Test Failed***", totalf, "failures.") |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1496 | elif verbose: |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 1497 | print("Test passed.") |
Christian Heimes | 25bb783 | 2008-01-11 16:17:00 +0000 | [diff] [blame] | 1498 | return TestResults(totalf, totalt) |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1499 | |
Tim Peters | 82076ef | 2004-09-13 00:52:51 +0000 | [diff] [blame] | 1500 | #///////////////////////////////////////////////////////////////// |
| 1501 | # Backward compatibility cruft to maintain doctest.master. |
| 1502 | #///////////////////////////////////////////////////////////////// |
| 1503 | def merge(self, other): |
| 1504 | d = self._name2ft |
| 1505 | for name, (f, t) in other._name2ft.items(): |
| 1506 | if name in d: |
Nick Coghlan | 3862200 | 2008-12-15 12:01:34 +0000 | [diff] [blame] | 1507 | # Don't print here by default, since doing |
| 1508 | # so breaks some of the buildbots |
| 1509 | #print("*** DocTestRunner.merge: '" + name + "' in both" \ |
| 1510 | # " testers; summing outcomes.") |
Tim Peters | 82076ef | 2004-09-13 00:52:51 +0000 | [diff] [blame] | 1511 | f2, t2 = d[name] |
| 1512 | f = f + f2 |
| 1513 | t = t + t2 |
| 1514 | d[name] = f, t |
| 1515 | |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1516 | class OutputChecker: |
| 1517 | """ |
| 1518 | A class used to check the whether the actual output from a doctest |
| 1519 | example matches the expected output. `OutputChecker` defines two |
| 1520 | methods: `check_output`, which compares a given pair of outputs, |
| 1521 | and returns true if they match; and `output_difference`, which |
| 1522 | returns a string describing the differences between two outputs. |
| 1523 | """ |
Georg Brandl | 559e5d7 | 2008-06-11 18:37:52 +0000 | [diff] [blame] | 1524 | def _toAscii(self, s): |
| 1525 | """ |
| 1526 | Convert string to hex-escaped ASCII string. |
| 1527 | """ |
| 1528 | return str(s.encode('ASCII', 'backslashreplace'), "ASCII") |
| 1529 | |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1530 | def check_output(self, want, got, optionflags): |
| 1531 | """ |
Edward Loper | 74bca7a | 2004-08-12 02:27:44 +0000 | [diff] [blame] | 1532 | Return True iff the actual output from an example (`got`) |
| 1533 | matches the expected output (`want`). These strings are |
| 1534 | always considered to match if they are identical; but |
| 1535 | depending on what option flags the test runner is using, |
| 1536 | several non-exact match types are also possible. See the |
| 1537 | documentation for `TestRunner` for more information about |
| 1538 | option flags. |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1539 | """ |
Georg Brandl | 559e5d7 | 2008-06-11 18:37:52 +0000 | [diff] [blame] | 1540 | |
| 1541 | # If `want` contains hex-escaped character such as "\u1234", |
| 1542 | # then `want` is a string of six characters(e.g. [\,u,1,2,3,4]). |
| 1543 | # On the other hand, `got` could be an another sequence of |
| 1544 | # characters such as [\u1234], so `want` and `got` should |
| 1545 | # be folded to hex-escaped ASCII string to compare. |
| 1546 | got = self._toAscii(got) |
| 1547 | want = self._toAscii(want) |
| 1548 | |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1549 | # Handle the common case first, for efficiency: |
| 1550 | # if they're string-identical, always return true. |
| 1551 | if got == want: |
| 1552 | return True |
| 1553 | |
| 1554 | # The values True and False replaced 1 and 0 as the return |
| 1555 | # value for boolean comparisons in Python 2.3. |
| 1556 | if not (optionflags & DONT_ACCEPT_TRUE_FOR_1): |
| 1557 | if (got,want) == ("True\n", "1\n"): |
| 1558 | return True |
| 1559 | if (got,want) == ("False\n", "0\n"): |
| 1560 | return True |
| 1561 | |
| 1562 | # <BLANKLINE> can be used as a special sequence to signify a |
| 1563 | # blank line, unless the DONT_ACCEPT_BLANKLINE flag is used. |
| 1564 | if not (optionflags & DONT_ACCEPT_BLANKLINE): |
| 1565 | # Replace <BLANKLINE> in want with a blank line. |
| 1566 | want = re.sub('(?m)^%s\s*?$' % re.escape(BLANKLINE_MARKER), |
| 1567 | '', want) |
| 1568 | # If a line in got contains only spaces, then remove the |
| 1569 | # spaces. |
| 1570 | got = re.sub('(?m)^\s*?$', '', got) |
| 1571 | if got == want: |
| 1572 | return True |
| 1573 | |
| 1574 | # This flag causes doctest to ignore any differences in the |
| 1575 | # contents of whitespace strings. Note that this can be used |
Tim Peters | 3fa8c20 | 2004-08-23 21:43:39 +0000 | [diff] [blame] | 1576 | # in conjunction with the ELLIPSIS flag. |
Tim Peters | 1cf3aa6 | 2004-08-19 06:49:33 +0000 | [diff] [blame] | 1577 | if optionflags & NORMALIZE_WHITESPACE: |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1578 | got = ' '.join(got.split()) |
| 1579 | want = ' '.join(want.split()) |
| 1580 | if got == want: |
| 1581 | return True |
| 1582 | |
| 1583 | # The ELLIPSIS flag says to let the sequence "..." in `want` |
Tim Peters | 26b3ebb | 2004-08-19 08:10:08 +0000 | [diff] [blame] | 1584 | # match any substring in `got`. |
Tim Peters | 1cf3aa6 | 2004-08-19 06:49:33 +0000 | [diff] [blame] | 1585 | if optionflags & ELLIPSIS: |
Tim Peters | b0a04e1 | 2004-08-20 02:08:04 +0000 | [diff] [blame] | 1586 | if _ellipsis_match(want, got): |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1587 | return True |
| 1588 | |
| 1589 | # We didn't find any match; return false. |
| 1590 | return False |
| 1591 | |
Tim Peters | c6cbab0 | 2004-08-22 19:43:28 +0000 | [diff] [blame] | 1592 | # Should we do a fancy diff? |
| 1593 | def _do_a_fancy_diff(self, want, got, optionflags): |
| 1594 | # Not unless they asked for a fancy diff. |
Edward Loper | 71f55af | 2004-08-26 01:41:51 +0000 | [diff] [blame] | 1595 | if not optionflags & (REPORT_UDIFF | |
| 1596 | REPORT_CDIFF | |
| 1597 | REPORT_NDIFF): |
Tim Peters | c6cbab0 | 2004-08-22 19:43:28 +0000 | [diff] [blame] | 1598 | return False |
Tim Peters | 5b799c1 | 2004-08-26 05:21:59 +0000 | [diff] [blame] | 1599 | |
Tim Peters | c6cbab0 | 2004-08-22 19:43:28 +0000 | [diff] [blame] | 1600 | # If expected output uses ellipsis, a meaningful fancy diff is |
Tim Peters | 5b799c1 | 2004-08-26 05:21:59 +0000 | [diff] [blame] | 1601 | # too hard ... or maybe not. In two real-life failures Tim saw, |
| 1602 | # a diff was a major help anyway, so this is commented out. |
| 1603 | # [todo] _ellipsis_match() knows which pieces do and don't match, |
| 1604 | # and could be the basis for a kick-ass diff in this case. |
| 1605 | ##if optionflags & ELLIPSIS and ELLIPSIS_MARKER in want: |
| 1606 | ## return False |
| 1607 | |
Tim Peters | c6cbab0 | 2004-08-22 19:43:28 +0000 | [diff] [blame] | 1608 | # ndiff does intraline difference marking, so can be useful even |
Tim Peters | 5b799c1 | 2004-08-26 05:21:59 +0000 | [diff] [blame] | 1609 | # for 1-line differences. |
Edward Loper | 71f55af | 2004-08-26 01:41:51 +0000 | [diff] [blame] | 1610 | if optionflags & REPORT_NDIFF: |
Tim Peters | c6cbab0 | 2004-08-22 19:43:28 +0000 | [diff] [blame] | 1611 | return True |
Tim Peters | 5b799c1 | 2004-08-26 05:21:59 +0000 | [diff] [blame] | 1612 | |
Tim Peters | c6cbab0 | 2004-08-22 19:43:28 +0000 | [diff] [blame] | 1613 | # The other diff types need at least a few lines to be helpful. |
| 1614 | return want.count('\n') > 2 and got.count('\n') > 2 |
| 1615 | |
Edward Loper | ca9111e | 2004-08-26 03:00:24 +0000 | [diff] [blame] | 1616 | def output_difference(self, example, got, optionflags): |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1617 | """ |
| 1618 | Return a string describing the differences between the |
Edward Loper | ca9111e | 2004-08-26 03:00:24 +0000 | [diff] [blame] | 1619 | expected output for a given example (`example`) and the actual |
| 1620 | output (`got`). `optionflags` is the set of option flags used |
| 1621 | to compare `want` and `got`. |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1622 | """ |
Edward Loper | ca9111e | 2004-08-26 03:00:24 +0000 | [diff] [blame] | 1623 | want = example.want |
Edward Loper | 68ba9a6 | 2004-08-12 02:43:49 +0000 | [diff] [blame] | 1624 | # If <BLANKLINE>s are being used, then replace blank lines |
| 1625 | # with <BLANKLINE> in the actual output string. |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1626 | if not (optionflags & DONT_ACCEPT_BLANKLINE): |
Edward Loper | 68ba9a6 | 2004-08-12 02:43:49 +0000 | [diff] [blame] | 1627 | got = re.sub('(?m)^[ ]*(?=\n)', BLANKLINE_MARKER, got) |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1628 | |
Tim Peters | 5b799c1 | 2004-08-26 05:21:59 +0000 | [diff] [blame] | 1629 | # Check if we should use diff. |
Tim Peters | c6cbab0 | 2004-08-22 19:43:28 +0000 | [diff] [blame] | 1630 | if self._do_a_fancy_diff(want, got, optionflags): |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1631 | # Split want & got into lines. |
Ezio Melotti | d8b509b | 2011-09-28 17:37:55 +0300 | [diff] [blame] | 1632 | want_lines = want.splitlines(keepends=True) |
| 1633 | got_lines = got.splitlines(keepends=True) |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1634 | # Use difflib to find their differences. |
Edward Loper | 71f55af | 2004-08-26 01:41:51 +0000 | [diff] [blame] | 1635 | if optionflags & REPORT_UDIFF: |
Edward Loper | 5662929 | 2004-08-26 01:31:56 +0000 | [diff] [blame] | 1636 | diff = difflib.unified_diff(want_lines, got_lines, n=2) |
| 1637 | diff = list(diff)[2:] # strip the diff header |
| 1638 | kind = 'unified diff with -expected +actual' |
Edward Loper | 71f55af | 2004-08-26 01:41:51 +0000 | [diff] [blame] | 1639 | elif optionflags & REPORT_CDIFF: |
Edward Loper | 5662929 | 2004-08-26 01:31:56 +0000 | [diff] [blame] | 1640 | diff = difflib.context_diff(want_lines, got_lines, n=2) |
| 1641 | diff = list(diff)[2:] # strip the diff header |
| 1642 | kind = 'context diff with expected followed by actual' |
Edward Loper | 71f55af | 2004-08-26 01:41:51 +0000 | [diff] [blame] | 1643 | elif optionflags & REPORT_NDIFF: |
Tim Peters | c6cbab0 | 2004-08-22 19:43:28 +0000 | [diff] [blame] | 1644 | engine = difflib.Differ(charjunk=difflib.IS_CHARACTER_JUNK) |
| 1645 | diff = list(engine.compare(want_lines, got_lines)) |
| 1646 | kind = 'ndiff with -expected +actual' |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1647 | else: |
| 1648 | assert 0, 'Bad diff option' |
| 1649 | # Remove trailing whitespace on diff output. |
| 1650 | diff = [line.rstrip() + '\n' for line in diff] |
Edward Loper | aacf083 | 2004-08-26 01:19:50 +0000 | [diff] [blame] | 1651 | return 'Differences (%s):\n' % kind + _indent(''.join(diff)) |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1652 | |
| 1653 | # If we're not using diff, then simply list the expected |
| 1654 | # output followed by the actual output. |
Edward Loper | aacf083 | 2004-08-26 01:19:50 +0000 | [diff] [blame] | 1655 | if want and got: |
| 1656 | return 'Expected:\n%sGot:\n%s' % (_indent(want), _indent(got)) |
| 1657 | elif want: |
| 1658 | return 'Expected:\n%sGot nothing\n' % _indent(want) |
| 1659 | elif got: |
| 1660 | return 'Expected nothing\nGot:\n%s' % _indent(got) |
| 1661 | else: |
| 1662 | return 'Expected nothing\nGot nothing\n' |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 1663 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1664 | class DocTestFailure(Exception): |
| 1665 | """A DocTest example has failed in debugging mode. |
| 1666 | |
| 1667 | The exception instance has variables: |
| 1668 | |
| 1669 | - test: the DocTest object being run |
| 1670 | |
Neal Norwitz | c082cb7 | 2006-08-29 05:40:08 +0000 | [diff] [blame] | 1671 | - example: the Example object that failed |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1672 | |
| 1673 | - got: the actual output |
| 1674 | """ |
| 1675 | def __init__(self, test, example, got): |
| 1676 | self.test = test |
| 1677 | self.example = example |
| 1678 | self.got = got |
| 1679 | |
| 1680 | def __str__(self): |
| 1681 | return str(self.test) |
| 1682 | |
| 1683 | class UnexpectedException(Exception): |
| 1684 | """A DocTest example has encountered an unexpected exception |
| 1685 | |
| 1686 | The exception instance has variables: |
| 1687 | |
| 1688 | - test: the DocTest object being run |
| 1689 | |
Guido van Rossum | 6a2a2a0 | 2006-08-26 20:37:44 +0000 | [diff] [blame] | 1690 | - example: the Example object that failed |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1691 | |
| 1692 | - exc_info: the exception info |
| 1693 | """ |
| 1694 | def __init__(self, test, example, exc_info): |
| 1695 | self.test = test |
| 1696 | self.example = example |
| 1697 | self.exc_info = exc_info |
| 1698 | |
| 1699 | def __str__(self): |
| 1700 | return str(self.test) |
Tim Peters | d1b7827 | 2004-08-07 06:03:09 +0000 | [diff] [blame] | 1701 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1702 | class DebugRunner(DocTestRunner): |
| 1703 | r"""Run doc tests but raise an exception as soon as there is a failure. |
| 1704 | |
| 1705 | If an unexpected exception occurs, an UnexpectedException is raised. |
| 1706 | It contains the test, the example, and the original exception: |
| 1707 | |
| 1708 | >>> runner = DebugRunner(verbose=False) |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 1709 | >>> test = DocTestParser().get_doctest('>>> raise KeyError\n42', |
| 1710 | ... {}, 'foo', 'foo.py', 0) |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1711 | >>> try: |
| 1712 | ... runner.run(test) |
Guido van Rossum | b940e11 | 2007-01-10 16:19:56 +0000 | [diff] [blame] | 1713 | ... except UnexpectedException as f: |
| 1714 | ... failure = f |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1715 | |
| 1716 | >>> failure.test is test |
| 1717 | True |
| 1718 | |
| 1719 | >>> failure.example.want |
| 1720 | '42\n' |
| 1721 | |
| 1722 | >>> exc_info = failure.exc_info |
Collin Winter | 828f04a | 2007-08-31 00:04:24 +0000 | [diff] [blame] | 1723 | >>> raise exc_info[1] # Already has the traceback |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1724 | Traceback (most recent call last): |
| 1725 | ... |
| 1726 | KeyError |
| 1727 | |
| 1728 | We wrap the original exception to give the calling application |
| 1729 | access to the test and example information. |
| 1730 | |
| 1731 | If the output doesn't match, then a DocTestFailure is raised: |
| 1732 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 1733 | >>> test = DocTestParser().get_doctest(''' |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1734 | ... >>> x = 1 |
| 1735 | ... >>> x |
| 1736 | ... 2 |
| 1737 | ... ''', {}, 'foo', 'foo.py', 0) |
| 1738 | |
| 1739 | >>> try: |
| 1740 | ... runner.run(test) |
Guido van Rossum | b940e11 | 2007-01-10 16:19:56 +0000 | [diff] [blame] | 1741 | ... except DocTestFailure as f: |
| 1742 | ... failure = f |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1743 | |
| 1744 | DocTestFailure objects provide access to the test: |
| 1745 | |
| 1746 | >>> failure.test is test |
| 1747 | True |
| 1748 | |
| 1749 | As well as to the example: |
| 1750 | |
| 1751 | >>> failure.example.want |
| 1752 | '2\n' |
| 1753 | |
| 1754 | and the actual output: |
| 1755 | |
| 1756 | >>> failure.got |
| 1757 | '1\n' |
| 1758 | |
| 1759 | If a failure or error occurs, the globals are left intact: |
| 1760 | |
| 1761 | >>> del test.globs['__builtins__'] |
| 1762 | >>> test.globs |
| 1763 | {'x': 1} |
| 1764 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 1765 | >>> test = DocTestParser().get_doctest(''' |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1766 | ... >>> x = 2 |
| 1767 | ... >>> raise KeyError |
| 1768 | ... ''', {}, 'foo', 'foo.py', 0) |
| 1769 | |
| 1770 | >>> runner.run(test) |
| 1771 | Traceback (most recent call last): |
| 1772 | ... |
Guido van Rossum | 6a2a2a0 | 2006-08-26 20:37:44 +0000 | [diff] [blame] | 1773 | doctest.UnexpectedException: <DocTest foo from foo.py:0 (2 examples)> |
Tim Peters | d1b7827 | 2004-08-07 06:03:09 +0000 | [diff] [blame] | 1774 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1775 | >>> del test.globs['__builtins__'] |
| 1776 | >>> test.globs |
| 1777 | {'x': 2} |
| 1778 | |
| 1779 | But the globals are cleared if there is no error: |
| 1780 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 1781 | >>> test = DocTestParser().get_doctest(''' |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1782 | ... >>> x = 2 |
| 1783 | ... ''', {}, 'foo', 'foo.py', 0) |
| 1784 | |
| 1785 | >>> runner.run(test) |
Christian Heimes | 25bb783 | 2008-01-11 16:17:00 +0000 | [diff] [blame] | 1786 | TestResults(failed=0, attempted=1) |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1787 | |
| 1788 | >>> test.globs |
| 1789 | {} |
| 1790 | |
| 1791 | """ |
| 1792 | |
| 1793 | def run(self, test, compileflags=None, out=None, clear_globs=True): |
| 1794 | r = DocTestRunner.run(self, test, compileflags, out, False) |
| 1795 | if clear_globs: |
| 1796 | test.globs.clear() |
| 1797 | return r |
| 1798 | |
| 1799 | def report_unexpected_exception(self, out, test, example, exc_info): |
| 1800 | raise UnexpectedException(test, example, exc_info) |
| 1801 | |
| 1802 | def report_failure(self, out, test, example, got): |
| 1803 | raise DocTestFailure(test, example, got) |
| 1804 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1805 | ###################################################################### |
Edward Loper | 7c74846 | 2004-08-09 02:06:06 +0000 | [diff] [blame] | 1806 | ## 6. Test Functions |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1807 | ###################################################################### |
| 1808 | # These should be backwards compatible. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1809 | |
Tim Peters | 82076ef | 2004-09-13 00:52:51 +0000 | [diff] [blame] | 1810 | # For backward compatibility, a global instance of a DocTestRunner |
| 1811 | # class, updated by testmod. |
| 1812 | master = None |
| 1813 | |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 1814 | def testmod(m=None, name=None, globs=None, verbose=None, |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1815 | report=True, optionflags=0, extraglobs=None, |
Tim Peters | 958cc89 | 2004-09-13 14:53:28 +0000 | [diff] [blame] | 1816 | raise_on_error=False, exclude_empty=False): |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 1817 | """m=None, name=None, globs=None, verbose=None, report=True, |
| 1818 | optionflags=0, extraglobs=None, raise_on_error=False, |
Tim Peters | 958cc89 | 2004-09-13 14:53:28 +0000 | [diff] [blame] | 1819 | exclude_empty=False |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1820 | |
Martin v. Löwis | 4581cfa | 2002-11-22 08:23:09 +0000 | [diff] [blame] | 1821 | Test examples in docstrings in functions and classes reachable |
| 1822 | from module m (or the current module if m is not supplied), starting |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 1823 | with m.__doc__. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1824 | |
| 1825 | Also test examples reachable from dict m.__test__ if it exists and is |
Tim Peters | c2388a2 | 2004-08-10 01:41:28 +0000 | [diff] [blame] | 1826 | not None. m.__test__ maps names to functions, classes and strings; |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1827 | function and class docstrings are tested even if the name is private; |
| 1828 | strings are tested directly, as if they were docstrings. |
| 1829 | |
| 1830 | Return (#failures, #tests). |
| 1831 | |
Alexander Belopolsky | 977a684 | 2010-08-16 20:17:07 +0000 | [diff] [blame] | 1832 | See help(doctest) for an overview. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1833 | |
| 1834 | Optional keyword arg "name" gives the name of the module; by default |
| 1835 | use m.__name__. |
| 1836 | |
| 1837 | Optional keyword arg "globs" gives a dict to be used as the globals |
| 1838 | when executing examples; by default, use m.__dict__. A copy of this |
| 1839 | dict is actually used for each docstring, so that each docstring's |
| 1840 | examples start with a clean slate. |
| 1841 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1842 | Optional keyword arg "extraglobs" gives a dictionary that should be |
| 1843 | merged into the globals that are used to execute examples. By |
| 1844 | default, no extra globals are used. This is new in 2.4. |
| 1845 | |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1846 | Optional keyword arg "verbose" prints lots of stuff if true, prints |
| 1847 | only failures if false; by default, it's true iff "-v" is in sys.argv. |
| 1848 | |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1849 | Optional keyword arg "report" prints a summary at the end when true, |
| 1850 | else prints nothing at the end. In verbose mode, the summary is |
| 1851 | detailed, else very brief (in fact, empty if all tests passed). |
| 1852 | |
Tim Peters | 6ebe61f | 2003-06-27 20:48:05 +0000 | [diff] [blame] | 1853 | Optional keyword arg "optionflags" or's together module constants, |
Tim Peters | f82a9de | 2004-08-22 20:51:53 +0000 | [diff] [blame] | 1854 | and defaults to 0. This is new in 2.3. Possible values (see the |
| 1855 | docs for details): |
Tim Peters | 6ebe61f | 2003-06-27 20:48:05 +0000 | [diff] [blame] | 1856 | |
| 1857 | DONT_ACCEPT_TRUE_FOR_1 |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1858 | DONT_ACCEPT_BLANKLINE |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1859 | NORMALIZE_WHITESPACE |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1860 | ELLIPSIS |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 1861 | SKIP |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 1862 | IGNORE_EXCEPTION_DETAIL |
Edward Loper | 71f55af | 2004-08-26 01:41:51 +0000 | [diff] [blame] | 1863 | REPORT_UDIFF |
| 1864 | REPORT_CDIFF |
| 1865 | REPORT_NDIFF |
Edward Loper | a89f88d | 2004-08-26 02:45:51 +0000 | [diff] [blame] | 1866 | REPORT_ONLY_FIRST_FAILURE |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1867 | |
| 1868 | Optional keyword arg "raise_on_error" raises an exception on the |
| 1869 | first unexpected exception or failure. This allows failures to be |
| 1870 | post-mortem debugged. |
| 1871 | |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1872 | Advanced tomfoolery: testmod runs methods of a local instance of |
| 1873 | class doctest.Tester, then merges the results into (or creates) |
| 1874 | global Tester instance doctest.master. Methods of doctest.master |
| 1875 | can be called directly too, if you want to do something unusual. |
| 1876 | Passing report=0 to testmod is especially useful then, to delay |
| 1877 | displaying a summary. Invoke doctest.master.summarize(verbose) |
| 1878 | when you're done fiddling. |
| 1879 | """ |
Tim Peters | 82076ef | 2004-09-13 00:52:51 +0000 | [diff] [blame] | 1880 | global master |
| 1881 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1882 | # If no module was given, then use __main__. |
Martin v. Löwis | 4581cfa | 2002-11-22 08:23:09 +0000 | [diff] [blame] | 1883 | if m is None: |
Martin v. Löwis | 4581cfa | 2002-11-22 08:23:09 +0000 | [diff] [blame] | 1884 | # DWA - m will still be None if this wasn't invoked from the command |
| 1885 | # line, in which case the following TypeError is about as good an error |
| 1886 | # as we should expect |
| 1887 | m = sys.modules.get('__main__') |
| 1888 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1889 | # Check that we were actually given a module. |
| 1890 | if not inspect.ismodule(m): |
Walter Dörwald | 70a6b49 | 2004-02-12 17:35:32 +0000 | [diff] [blame] | 1891 | raise TypeError("testmod: module required; %r" % (m,)) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1892 | |
| 1893 | # If no name was given, then use the module's name. |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1894 | if name is None: |
| 1895 | name = m.__name__ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1896 | |
| 1897 | # Find, parse, and run all tests in the given module. |
Thomas Wouters | 73e5a5b | 2006-06-08 15:35:45 +0000 | [diff] [blame] | 1898 | finder = DocTestFinder(exclude_empty=exclude_empty) |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 1899 | |
| 1900 | if raise_on_error: |
| 1901 | runner = DebugRunner(verbose=verbose, optionflags=optionflags) |
| 1902 | else: |
| 1903 | runner = DocTestRunner(verbose=verbose, optionflags=optionflags) |
| 1904 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1905 | for test in finder.find(m, name, globs=globs, extraglobs=extraglobs): |
| 1906 | runner.run(test) |
| 1907 | |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1908 | if report: |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 1909 | runner.summarize() |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 1910 | |
Tim Peters | 82076ef | 2004-09-13 00:52:51 +0000 | [diff] [blame] | 1911 | if master is None: |
| 1912 | master = runner |
| 1913 | else: |
| 1914 | master.merge(runner) |
| 1915 | |
Christian Heimes | 25bb783 | 2008-01-11 16:17:00 +0000 | [diff] [blame] | 1916 | return TestResults(runner.failures, runner.tries) |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 1917 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 1918 | def testfile(filename, module_relative=True, name=None, package=None, |
| 1919 | globs=None, verbose=None, report=True, optionflags=0, |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 1920 | extraglobs=None, raise_on_error=False, parser=DocTestParser(), |
| 1921 | encoding=None): |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 1922 | """ |
| 1923 | Test examples in the given file. Return (#failures, #tests). |
| 1924 | |
| 1925 | Optional keyword arg "module_relative" specifies how filenames |
| 1926 | should be interpreted: |
| 1927 | |
| 1928 | - If "module_relative" is True (the default), then "filename" |
| 1929 | specifies a module-relative path. By default, this path is |
| 1930 | relative to the calling module's directory; but if the |
| 1931 | "package" argument is specified, then it is relative to that |
| 1932 | package. To ensure os-independence, "filename" should use |
| 1933 | "/" characters to separate path segments, and should not |
| 1934 | be an absolute path (i.e., it may not begin with "/"). |
| 1935 | |
| 1936 | - If "module_relative" is False, then "filename" specifies an |
| 1937 | os-specific path. The path may be absolute or relative (to |
| 1938 | the current working directory). |
| 1939 | |
Edward Loper | a2fc7ec | 2004-09-21 03:24:24 +0000 | [diff] [blame] | 1940 | Optional keyword arg "name" gives the name of the test; by default |
| 1941 | use the file's basename. |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 1942 | |
| 1943 | Optional keyword argument "package" is a Python package or the |
| 1944 | name of a Python package whose directory should be used as the |
| 1945 | base directory for a module relative filename. If no package is |
| 1946 | specified, then the calling module's directory is used as the base |
| 1947 | directory for module relative filenames. It is an error to |
| 1948 | specify "package" if "module_relative" is False. |
| 1949 | |
| 1950 | Optional keyword arg "globs" gives a dict to be used as the globals |
| 1951 | when executing examples; by default, use {}. A copy of this dict |
| 1952 | is actually used for each docstring, so that each docstring's |
| 1953 | examples start with a clean slate. |
| 1954 | |
| 1955 | Optional keyword arg "extraglobs" gives a dictionary that should be |
| 1956 | merged into the globals that are used to execute examples. By |
| 1957 | default, no extra globals are used. |
| 1958 | |
| 1959 | Optional keyword arg "verbose" prints lots of stuff if true, prints |
| 1960 | only failures if false; by default, it's true iff "-v" is in sys.argv. |
| 1961 | |
| 1962 | Optional keyword arg "report" prints a summary at the end when true, |
| 1963 | else prints nothing at the end. In verbose mode, the summary is |
| 1964 | detailed, else very brief (in fact, empty if all tests passed). |
| 1965 | |
| 1966 | Optional keyword arg "optionflags" or's together module constants, |
| 1967 | and defaults to 0. Possible values (see the docs for details): |
| 1968 | |
| 1969 | DONT_ACCEPT_TRUE_FOR_1 |
| 1970 | DONT_ACCEPT_BLANKLINE |
| 1971 | NORMALIZE_WHITESPACE |
| 1972 | ELLIPSIS |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 1973 | SKIP |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 1974 | IGNORE_EXCEPTION_DETAIL |
| 1975 | REPORT_UDIFF |
| 1976 | REPORT_CDIFF |
| 1977 | REPORT_NDIFF |
| 1978 | REPORT_ONLY_FIRST_FAILURE |
| 1979 | |
| 1980 | Optional keyword arg "raise_on_error" raises an exception on the |
| 1981 | first unexpected exception or failure. This allows failures to be |
| 1982 | post-mortem debugged. |
| 1983 | |
Edward Loper | 498a186 | 2004-09-27 03:42:58 +0000 | [diff] [blame] | 1984 | Optional keyword arg "parser" specifies a DocTestParser (or |
| 1985 | subclass) that should be used to extract tests from the files. |
| 1986 | |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 1987 | Optional keyword arg "encoding" specifies an encoding that should |
| 1988 | be used to convert the file to unicode. |
| 1989 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 1990 | Advanced tomfoolery: testmod runs methods of a local instance of |
| 1991 | class doctest.Tester, then merges the results into (or creates) |
| 1992 | global Tester instance doctest.master. Methods of doctest.master |
| 1993 | can be called directly too, if you want to do something unusual. |
| 1994 | Passing report=0 to testmod is especially useful then, to delay |
| 1995 | displaying a summary. Invoke doctest.master.summarize(verbose) |
| 1996 | when you're done fiddling. |
| 1997 | """ |
| 1998 | global master |
| 1999 | |
| 2000 | if package and not module_relative: |
| 2001 | raise ValueError("Package may only be specified for module-" |
| 2002 | "relative paths.") |
Tim Peters | bab3e99 | 2004-09-20 19:52:34 +0000 | [diff] [blame] | 2003 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2004 | # Relativize the path |
Guido van Rossum | 1b81e7b | 2007-08-29 03:53:53 +0000 | [diff] [blame] | 2005 | text, filename = _load_testfile(filename, package, module_relative, |
| 2006 | encoding or "utf-8") |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2007 | |
| 2008 | # If no name was given, then use the file's name. |
| 2009 | if name is None: |
Edward Loper | a2fc7ec | 2004-09-21 03:24:24 +0000 | [diff] [blame] | 2010 | name = os.path.basename(filename) |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2011 | |
| 2012 | # Assemble the globals. |
| 2013 | if globs is None: |
| 2014 | globs = {} |
| 2015 | else: |
| 2016 | globs = globs.copy() |
| 2017 | if extraglobs is not None: |
| 2018 | globs.update(extraglobs) |
Raymond Hettinger | 0f05517 | 2009-01-27 10:06:09 +0000 | [diff] [blame] | 2019 | if '__name__' not in globs: |
| 2020 | globs['__name__'] = '__main__' |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2021 | |
| 2022 | if raise_on_error: |
| 2023 | runner = DebugRunner(verbose=verbose, optionflags=optionflags) |
| 2024 | else: |
| 2025 | runner = DocTestRunner(verbose=verbose, optionflags=optionflags) |
| 2026 | |
| 2027 | # Read the file, convert it to a test, and run it. |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2028 | test = parser.get_doctest(text, globs, name, filename, 0) |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2029 | runner.run(test) |
| 2030 | |
| 2031 | if report: |
| 2032 | runner.summarize() |
| 2033 | |
| 2034 | if master is None: |
| 2035 | master = runner |
| 2036 | else: |
| 2037 | master.merge(runner) |
| 2038 | |
Christian Heimes | 25bb783 | 2008-01-11 16:17:00 +0000 | [diff] [blame] | 2039 | return TestResults(runner.failures, runner.tries) |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2040 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2041 | def run_docstring_examples(f, globs, verbose=False, name="NoName", |
| 2042 | compileflags=None, optionflags=0): |
| 2043 | """ |
| 2044 | Test examples in the given object's docstring (`f`), using `globs` |
| 2045 | as globals. Optional argument `name` is used in failure messages. |
| 2046 | If the optional argument `verbose` is true, then generate output |
| 2047 | even if there are no failures. |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2048 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2049 | `compileflags` gives the set of flags that should be used by the |
| 2050 | Python compiler when running the examples. If not specified, then |
| 2051 | it will default to the set of future-import flags that apply to |
| 2052 | `globs`. |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2053 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2054 | Optional keyword arg `optionflags` specifies options for the |
| 2055 | testing and output. See the documentation for `testmod` for more |
| 2056 | information. |
| 2057 | """ |
| 2058 | # Find, parse, and run all tests in the given module. |
| 2059 | finder = DocTestFinder(verbose=verbose, recurse=False) |
| 2060 | runner = DocTestRunner(verbose=verbose, optionflags=optionflags) |
| 2061 | for test in finder.find(f, name, globs=globs): |
| 2062 | runner.run(test, compileflags=compileflags) |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2063 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2064 | ###################################################################### |
Georg Brandl | 3183585 | 2008-05-12 17:38:56 +0000 | [diff] [blame] | 2065 | ## 7. Unittest Support |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2066 | ###################################################################### |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2067 | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2068 | _unittest_reportflags = 0 |
Tim Peters | 38330fe | 2004-08-30 16:19:24 +0000 | [diff] [blame] | 2069 | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2070 | def set_unittest_reportflags(flags): |
Tim Peters | 38330fe | 2004-08-30 16:19:24 +0000 | [diff] [blame] | 2071 | """Sets the unittest option flags. |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2072 | |
| 2073 | The old flag is returned so that a runner could restore the old |
| 2074 | value if it wished to: |
| 2075 | |
Tim Peters | b7e99b6 | 2005-03-28 23:50:54 +0000 | [diff] [blame] | 2076 | >>> import doctest |
| 2077 | >>> old = doctest._unittest_reportflags |
| 2078 | >>> doctest.set_unittest_reportflags(REPORT_NDIFF | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2079 | ... REPORT_ONLY_FIRST_FAILURE) == old |
| 2080 | True |
| 2081 | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2082 | >>> doctest._unittest_reportflags == (REPORT_NDIFF | |
| 2083 | ... REPORT_ONLY_FIRST_FAILURE) |
| 2084 | True |
Tim Peters | df7a208 | 2004-08-29 00:38:17 +0000 | [diff] [blame] | 2085 | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2086 | Only reporting flags can be set: |
| 2087 | |
Tim Peters | b7e99b6 | 2005-03-28 23:50:54 +0000 | [diff] [blame] | 2088 | >>> doctest.set_unittest_reportflags(ELLIPSIS) |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2089 | Traceback (most recent call last): |
| 2090 | ... |
Tim Peters | 38330fe | 2004-08-30 16:19:24 +0000 | [diff] [blame] | 2091 | ValueError: ('Only reporting flags allowed', 8) |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2092 | |
Tim Peters | b7e99b6 | 2005-03-28 23:50:54 +0000 | [diff] [blame] | 2093 | >>> doctest.set_unittest_reportflags(old) == (REPORT_NDIFF | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2094 | ... REPORT_ONLY_FIRST_FAILURE) |
| 2095 | True |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2096 | """ |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2097 | global _unittest_reportflags |
Tim Peters | 38330fe | 2004-08-30 16:19:24 +0000 | [diff] [blame] | 2098 | |
| 2099 | if (flags & REPORTING_FLAGS) != flags: |
| 2100 | raise ValueError("Only reporting flags allowed", flags) |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2101 | old = _unittest_reportflags |
| 2102 | _unittest_reportflags = flags |
| 2103 | return old |
Tim Peters | df7a208 | 2004-08-29 00:38:17 +0000 | [diff] [blame] | 2104 | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2105 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2106 | class DocTestCase(unittest.TestCase): |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2107 | |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 2108 | def __init__(self, test, optionflags=0, setUp=None, tearDown=None, |
| 2109 | checker=None): |
Jim Fulton | 07a349c | 2004-08-22 14:10:00 +0000 | [diff] [blame] | 2110 | |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2111 | unittest.TestCase.__init__(self) |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2112 | self._dt_optionflags = optionflags |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 2113 | self._dt_checker = checker |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2114 | self._dt_test = test |
| 2115 | self._dt_setUp = setUp |
| 2116 | self._dt_tearDown = tearDown |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2117 | |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2118 | def setUp(self): |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2119 | test = self._dt_test |
Tim Peters | df7a208 | 2004-08-29 00:38:17 +0000 | [diff] [blame] | 2120 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2121 | if self._dt_setUp is not None: |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2122 | self._dt_setUp(test) |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2123 | |
| 2124 | def tearDown(self): |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2125 | test = self._dt_test |
| 2126 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2127 | if self._dt_tearDown is not None: |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2128 | self._dt_tearDown(test) |
| 2129 | |
| 2130 | test.globs.clear() |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2131 | |
| 2132 | def runTest(self): |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2133 | test = self._dt_test |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2134 | old = sys.stdout |
| 2135 | new = StringIO() |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2136 | optionflags = self._dt_optionflags |
Tim Peters | df7a208 | 2004-08-29 00:38:17 +0000 | [diff] [blame] | 2137 | |
Tim Peters | 38330fe | 2004-08-30 16:19:24 +0000 | [diff] [blame] | 2138 | if not (optionflags & REPORTING_FLAGS): |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2139 | # The option flags don't include any reporting flags, |
| 2140 | # so add the default reporting flags |
| 2141 | optionflags |= _unittest_reportflags |
Tim Peters | df7a208 | 2004-08-29 00:38:17 +0000 | [diff] [blame] | 2142 | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2143 | runner = DocTestRunner(optionflags=optionflags, |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 2144 | checker=self._dt_checker, verbose=False) |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2145 | |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2146 | try: |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2147 | runner.DIVIDER = "-"*70 |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2148 | failures, tries = runner.run( |
| 2149 | test, out=new.write, clear_globs=False) |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2150 | finally: |
| 2151 | sys.stdout = old |
| 2152 | |
| 2153 | if failures: |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2154 | raise self.failureException(self.format_failure(new.getvalue())) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2155 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2156 | def format_failure(self, err): |
| 2157 | test = self._dt_test |
| 2158 | if test.lineno is None: |
| 2159 | lineno = 'unknown line number' |
| 2160 | else: |
Jim Fulton | 07a349c | 2004-08-22 14:10:00 +0000 | [diff] [blame] | 2161 | lineno = '%s' % test.lineno |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2162 | lname = '.'.join(test.name.split('.')[-1:]) |
| 2163 | return ('Failed doctest test for %s\n' |
| 2164 | ' File "%s", line %s, in %s\n\n%s' |
| 2165 | % (test.name, test.filename, lineno, lname, err) |
| 2166 | ) |
| 2167 | |
| 2168 | def debug(self): |
| 2169 | r"""Run the test case without results and without catching exceptions |
| 2170 | |
| 2171 | The unit test framework includes a debug method on test cases |
| 2172 | and test suites to support post-mortem debugging. The test code |
| 2173 | is run in such a way that errors are not caught. This way a |
| 2174 | caller can catch the errors and initiate post-mortem debugging. |
| 2175 | |
| 2176 | The DocTestCase provides a debug method that raises |
Ezio Melotti | 1392500 | 2011-03-16 11:05:33 +0200 | [diff] [blame] | 2177 | UnexpectedException errors if there is an unexpected |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2178 | exception: |
| 2179 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 2180 | >>> test = DocTestParser().get_doctest('>>> raise KeyError\n42', |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2181 | ... {}, 'foo', 'foo.py', 0) |
| 2182 | >>> case = DocTestCase(test) |
| 2183 | >>> try: |
| 2184 | ... case.debug() |
Guido van Rossum | b940e11 | 2007-01-10 16:19:56 +0000 | [diff] [blame] | 2185 | ... except UnexpectedException as f: |
| 2186 | ... failure = f |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2187 | |
| 2188 | The UnexpectedException contains the test, the example, and |
| 2189 | the original exception: |
| 2190 | |
| 2191 | >>> failure.test is test |
| 2192 | True |
| 2193 | |
| 2194 | >>> failure.example.want |
| 2195 | '42\n' |
| 2196 | |
| 2197 | >>> exc_info = failure.exc_info |
Collin Winter | 828f04a | 2007-08-31 00:04:24 +0000 | [diff] [blame] | 2198 | >>> raise exc_info[1] # Already has the traceback |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2199 | Traceback (most recent call last): |
| 2200 | ... |
| 2201 | KeyError |
| 2202 | |
| 2203 | If the output doesn't match, then a DocTestFailure is raised: |
| 2204 | |
Edward Loper | a1ef611 | 2004-08-09 16:14:41 +0000 | [diff] [blame] | 2205 | >>> test = DocTestParser().get_doctest(''' |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2206 | ... >>> x = 1 |
| 2207 | ... >>> x |
| 2208 | ... 2 |
| 2209 | ... ''', {}, 'foo', 'foo.py', 0) |
| 2210 | >>> case = DocTestCase(test) |
| 2211 | |
| 2212 | >>> try: |
| 2213 | ... case.debug() |
Guido van Rossum | b940e11 | 2007-01-10 16:19:56 +0000 | [diff] [blame] | 2214 | ... except DocTestFailure as f: |
| 2215 | ... failure = f |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2216 | |
| 2217 | DocTestFailure objects provide access to the test: |
| 2218 | |
| 2219 | >>> failure.test is test |
| 2220 | True |
| 2221 | |
| 2222 | As well as to the example: |
| 2223 | |
| 2224 | >>> failure.example.want |
| 2225 | '2\n' |
| 2226 | |
| 2227 | and the actual output: |
| 2228 | |
| 2229 | >>> failure.got |
| 2230 | '1\n' |
| 2231 | |
| 2232 | """ |
| 2233 | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2234 | self.setUp() |
Edward Loper | 34fcb14 | 2004-08-09 02:45:41 +0000 | [diff] [blame] | 2235 | runner = DebugRunner(optionflags=self._dt_optionflags, |
| 2236 | checker=self._dt_checker, verbose=False) |
Alexandre Vassalotti | eca20b6 | 2008-05-16 02:54:33 +0000 | [diff] [blame] | 2237 | runner.run(self._dt_test, clear_globs=False) |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2238 | self.tearDown() |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2239 | |
| 2240 | def id(self): |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2241 | return self._dt_test.name |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2242 | |
Antoine Pitrou | 2bc801c | 2011-12-18 19:27:45 +0100 | [diff] [blame] | 2243 | def __eq__(self, other): |
| 2244 | if type(self) is not type(other): |
| 2245 | return NotImplemented |
| 2246 | |
| 2247 | return self._dt_test == other._dt_test and \ |
| 2248 | self._dt_optionflags == other._dt_optionflags and \ |
| 2249 | self._dt_setUp == other._dt_setUp and \ |
| 2250 | self._dt_tearDown == other._dt_tearDown and \ |
| 2251 | self._dt_checker == other._dt_checker |
| 2252 | |
| 2253 | def __ne__(self, other): |
| 2254 | return not self == other |
| 2255 | |
Antoine Pitrou | 165b128 | 2011-12-18 20:20:17 +0100 | [diff] [blame] | 2256 | def __hash__(self): |
| 2257 | return hash((self._dt_optionflags, self._dt_setUp, self._dt_tearDown, |
| 2258 | self._dt_checker)) |
| 2259 | |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2260 | def __repr__(self): |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2261 | name = self._dt_test.name.split('.') |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2262 | return "%s (%s)" % (name[-1], '.'.join(name[:-1])) |
| 2263 | |
| 2264 | __str__ = __repr__ |
| 2265 | |
| 2266 | def shortDescription(self): |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2267 | return "Doctest: " + self._dt_test.name |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2268 | |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 2269 | class SkipDocTestCase(DocTestCase): |
R David Murray | e112153 | 2012-03-21 14:53:42 -0400 | [diff] [blame] | 2270 | def __init__(self, module): |
| 2271 | self.module = module |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 2272 | DocTestCase.__init__(self, None) |
| 2273 | |
| 2274 | def setUp(self): |
| 2275 | self.skipTest("DocTestSuite will not work with -O2 and above") |
| 2276 | |
| 2277 | def test_skip(self): |
| 2278 | pass |
| 2279 | |
| 2280 | def shortDescription(self): |
R David Murray | e112153 | 2012-03-21 14:53:42 -0400 | [diff] [blame] | 2281 | return "Skipping tests from %s" % self.module.__name__ |
| 2282 | |
| 2283 | __str__ = shortDescription |
| 2284 | |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 2285 | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2286 | def DocTestSuite(module=None, globs=None, extraglobs=None, test_finder=None, |
| 2287 | **options): |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2288 | """ |
Tim Peters | 75dc5e1 | 2004-08-22 17:50:45 +0000 | [diff] [blame] | 2289 | Convert doctest tests for a module to a unittest test suite. |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2290 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2291 | This converts each documentation string in a module that |
| 2292 | contains doctest tests to a unittest test case. If any of the |
| 2293 | tests in a doc string fail, then the test case fails. An exception |
| 2294 | is raised showing the name of the file containing the test and a |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2295 | (sometimes approximate) line number. |
| 2296 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2297 | The `module` argument provides the module to be tested. The argument |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2298 | can be either a module or a module name. |
| 2299 | |
| 2300 | If no argument is given, the calling module is used. |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2301 | |
| 2302 | A number of options may be provided as keyword arguments: |
| 2303 | |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2304 | setUp |
Edward Loper | a2fc7ec | 2004-09-21 03:24:24 +0000 | [diff] [blame] | 2305 | A set-up function. This is called before running the |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2306 | tests in each file. The setUp function will be passed a DocTest |
| 2307 | object. The setUp function can access the test globals as the |
| 2308 | globs attribute of the test passed. |
| 2309 | |
| 2310 | tearDown |
Edward Loper | a2fc7ec | 2004-09-21 03:24:24 +0000 | [diff] [blame] | 2311 | A tear-down function. This is called after running the |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2312 | tests in each file. The tearDown function will be passed a DocTest |
| 2313 | object. The tearDown function can access the test globals as the |
| 2314 | globs attribute of the test passed. |
| 2315 | |
| 2316 | globs |
| 2317 | A dictionary containing initial global variables for the tests. |
| 2318 | |
| 2319 | optionflags |
| 2320 | A set of doctest option flags expressed as an integer. |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2321 | """ |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2322 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2323 | if test_finder is None: |
| 2324 | test_finder = DocTestFinder() |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2325 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2326 | module = _normalize_module(module) |
| 2327 | tests = test_finder.find(module, globs=globs, extraglobs=extraglobs) |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 2328 | |
| 2329 | if not tests and sys.flags.optimize >=2: |
| 2330 | # Skip doctests when running with -O2 |
| 2331 | suite = unittest.TestSuite() |
R David Murray | e112153 | 2012-03-21 14:53:42 -0400 | [diff] [blame] | 2332 | suite.addTest(SkipDocTestCase(module)) |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 2333 | return suite |
| 2334 | elif not tests: |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2335 | # Why do we want to do this? Because it reveals a bug that might |
| 2336 | # otherwise be hidden. |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2337 | raise ValueError(module, "has no tests") |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2338 | |
| 2339 | tests.sort() |
| 2340 | suite = unittest.TestSuite() |
R. David Murray | 378c0cf | 2010-02-24 01:46:21 +0000 | [diff] [blame] | 2341 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2342 | for test in tests: |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2343 | if len(test.examples) == 0: |
| 2344 | continue |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2345 | if not test.filename: |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2346 | filename = module.__file__ |
Jim Fulton | 07a349c | 2004-08-22 14:10:00 +0000 | [diff] [blame] | 2347 | if filename[-4:] in (".pyc", ".pyo"): |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2348 | filename = filename[:-1] |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2349 | test.filename = filename |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2350 | suite.addTest(DocTestCase(test, **options)) |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2351 | |
| 2352 | return suite |
| 2353 | |
| 2354 | class DocFileCase(DocTestCase): |
| 2355 | |
| 2356 | def id(self): |
| 2357 | return '_'.join(self._dt_test.name.split('.')) |
| 2358 | |
| 2359 | def __repr__(self): |
| 2360 | return self._dt_test.filename |
| 2361 | __str__ = __repr__ |
| 2362 | |
| 2363 | def format_failure(self, err): |
| 2364 | return ('Failed doctest test for %s\n File "%s", line 0\n\n%s' |
| 2365 | % (self._dt_test.name, self._dt_test.filename, err) |
| 2366 | ) |
| 2367 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2368 | def DocFileTest(path, module_relative=True, package=None, |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 2369 | globs=None, parser=DocTestParser(), |
| 2370 | encoding=None, **options): |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2371 | if globs is None: |
| 2372 | globs = {} |
Fred Drake | 7c404a4 | 2004-12-21 23:46:34 +0000 | [diff] [blame] | 2373 | else: |
| 2374 | globs = globs.copy() |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2375 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2376 | if package and not module_relative: |
| 2377 | raise ValueError("Package may only be specified for module-" |
| 2378 | "relative paths.") |
Tim Peters | bab3e99 | 2004-09-20 19:52:34 +0000 | [diff] [blame] | 2379 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2380 | # Relativize the path. |
Guido van Rossum | 1b81e7b | 2007-08-29 03:53:53 +0000 | [diff] [blame] | 2381 | doc, path = _load_testfile(path, package, module_relative, |
| 2382 | encoding or "utf-8") |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2383 | |
Fred Drake | 7c404a4 | 2004-12-21 23:46:34 +0000 | [diff] [blame] | 2384 | if "__file__" not in globs: |
| 2385 | globs["__file__"] = path |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2386 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2387 | # Find the file and read it. |
Edward Loper | a2fc7ec | 2004-09-21 03:24:24 +0000 | [diff] [blame] | 2388 | name = os.path.basename(path) |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2389 | |
| 2390 | # Convert it to a test, and wrap it in a DocFileCase. |
Edward Loper | 498a186 | 2004-09-27 03:42:58 +0000 | [diff] [blame] | 2391 | test = parser.get_doctest(doc, globs, name, path, 0) |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2392 | return DocFileCase(test, **options) |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2393 | |
| 2394 | def DocFileSuite(*paths, **kw): |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2395 | """A unittest suite for one or more doctest files. |
Tim Peters | bab3e99 | 2004-09-20 19:52:34 +0000 | [diff] [blame] | 2396 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2397 | The path to each doctest file is given as a string; the |
| 2398 | interpretation of that string depends on the keyword argument |
| 2399 | "module_relative". |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2400 | |
| 2401 | A number of options may be provided as keyword arguments: |
| 2402 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2403 | module_relative |
| 2404 | If "module_relative" is True, then the given file paths are |
| 2405 | interpreted as os-independent module-relative paths. By |
| 2406 | default, these paths are relative to the calling module's |
| 2407 | directory; but if the "package" argument is specified, then |
| 2408 | they are relative to that package. To ensure os-independence, |
| 2409 | "filename" should use "/" characters to separate path |
| 2410 | segments, and may not be an absolute path (i.e., it may not |
| 2411 | begin with "/"). |
Tim Peters | bab3e99 | 2004-09-20 19:52:34 +0000 | [diff] [blame] | 2412 | |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2413 | If "module_relative" is False, then the given file paths are |
| 2414 | interpreted as os-specific paths. These paths may be absolute |
| 2415 | or relative (to the current working directory). |
| 2416 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2417 | package |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2418 | A Python package or the name of a Python package whose directory |
| 2419 | should be used as the base directory for module relative paths. |
| 2420 | If "package" is not specified, then the calling module's |
| 2421 | directory is used as the base directory for module relative |
| 2422 | filenames. It is an error to specify "package" if |
| 2423 | "module_relative" is False. |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2424 | |
| 2425 | setUp |
Edward Loper | a2fc7ec | 2004-09-21 03:24:24 +0000 | [diff] [blame] | 2426 | A set-up function. This is called before running the |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2427 | tests in each file. The setUp function will be passed a DocTest |
| 2428 | object. The setUp function can access the test globals as the |
| 2429 | globs attribute of the test passed. |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2430 | |
| 2431 | tearDown |
Edward Loper | a2fc7ec | 2004-09-21 03:24:24 +0000 | [diff] [blame] | 2432 | A tear-down function. This is called after running the |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2433 | tests in each file. The tearDown function will be passed a DocTest |
| 2434 | object. The tearDown function can access the test globals as the |
| 2435 | globs attribute of the test passed. |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2436 | |
| 2437 | globs |
| 2438 | A dictionary containing initial global variables for the tests. |
Jim Fulton | f54bad4 | 2004-08-28 14:57:56 +0000 | [diff] [blame] | 2439 | |
| 2440 | optionflags |
Edward Loper | 498a186 | 2004-09-27 03:42:58 +0000 | [diff] [blame] | 2441 | A set of doctest option flags expressed as an integer. |
| 2442 | |
| 2443 | parser |
| 2444 | A DocTestParser (or subclass) that should be used to extract |
| 2445 | tests from the files. |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 2446 | |
| 2447 | encoding |
| 2448 | An encoding that will be used to convert the files to unicode. |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2449 | """ |
| 2450 | suite = unittest.TestSuite() |
| 2451 | |
| 2452 | # We do this here so that _normalize_module is called at the right |
| 2453 | # level. If it were called in DocFileTest, then this function |
| 2454 | # would be the caller and we might guess the package incorrectly. |
Edward Loper | 052d0cd | 2004-09-19 17:19:33 +0000 | [diff] [blame] | 2455 | if kw.get('module_relative', True): |
| 2456 | kw['package'] = _normalize_module(kw.get('package')) |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2457 | |
| 2458 | for path in paths: |
| 2459 | suite.addTest(DocFileTest(path, **kw)) |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2460 | |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2461 | return suite |
| 2462 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2463 | ###################################################################### |
Georg Brandl | 3183585 | 2008-05-12 17:38:56 +0000 | [diff] [blame] | 2464 | ## 8. Debugging Support |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2465 | ###################################################################### |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2466 | |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2467 | def script_from_examples(s): |
| 2468 | r"""Extract script from text with examples. |
| 2469 | |
| 2470 | Converts text with examples to a Python script. Example input is |
| 2471 | converted to regular code. Example output and all other words |
| 2472 | are converted to comments: |
| 2473 | |
| 2474 | >>> text = ''' |
| 2475 | ... Here are examples of simple math. |
| 2476 | ... |
| 2477 | ... Python has super accurate integer addition |
| 2478 | ... |
| 2479 | ... >>> 2 + 2 |
| 2480 | ... 5 |
| 2481 | ... |
| 2482 | ... And very friendly error messages: |
| 2483 | ... |
| 2484 | ... >>> 1/0 |
| 2485 | ... To Infinity |
| 2486 | ... And |
| 2487 | ... Beyond |
| 2488 | ... |
| 2489 | ... You can use logic if you want: |
| 2490 | ... |
| 2491 | ... >>> if 0: |
| 2492 | ... ... blah |
| 2493 | ... ... blah |
| 2494 | ... ... |
| 2495 | ... |
| 2496 | ... Ho hum |
| 2497 | ... ''' |
| 2498 | |
Guido van Rossum | 7131f84 | 2007-02-09 20:13:25 +0000 | [diff] [blame] | 2499 | >>> print(script_from_examples(text)) |
Edward Loper | a5db600 | 2004-08-12 02:41:30 +0000 | [diff] [blame] | 2500 | # Here are examples of simple math. |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2501 | # |
Edward Loper | a5db600 | 2004-08-12 02:41:30 +0000 | [diff] [blame] | 2502 | # Python has super accurate integer addition |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2503 | # |
| 2504 | 2 + 2 |
| 2505 | # Expected: |
Edward Loper | a5db600 | 2004-08-12 02:41:30 +0000 | [diff] [blame] | 2506 | ## 5 |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2507 | # |
Edward Loper | a5db600 | 2004-08-12 02:41:30 +0000 | [diff] [blame] | 2508 | # And very friendly error messages: |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2509 | # |
| 2510 | 1/0 |
| 2511 | # Expected: |
Edward Loper | a5db600 | 2004-08-12 02:41:30 +0000 | [diff] [blame] | 2512 | ## To Infinity |
| 2513 | ## And |
| 2514 | ## Beyond |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2515 | # |
Edward Loper | a5db600 | 2004-08-12 02:41:30 +0000 | [diff] [blame] | 2516 | # You can use logic if you want: |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2517 | # |
| 2518 | if 0: |
| 2519 | blah |
| 2520 | blah |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2521 | # |
Edward Loper | a5db600 | 2004-08-12 02:41:30 +0000 | [diff] [blame] | 2522 | # Ho hum |
Georg Brandl | ecf93c7 | 2005-06-26 23:09:51 +0000 | [diff] [blame] | 2523 | <BLANKLINE> |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2524 | """ |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 2525 | output = [] |
| 2526 | for piece in DocTestParser().parse(s): |
| 2527 | if isinstance(piece, Example): |
| 2528 | # Add the example's source code (strip trailing NL) |
| 2529 | output.append(piece.source[:-1]) |
| 2530 | # Add the expected output: |
| 2531 | want = piece.want |
| 2532 | if want: |
| 2533 | output.append('# Expected:') |
| 2534 | output += ['## '+l for l in want.split('\n')[:-1]] |
| 2535 | else: |
| 2536 | # Add non-example text. |
| 2537 | output += [_comment_line(l) |
| 2538 | for l in piece.split('\n')[:-1]] |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2539 | |
Edward Loper | 00f8da7 | 2004-08-26 18:05:07 +0000 | [diff] [blame] | 2540 | # Trim junk on both ends. |
| 2541 | while output and output[-1] == '#': |
| 2542 | output.pop() |
| 2543 | while output and output[0] == '#': |
| 2544 | output.pop(0) |
| 2545 | # Combine the output, and return it. |
Georg Brandl | 1f14964 | 2005-06-26 22:22:31 +0000 | [diff] [blame] | 2546 | # Add a courtesy newline to prevent exec from choking (see bug #1172785) |
| 2547 | return '\n'.join(output) + '\n' |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2548 | |
| 2549 | def testsource(module, name): |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2550 | """Extract the test sources from a doctest docstring as a script. |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2551 | |
| 2552 | Provide the module (or dotted name of the module) containing the |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2553 | test to be debugged and the name (within the module) of the object |
| 2554 | with the doc string with tests to be debugged. |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2555 | """ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2556 | module = _normalize_module(module) |
| 2557 | tests = DocTestFinder().find(module) |
| 2558 | test = [t for t in tests if t.name == name] |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2559 | if not test: |
| 2560 | raise ValueError(name, "not found in tests") |
| 2561 | test = test[0] |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2562 | testsrc = script_from_examples(test.docstring) |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2563 | return testsrc |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2564 | |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2565 | def debug_src(src, pm=False, globs=None): |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2566 | """Debug a single doctest docstring, in argument `src`'""" |
| 2567 | testsrc = script_from_examples(src) |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2568 | debug_script(testsrc, pm, globs) |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2569 | |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2570 | def debug_script(src, pm=False, globs=None): |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2571 | "Debug a test script. `src` is the script, as a string." |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2572 | import pdb |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2573 | |
Victor Stinner | 12b8d14 | 2011-06-30 17:35:55 +0200 | [diff] [blame] | 2574 | if globs: |
| 2575 | globs = globs.copy() |
| 2576 | else: |
| 2577 | globs = {} |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2578 | |
Victor Stinner | 12b8d14 | 2011-06-30 17:35:55 +0200 | [diff] [blame] | 2579 | if pm: |
| 2580 | try: |
| 2581 | exec(src, globs, globs) |
| 2582 | except: |
| 2583 | print(sys.exc_info()[1]) |
| 2584 | p = pdb.Pdb(nosigint=True) |
| 2585 | p.reset() |
| 2586 | p.interaction(None, sys.exc_info()[2]) |
| 2587 | else: |
| 2588 | pdb.Pdb(nosigint=True).run("exec(%r)" % src, globs, globs) |
Tim Peters | db3756d | 2003-06-29 05:30:48 +0000 | [diff] [blame] | 2589 | |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2590 | def debug(module, name, pm=False): |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2591 | """Debug a single doctest docstring. |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2592 | |
| 2593 | Provide the module (or dotted name of the module) containing the |
| 2594 | test to be debugged and the name (within the module) of the object |
Tim Peters | 19397e5 | 2004-08-06 22:02:59 +0000 | [diff] [blame] | 2595 | with the docstring with tests to be debugged. |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2596 | """ |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2597 | module = _normalize_module(module) |
Jim Fulton | a643b65 | 2004-07-14 19:06:50 +0000 | [diff] [blame] | 2598 | testsrc = testsource(module, name) |
| 2599 | debug_script(testsrc, pm, module.__dict__) |
| 2600 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2601 | ###################################################################### |
Georg Brandl | 3183585 | 2008-05-12 17:38:56 +0000 | [diff] [blame] | 2602 | ## 9. Example Usage |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2603 | ###################################################################### |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 2604 | class _TestClass: |
| 2605 | """ |
| 2606 | A pointless class, for sanity-checking of docstring testing. |
| 2607 | |
| 2608 | Methods: |
| 2609 | square() |
| 2610 | get() |
| 2611 | |
| 2612 | >>> _TestClass(13).get() + _TestClass(-12).get() |
| 2613 | 1 |
| 2614 | >>> hex(_TestClass(13).square().get()) |
| 2615 | '0xa9' |
| 2616 | """ |
| 2617 | |
| 2618 | def __init__(self, val): |
| 2619 | """val -> _TestClass object with associated value val. |
| 2620 | |
| 2621 | >>> t = _TestClass(123) |
Guido van Rossum | 7131f84 | 2007-02-09 20:13:25 +0000 | [diff] [blame] | 2622 | >>> print(t.get()) |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 2623 | 123 |
| 2624 | """ |
| 2625 | |
| 2626 | self.val = val |
| 2627 | |
| 2628 | def square(self): |
| 2629 | """square() -> square TestClass's associated value |
| 2630 | |
| 2631 | >>> _TestClass(13).square().get() |
| 2632 | 169 |
| 2633 | """ |
| 2634 | |
| 2635 | self.val = self.val ** 2 |
| 2636 | return self |
| 2637 | |
| 2638 | def get(self): |
| 2639 | """get() -> return TestClass's associated value. |
| 2640 | |
| 2641 | >>> x = _TestClass(-42) |
Guido van Rossum | 7131f84 | 2007-02-09 20:13:25 +0000 | [diff] [blame] | 2642 | >>> print(x.get()) |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 2643 | -42 |
| 2644 | """ |
| 2645 | |
| 2646 | return self.val |
| 2647 | |
| 2648 | __test__ = {"_TestClass": _TestClass, |
| 2649 | "string": r""" |
| 2650 | Example of a string object, searched as-is. |
| 2651 | >>> x = 1; y = 2 |
| 2652 | >>> x + y, x * y |
| 2653 | (3, 2) |
Tim Peters | 6ebe61f | 2003-06-27 20:48:05 +0000 | [diff] [blame] | 2654 | """, |
Tim Peters | 3fa8c20 | 2004-08-23 21:43:39 +0000 | [diff] [blame] | 2655 | |
Tim Peters | 6ebe61f | 2003-06-27 20:48:05 +0000 | [diff] [blame] | 2656 | "bool-int equivalence": r""" |
| 2657 | In 2.2, boolean expressions displayed |
| 2658 | 0 or 1. By default, we still accept |
| 2659 | them. This can be disabled by passing |
| 2660 | DONT_ACCEPT_TRUE_FOR_1 to the new |
| 2661 | optionflags argument. |
| 2662 | >>> 4 == 4 |
| 2663 | 1 |
| 2664 | >>> 4 == 4 |
| 2665 | True |
| 2666 | >>> 4 > 4 |
| 2667 | 0 |
| 2668 | >>> 4 > 4 |
| 2669 | False |
| 2670 | """, |
Tim Peters | 3fa8c20 | 2004-08-23 21:43:39 +0000 | [diff] [blame] | 2671 | |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2672 | "blank lines": r""" |
Tim Peters | 3fa8c20 | 2004-08-23 21:43:39 +0000 | [diff] [blame] | 2673 | Blank lines can be marked with <BLANKLINE>: |
Guido van Rossum | 7131f84 | 2007-02-09 20:13:25 +0000 | [diff] [blame] | 2674 | >>> print('foo\n\nbar\n') |
Tim Peters | 3fa8c20 | 2004-08-23 21:43:39 +0000 | [diff] [blame] | 2675 | foo |
| 2676 | <BLANKLINE> |
| 2677 | bar |
| 2678 | <BLANKLINE> |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2679 | """, |
Tim Peters | 3fa8c20 | 2004-08-23 21:43:39 +0000 | [diff] [blame] | 2680 | |
| 2681 | "ellipsis": r""" |
| 2682 | If the ellipsis flag is used, then '...' can be used to |
| 2683 | elide substrings in the desired output: |
Guido van Rossum | 805365e | 2007-05-07 22:24:25 +0000 | [diff] [blame] | 2684 | >>> print(list(range(1000))) #doctest: +ELLIPSIS |
Tim Peters | 3fa8c20 | 2004-08-23 21:43:39 +0000 | [diff] [blame] | 2685 | [0, 1, 2, ..., 999] |
| 2686 | """, |
| 2687 | |
| 2688 | "whitespace normalization": r""" |
| 2689 | If the whitespace normalization flag is used, then |
| 2690 | differences in whitespace are ignored. |
Guido van Rossum | 805365e | 2007-05-07 22:24:25 +0000 | [diff] [blame] | 2691 | >>> print(list(range(30))) #doctest: +NORMALIZE_WHITESPACE |
Tim Peters | 3fa8c20 | 2004-08-23 21:43:39 +0000 | [diff] [blame] | 2692 | [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
| 2693 | 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, |
| 2694 | 27, 28, 29] |
| 2695 | """, |
| 2696 | } |
Tim Peters | 8485b56 | 2004-08-04 18:46:34 +0000 | [diff] [blame] | 2697 | |
R. David Murray | 445448c | 2009-12-20 17:28:31 +0000 | [diff] [blame] | 2698 | |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 2699 | def _test(): |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2700 | testfiles = [arg for arg in sys.argv[1:] if arg and arg[0] != '-'] |
R. David Murray | 445448c | 2009-12-20 17:28:31 +0000 | [diff] [blame] | 2701 | if not testfiles: |
| 2702 | name = os.path.basename(sys.argv[0]) |
R. David Murray | 0f72d6c | 2009-12-21 12:50:02 +0000 | [diff] [blame] | 2703 | if '__loader__' in globals(): # python -m |
R. David Murray | 445448c | 2009-12-20 17:28:31 +0000 | [diff] [blame] | 2704 | name, _ = os.path.splitext(name) |
| 2705 | print("usage: {0} [-v] file ...".format(name)) |
| 2706 | return 2 |
| 2707 | for filename in testfiles: |
| 2708 | if filename.endswith(".py"): |
| 2709 | # It is a module -- insert its dir into sys.path and try to |
| 2710 | # import it. If it is part of a package, that possibly |
| 2711 | # won't work because of package imports. |
| 2712 | dirname, filename = os.path.split(filename) |
| 2713 | sys.path.insert(0, dirname) |
| 2714 | m = __import__(filename[:-3]) |
| 2715 | del sys.path[0] |
| 2716 | failures, _ = testmod(m) |
| 2717 | else: |
| 2718 | failures, _ = testfile(filename, module_relative=False) |
| 2719 | if failures: |
| 2720 | return 1 |
Christian Heimes | 895627f | 2007-12-08 17:28:33 +0000 | [diff] [blame] | 2721 | return 0 |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 2722 | |
R. David Murray | 445448c | 2009-12-20 17:28:31 +0000 | [diff] [blame] | 2723 | |
Tim Peters | 8a7d2d5 | 2001-01-16 07:10:57 +0000 | [diff] [blame] | 2724 | if __name__ == "__main__": |
Christian Heimes | 895627f | 2007-12-08 17:28:33 +0000 | [diff] [blame] | 2725 | sys.exit(_test()) |