| # Module doctest. |
| # Released to the public domain 16-Jan-2001, |
| # by Tim Peters (tim.one@home.com). |
| |
| # Provided as-is; use at your own risk; no warranty; no promises; enjoy! |
| |
| """Module doctest -- a framework for running examples in docstrings. |
| |
| NORMAL USAGE |
| |
| In normal use, end each module M with: |
| |
| def _test(): |
| import doctest, M # replace M with your module's name |
| return doctest.testmod(M) # ditto |
| |
| if __name__ == "__main__": |
| _test() |
| |
| Then running the module as a script will cause the examples in the |
| docstrings to get executed and verified: |
| |
| python M.py |
| |
| This won't display anything unless an example fails, in which case the |
| failing example(s) and the cause(s) of the failure(s) are printed to stdout |
| (why not stderr? because stderr is a lame hack <0.2 wink>), and the final |
| line of output is "Test failed.". |
| |
| Run it with the -v switch instead: |
| |
| python M.py -v |
| |
| and a detailed report of all examples tried is printed to stdout, along |
| with assorted summaries at the end. |
| |
| You can force verbose mode by passing "verbose=1" to testmod, or prohibit |
| it by passing "verbose=0". In either of those cases, sys.argv is not |
| examined by testmod. |
| |
| In any case, testmod returns a 2-tuple of ints (f, t), where f is the |
| number of docstring examples that failed and t is the total number of |
| docstring examples attempted. |
| |
| |
| WHICH DOCSTRINGS ARE EXAMINED? |
| |
| + M.__doc__. |
| |
| + f.__doc__ for all functions f in M.__dict__.values(), except those |
| with private names and those defined in other modules. |
| |
| + C.__doc__ for all classes C in M.__dict__.values(), except those with |
| private names and those defined in other modules. |
| |
| + If M.__test__ exists and "is true", it must be a dict, and |
| each entry maps a (string) name to a function object, class object, or |
| string. Function and class object docstrings found from M.__test__ |
| are searched even if the name is private, and strings are searched |
| directly as if they were docstrings. In output, a key K in M.__test__ |
| appears with name |
| <name of M>.__test__.K |
| |
| Any classes found are recursively searched similarly, to test docstrings in |
| their contained methods and nested classes. Private names reached from M's |
| globals are skipped, but all names reached from M.__test__ are searched. |
| |
| By default, a name is considered to be private if it begins with an |
| underscore (like "_my_func") but doesn't both begin and end with (at least) |
| two underscores (like "__init__"). You can change the default by passing |
| your own "isprivate" function to testmod. |
| |
| If you want to test docstrings in objects with private names too, stuff |
| them into an M.__test__ dict, or see ADVANCED USAGE below (e.g., pass your |
| own isprivate function to Tester's constructor, or call the rundoc method |
| of a Tester instance). |
| |
| WHAT'S THE EXECUTION CONTEXT? |
| |
| By default, each time testmod finds a docstring to test, it uses a *copy* |
| of M's globals (so that running tests on a module doesn't change the |
| module's real globals, and so that one test in M can't leave behind crumbs |
| that accidentally allow another test to work). This means examples can |
| freely use any names defined at top-level in M. It also means that sloppy |
| imports (see above) can cause examples in external docstrings to use |
| globals inappropriate for them. |
| |
| You can force use of your own dict as the execution context by passing |
| "globs=your_dict" to testmod instead. Presumably this would be a copy of |
| M.__dict__ merged with the globals from other imported modules. |
| |
| |
| WHAT IF I WANT TO TEST A WHOLE PACKAGE? |
| |
| Piece o' cake, provided the modules do their testing from docstrings. |
| Here's the test.py I use for the world's most elaborate Rational/ |
| floating-base-conversion pkg (which I'll distribute some day): |
| |
| from Rational import Cvt |
| from Rational import Format |
| from Rational import machprec |
| from Rational import Rat |
| from Rational import Round |
| from Rational import utils |
| |
| modules = (Cvt, |
| Format, |
| machprec, |
| Rat, |
| Round, |
| utils) |
| |
| def _test(): |
| import doctest |
| import sys |
| verbose = "-v" in sys.argv |
| for mod in modules: |
| doctest.testmod(mod, verbose=verbose, report=0) |
| doctest.master.summarize() |
| |
| if __name__ == "__main__": |
| _test() |
| |
| IOW, it just runs testmod on all the pkg modules. testmod remembers the |
| names and outcomes (# of failures, # of tries) for each item it's seen, and |
| passing "report=0" prevents it from printing a summary in verbose mode. |
| Instead, the summary is delayed until all modules have been tested, and |
| then "doctest.master.summarize()" forces the summary at the end. |
| |
| So this is very nice in practice: each module can be tested individually |
| with almost no work beyond writing up docstring examples, and collections |
| of modules can be tested too as a unit with no more work than the above. |
| |
| |
| WHAT ABOUT EXCEPTIONS? |
| |
| No problem, as long as the only output generated by the example is the |
| traceback itself. For example: |
| |
| >>> [1, 2, 3].remove(42) |
| Traceback (most recent call last): |
| File "<stdin>", line 1, in ? |
| ValueError: list.remove(x): x not in list |
| >>> |
| |
| Note that only the exception type and value are compared (specifically, |
| only the last line in the traceback). |
| |
| |
| ADVANCED USAGE |
| |
| doctest.testmod() captures the testing policy I find most useful most |
| often. You may want other policies. |
| |
| testmod() actually creates a local instance of class doctest.Tester, runs |
| appropriate methods of that class, and merges the results into global |
| Tester instance doctest.master. |
| |
| You can create your own instances of doctest.Tester, and so build your own |
| policies, or even run methods of doctest.master directly. See |
| doctest.Tester.__doc__ for details. |
| |
| |
| SO WHAT DOES A DOCSTRING EXAMPLE LOOK LIKE ALREADY!? |
| |
| Oh ya. It's easy! In most cases a copy-and-paste of an interactive |
| console session works fine -- just make sure the leading whitespace is |
| rigidly consistent (you can mix tabs and spaces if you're too lazy to do it |
| right, but doctest is not in the business of guessing what you think a tab |
| means). |
| |
| >>> # comments are ignored |
| >>> x = 12 |
| >>> x |
| 12 |
| >>> if x == 13: |
| ... print "yes" |
| ... else: |
| ... print "no" |
| ... print "NO" |
| ... print "NO!!!" |
| ... |
| no |
| NO |
| NO!!! |
| >>> |
| |
| Any expected output must immediately follow the final ">>>" or "..." line |
| containing the code, and the expected output (if any) extends to the next |
| ">>>" or all-whitespace line. That's it. |
| |
| Bummers: |
| |
| + Expected output cannot contain an all-whitespace line, since such a line |
| is taken to signal the end of expected output. |
| |
| + Output to stdout is captured, but not output to stderr (exception |
| tracebacks are captured via a different means). |
| |
| + If you continue a line via backslashing in an interactive session, or for |
| any other reason use a backslash, you need to double the backslash in the |
| docstring version. This is simply because you're in a string, and so the |
| backslash must be escaped for it to survive intact. Like: |
| |
| >>> if "yes" == \\ |
| ... "y" + \\ |
| ... "es": # in the source code you'll see the doubled backslashes |
| ... print 'yes' |
| yes |
| |
| The starting column doesn't matter: |
| |
| >>> assert "Easy!" |
| >>> import math |
| >>> math.floor(1.9) |
| 1.0 |
| |
| and as many leading whitespace characters are stripped from the expected |
| output as appeared in the initial ">>>" line that triggered it. |
| |
| If you execute this very file, the examples above will be found and |
| executed, leading to this output in verbose mode: |
| |
| Running doctest.__doc__ |
| Trying: [1, 2, 3].remove(42) |
| Expecting: |
| Traceback (most recent call last): |
| File "<stdin>", line 1, in ? |
| ValueError: list.remove(x): x not in list |
| ok |
| Trying: x = 12 |
| Expecting: nothing |
| ok |
| Trying: x |
| Expecting: 12 |
| ok |
| Trying: |
| if x == 13: |
| print "yes" |
| else: |
| print "no" |
| print "NO" |
| print "NO!!!" |
| Expecting: |
| no |
| NO |
| NO!!! |
| ok |
| ... and a bunch more like that, with this summary at the end: |
| |
| 5 items had no tests: |
| doctest.Tester.__init__ |
| doctest.Tester.run__test__ |
| doctest.Tester.summarize |
| doctest.run_docstring_examples |
| doctest.testmod |
| 12 items passed all tests: |
| 8 tests in doctest |
| 6 tests in doctest.Tester |
| 10 tests in doctest.Tester.merge |
| 14 tests in doctest.Tester.rundict |
| 3 tests in doctest.Tester.rundoc |
| 3 tests in doctest.Tester.runstring |
| 2 tests in doctest.__test__._TestClass |
| 2 tests in doctest.__test__._TestClass.__init__ |
| 2 tests in doctest.__test__._TestClass.get |
| 1 tests in doctest.__test__._TestClass.square |
| 2 tests in doctest.__test__.string |
| 7 tests in doctest.is_private |
| 60 tests in 17 items. |
| 60 passed and 0 failed. |
| Test passed. |
| """ |
| |
| __all__ = [ |
| 'testmod', |
| 'run_docstring_examples', |
| 'is_private', |
| 'Tester', |
| ] |
| |
| import __future__ |
| |
| import re |
| PS1 = ">>>" |
| PS2 = "..." |
| _isPS1 = re.compile(r"(\s*)" + re.escape(PS1)).match |
| _isPS2 = re.compile(r"(\s*)" + re.escape(PS2)).match |
| _isEmpty = re.compile(r"\s*$").match |
| _isComment = re.compile(r"\s*#").match |
| del re |
| |
| from types import StringTypes as _StringTypes |
| |
| from inspect import isclass as _isclass |
| from inspect import isfunction as _isfunction |
| from inspect import ismodule as _ismodule |
| from inspect import classify_class_attrs as _classify_class_attrs |
| |
| # Extract interactive examples from a string. Return a list of triples, |
| # (source, outcome, lineno). "source" is the source code, and ends |
| # with a newline iff the source spans more than one line. "outcome" is |
| # the expected output if any, else an empty string. When not empty, |
| # outcome always ends with a newline. "lineno" is the line number, |
| # 0-based wrt the start of the string, of the first source line. |
| |
| def _extract_examples(s): |
| isPS1, isPS2 = _isPS1, _isPS2 |
| isEmpty, isComment = _isEmpty, _isComment |
| examples = [] |
| lines = s.split("\n") |
| i, n = 0, len(lines) |
| while i < n: |
| line = lines[i] |
| i = i + 1 |
| m = isPS1(line) |
| if m is None: |
| continue |
| j = m.end(0) # beyond the prompt |
| if isEmpty(line, j) or isComment(line, j): |
| # a bare prompt or comment -- not interesting |
| continue |
| lineno = i - 1 |
| if line[j] != " ": |
| raise ValueError("line " + `lineno` + " of docstring lacks " |
| "blank after " + PS1 + ": " + line) |
| j = j + 1 |
| blanks = m.group(1) |
| nblanks = len(blanks) |
| # suck up this and following PS2 lines |
| source = [] |
| while 1: |
| source.append(line[j:]) |
| line = lines[i] |
| m = isPS2(line) |
| if m: |
| if m.group(1) != blanks: |
| raise ValueError("inconsistent leading whitespace " |
| "in line " + `i` + " of docstring: " + line) |
| i = i + 1 |
| else: |
| break |
| if len(source) == 1: |
| source = source[0] |
| else: |
| # get rid of useless null line from trailing empty "..." |
| if source[-1] == "": |
| del source[-1] |
| source = "\n".join(source) + "\n" |
| # suck up response |
| if isPS1(line) or isEmpty(line): |
| expect = "" |
| else: |
| expect = [] |
| while 1: |
| if line[:nblanks] != blanks: |
| raise ValueError("inconsistent leading whitespace " |
| "in line " + `i` + " of docstring: " + line) |
| expect.append(line[nblanks:]) |
| i = i + 1 |
| line = lines[i] |
| if isPS1(line) or isEmpty(line): |
| break |
| expect = "\n".join(expect) + "\n" |
| examples.append( (source, expect, lineno) ) |
| return examples |
| |
| # Capture stdout when running examples. |
| |
| class _SpoofOut: |
| def __init__(self): |
| self.clear() |
| def write(self, s): |
| self.buf.append(s) |
| def get(self): |
| guts = "".join(self.buf) |
| # If anything at all was written, make sure there's a trailing |
| # newline. There's no way for the expected output to indicate |
| # that a trailing newline is missing. |
| if guts and not guts.endswith("\n"): |
| guts = guts + "\n" |
| # Prevent softspace from screwing up the next test case, in |
| # case they used print with a trailing comma in an example. |
| if hasattr(self, "softspace"): |
| del self.softspace |
| return guts |
| def clear(self): |
| self.buf = [] |
| if hasattr(self, "softspace"): |
| del self.softspace |
| def flush(self): |
| # JPython calls flush |
| pass |
| |
| # Display some tag-and-msg pairs nicely, keeping the tag and its msg |
| # on the same line when that makes sense. |
| |
| def _tag_out(printer, *tag_msg_pairs): |
| for tag, msg in tag_msg_pairs: |
| printer(tag + ":") |
| msg_has_nl = msg[-1:] == "\n" |
| msg_has_two_nl = msg_has_nl and \ |
| msg.find("\n") < len(msg) - 1 |
| if len(tag) + len(msg) < 76 and not msg_has_two_nl: |
| printer(" ") |
| else: |
| printer("\n") |
| printer(msg) |
| if not msg_has_nl: |
| printer("\n") |
| |
| # Run list of examples, in context globs. "out" can be used to display |
| # stuff to "the real" stdout, and fakeout is an instance of _SpoofOut |
| # that captures the examples' std output. Return (#failures, #tries). |
| |
| def _run_examples_inner(out, fakeout, examples, globs, verbose, name, |
| compileflags): |
| import sys, traceback |
| OK, BOOM, FAIL = range(3) |
| NADA = "nothing" |
| stderr = _SpoofOut() |
| failures = 0 |
| for source, want, lineno in examples: |
| if verbose: |
| _tag_out(out, ("Trying", source), |
| ("Expecting", want or NADA)) |
| fakeout.clear() |
| try: |
| exec compile(source, "<string>", "single", |
| compileflags, 1) in globs |
| got = fakeout.get() |
| state = OK |
| except KeyboardInterrupt: |
| raise |
| except: |
| # See whether the exception was expected. |
| if want.find("Traceback (innermost last):\n") == 0 or \ |
| want.find("Traceback (most recent call last):\n") == 0: |
| # Only compare exception type and value - the rest of |
| # the traceback isn't necessary. |
| want = want.split('\n')[-2] + '\n' |
| exc_type, exc_val = sys.exc_info()[:2] |
| got = traceback.format_exception_only(exc_type, exc_val)[-1] |
| state = OK |
| else: |
| # unexpected exception |
| stderr.clear() |
| traceback.print_exc(file=stderr) |
| state = BOOM |
| |
| if state == OK: |
| if got == want: |
| if verbose: |
| out("ok\n") |
| continue |
| state = FAIL |
| |
| assert state in (FAIL, BOOM) |
| failures = failures + 1 |
| out("*" * 65 + "\n") |
| _tag_out(out, ("Failure in example", source)) |
| out("from line #" + `lineno` + " of " + name + "\n") |
| if state == FAIL: |
| _tag_out(out, ("Expected", want or NADA), ("Got", got)) |
| else: |
| assert state == BOOM |
| _tag_out(out, ("Exception raised", stderr.get())) |
| |
| return failures, len(examples) |
| |
| # Get the future-flags associated with the future features that have been |
| # imported into globs. |
| |
| def _extract_future_flags(globs): |
| flags = 0 |
| for fname in __future__.all_feature_names: |
| feature = globs.get(fname, None) |
| if feature is getattr(__future__, fname): |
| flags |= feature.compiler_flag |
| return flags |
| |
| # Run list of examples, in a shallow copy of context (dict) globs. |
| # Return (#failures, #tries). |
| |
| def _run_examples(examples, globs, verbose, name, compileflags): |
| import sys |
| saveout = sys.stdout |
| globs = globs.copy() |
| try: |
| sys.stdout = fakeout = _SpoofOut() |
| x = _run_examples_inner(saveout.write, fakeout, examples, |
| globs, verbose, name, compileflags) |
| finally: |
| sys.stdout = saveout |
| # While Python gc can clean up most cycles on its own, it doesn't |
| # chase frame objects. This is especially irksome when running |
| # generator tests that raise exceptions, because a named generator- |
| # iterator gets an entry in globs, and the generator-iterator |
| # object's frame's traceback info points back to globs. This is |
| # easy to break just by clearing the namespace. This can also |
| # help to break other kinds of cycles, and even for cycles that |
| # gc can break itself it's better to break them ASAP. |
| globs.clear() |
| return x |
| |
| def run_docstring_examples(f, globs, verbose=0, name="NoName", |
| compileflags=None): |
| """f, globs, verbose=0, name="NoName" -> run examples from f.__doc__. |
| |
| Use (a shallow copy of) dict globs as the globals for execution. |
| Return (#failures, #tries). |
| |
| If optional arg verbose is true, print stuff even if there are no |
| failures. |
| Use string name in failure msgs. |
| """ |
| |
| try: |
| doc = f.__doc__ |
| if not doc: |
| # docstring empty or None |
| return 0, 0 |
| # just in case CT invents a doc object that has to be forced |
| # to look like a string <0.9 wink> |
| doc = str(doc) |
| except KeyboardInterrupt: |
| raise |
| except: |
| return 0, 0 |
| |
| e = _extract_examples(doc) |
| if not e: |
| return 0, 0 |
| if compileflags is None: |
| compileflags = _extract_future_flags(globs) |
| return _run_examples(e, globs, verbose, name, compileflags) |
| |
| def is_private(prefix, base): |
| """prefix, base -> true iff name prefix + "." + base is "private". |
| |
| Prefix may be an empty string, and base does not contain a period. |
| Prefix is ignored (although functions you write conforming to this |
| protocol may make use of it). |
| Return true iff base begins with an (at least one) underscore, but |
| does not both begin and end with (at least) two underscores. |
| |
| >>> is_private("a.b", "my_func") |
| False |
| >>> is_private("____", "_my_func") |
| True |
| >>> is_private("someclass", "__init__") |
| False |
| >>> is_private("sometypo", "__init_") |
| True |
| >>> is_private("x.y.z", "_") |
| True |
| >>> is_private("_x.y.z", "__") |
| False |
| >>> is_private("", "") # senseless but consistent |
| False |
| """ |
| |
| return base[:1] == "_" and not base[:2] == "__" == base[-2:] |
| |
| # Determine if a class of function was defined in the given module. |
| |
| def _from_module(module, object): |
| if _isfunction(object): |
| return module.__dict__ is object.func_globals |
| if _isclass(object): |
| return module.__name__ == object.__module__ |
| raise ValueError("object must be a class or function") |
| |
| class Tester: |
| """Class Tester -- runs docstring examples and accumulates stats. |
| |
| In normal use, function doctest.testmod() hides all this from you, |
| so use that if you can. Create your own instances of Tester to do |
| fancier things. |
| |
| Methods: |
| runstring(s, name) |
| Search string s for examples to run; use name for logging. |
| Return (#failures, #tries). |
| |
| rundoc(object, name=None) |
| Search object.__doc__ for examples to run; use name (or |
| object.__name__) for logging. Return (#failures, #tries). |
| |
| rundict(d, name, module=None) |
| Search for examples in docstrings in all of d.values(); use name |
| for logging. Exclude functions and classes not defined in module |
| if specified. Return (#failures, #tries). |
| |
| run__test__(d, name) |
| Treat dict d like module.__test__. Return (#failures, #tries). |
| |
| summarize(verbose=None) |
| Display summary of testing results, to stdout. Return |
| (#failures, #tries). |
| |
| merge(other) |
| Merge in the test results from Tester instance "other". |
| |
| >>> from doctest import Tester |
| >>> t = Tester(globs={'x': 42}, verbose=0) |
| >>> t.runstring(r''' |
| ... >>> x = x * 2 |
| ... >>> print x |
| ... 42 |
| ... ''', 'XYZ') |
| ***************************************************************** |
| Failure in example: print x |
| from line #2 of XYZ |
| Expected: 42 |
| Got: 84 |
| (1, 2) |
| >>> t.runstring(">>> x = x * 2\\n>>> print x\\n84\\n", 'example2') |
| (0, 2) |
| >>> t.summarize() |
| ***************************************************************** |
| 1 items had failures: |
| 1 of 2 in XYZ |
| ***Test Failed*** 1 failures. |
| (1, 4) |
| >>> t.summarize(verbose=1) |
| 1 items passed all tests: |
| 2 tests in example2 |
| ***************************************************************** |
| 1 items had failures: |
| 1 of 2 in XYZ |
| 4 tests in 2 items. |
| 3 passed and 1 failed. |
| ***Test Failed*** 1 failures. |
| (1, 4) |
| >>> |
| """ |
| |
| def __init__(self, mod=None, globs=None, verbose=None, |
| isprivate=None): |
| """mod=None, globs=None, verbose=None, isprivate=None |
| |
| See doctest.__doc__ for an overview. |
| |
| Optional keyword arg "mod" is a module, whose globals are used for |
| executing examples. If not specified, globs must be specified. |
| |
| Optional keyword arg "globs" gives a dict to be used as the globals |
| when executing examples; if not specified, use the globals from |
| module mod. |
| |
| In either case, a copy of the dict is used for each docstring |
| examined. |
| |
| Optional keyword arg "verbose" prints lots of stuff if true, only |
| failures if false; by default, it's true iff "-v" is in sys.argv. |
| |
| Optional keyword arg "isprivate" specifies a function used to determine |
| whether a name is private. The default function is doctest.is_private; |
| see its docs for details. |
| """ |
| |
| if mod is None and globs is None: |
| raise TypeError("Tester.__init__: must specify mod or globs") |
| if mod is not None and not _ismodule(mod): |
| raise TypeError("Tester.__init__: mod must be a module; " + |
| `mod`) |
| if globs is None: |
| globs = mod.__dict__ |
| self.globs = globs |
| |
| if verbose is None: |
| import sys |
| verbose = "-v" in sys.argv |
| self.verbose = verbose |
| |
| if isprivate is None: |
| isprivate = is_private |
| self.isprivate = isprivate |
| |
| self.name2ft = {} # map name to (#failures, #trials) pair |
| |
| self.compileflags = _extract_future_flags(globs) |
| |
| def runstring(self, s, name): |
| """ |
| s, name -> search string s for examples to run, logging as name. |
| |
| Use string name as the key for logging the outcome. |
| Return (#failures, #examples). |
| |
| >>> t = Tester(globs={}, verbose=1) |
| >>> test = r''' |
| ... # just an example |
| ... >>> x = 1 + 2 |
| ... >>> x |
| ... 3 |
| ... ''' |
| >>> t.runstring(test, "Example") |
| Running string Example |
| Trying: x = 1 + 2 |
| Expecting: nothing |
| ok |
| Trying: x |
| Expecting: 3 |
| ok |
| 0 of 2 examples failed in string Example |
| (0, 2) |
| """ |
| |
| if self.verbose: |
| print "Running string", name |
| f = t = 0 |
| e = _extract_examples(s) |
| if e: |
| f, t = _run_examples(e, self.globs, self.verbose, name, |
| self.compileflags) |
| if self.verbose: |
| print f, "of", t, "examples failed in string", name |
| self.__record_outcome(name, f, t) |
| return f, t |
| |
| def rundoc(self, object, name=None): |
| """ |
| object, name=None -> search object.__doc__ for examples to run. |
| |
| Use optional string name as the key for logging the outcome; |
| by default use object.__name__. |
| Return (#failures, #examples). |
| If object is a class object, search recursively for method |
| docstrings too. |
| object.__doc__ is examined regardless of name, but if object is |
| a class, whether private names reached from object are searched |
| depends on the constructor's "isprivate" argument. |
| |
| >>> t = Tester(globs={}, verbose=0) |
| >>> def _f(): |
| ... '''Trivial docstring example. |
| ... >>> assert 2 == 2 |
| ... ''' |
| ... return 32 |
| ... |
| >>> t.rundoc(_f) # expect 0 failures in 1 example |
| (0, 1) |
| """ |
| |
| if name is None: |
| try: |
| name = object.__name__ |
| except AttributeError: |
| raise ValueError("Tester.rundoc: name must be given " |
| "when object.__name__ doesn't exist; " + `object`) |
| if self.verbose: |
| print "Running", name + ".__doc__" |
| f, t = run_docstring_examples(object, self.globs, self.verbose, name, |
| self.compileflags) |
| if self.verbose: |
| print f, "of", t, "examples failed in", name + ".__doc__" |
| self.__record_outcome(name, f, t) |
| if _isclass(object): |
| # In 2.2, class and static methods complicate life. Build |
| # a dict "that works", by hook or by crook. |
| d = {} |
| for tag, kind, homecls, value in _classify_class_attrs(object): |
| |
| if homecls is not object: |
| # Only look at names defined immediately by the class. |
| continue |
| |
| elif self.isprivate(name, tag): |
| continue |
| |
| elif kind == "method": |
| # value is already a function |
| d[tag] = value |
| |
| elif kind == "static method": |
| # value isn't a function, but getattr reveals one |
| d[tag] = getattr(object, tag) |
| |
| elif kind == "class method": |
| # Hmm. A classmethod object doesn't seem to reveal |
| # enough. But getattr turns it into a bound method, |
| # and from there .im_func retrieves the underlying |
| # function. |
| d[tag] = getattr(object, tag).im_func |
| |
| elif kind == "property": |
| # The methods implementing the property have their |
| # own docstrings -- but the property may have one too. |
| if value.__doc__ is not None: |
| d[tag] = str(value.__doc__) |
| |
| elif kind == "data": |
| # Grab nested classes. |
| if _isclass(value): |
| d[tag] = value |
| |
| else: |
| raise ValueError("teach doctest about %r" % kind) |
| |
| f2, t2 = self.run__test__(d, name) |
| f += f2 |
| t += t2 |
| |
| return f, t |
| |
| def rundict(self, d, name, module=None): |
| """ |
| d, name, module=None -> search for docstring examples in d.values(). |
| |
| For k, v in d.items() such that v is a function or class, |
| do self.rundoc(v, name + "." + k). Whether this includes |
| objects with private names depends on the constructor's |
| "isprivate" argument. If module is specified, functions and |
| classes that are not defined in module are excluded. |
| Return aggregate (#failures, #examples). |
| |
| Build and populate two modules with sample functions to test that |
| exclusion of external functions and classes works. |
| |
| >>> import new |
| >>> m1 = new.module('_m1') |
| >>> m2 = new.module('_m2') |
| >>> test_data = \""" |
| ... def _f(): |
| ... '''>>> assert 1 == 1 |
| ... ''' |
| ... def g(): |
| ... '''>>> assert 2 != 1 |
| ... ''' |
| ... class H: |
| ... '''>>> assert 2 > 1 |
| ... ''' |
| ... def bar(self): |
| ... '''>>> assert 1 < 2 |
| ... ''' |
| ... \""" |
| >>> exec test_data in m1.__dict__ |
| >>> exec test_data in m2.__dict__ |
| >>> m1.__dict__.update({"f2": m2._f, "g2": m2.g, "h2": m2.H}) |
| |
| Tests that objects outside m1 are excluded: |
| |
| >>> t = Tester(globs={}, verbose=0) |
| >>> t.rundict(m1.__dict__, "rundict_test", m1) # _f, f2 and g2 and h2 skipped |
| (0, 3) |
| |
| Again, but with a custom isprivate function allowing _f: |
| |
| >>> t = Tester(globs={}, verbose=0, isprivate=lambda x,y: 0) |
| >>> t.rundict(m1.__dict__, "rundict_test_pvt", m1) # Only f2, g2 and h2 skipped |
| (0, 4) |
| |
| And once more, not excluding stuff outside m1: |
| |
| >>> t = Tester(globs={}, verbose=0, isprivate=lambda x,y: 0) |
| >>> t.rundict(m1.__dict__, "rundict_test_pvt") # None are skipped. |
| (0, 8) |
| |
| The exclusion of objects from outside the designated module is |
| meant to be invoked automagically by testmod. |
| |
| >>> testmod(m1) |
| (0, 3) |
| |
| """ |
| |
| if not hasattr(d, "items"): |
| raise TypeError("Tester.rundict: d must support .items(); " + |
| `d`) |
| f = t = 0 |
| # Run the tests by alpha order of names, for consistency in |
| # verbose-mode output. |
| names = d.keys() |
| names.sort() |
| for thisname in names: |
| value = d[thisname] |
| if _isfunction(value) or _isclass(value): |
| if module and not _from_module(module, value): |
| continue |
| f2, t2 = self.__runone(value, name + "." + thisname) |
| f = f + f2 |
| t = t + t2 |
| return f, t |
| |
| def run__test__(self, d, name): |
| """d, name -> Treat dict d like module.__test__. |
| |
| Return (#failures, #tries). |
| See testmod.__doc__ for details. |
| """ |
| |
| failures = tries = 0 |
| prefix = name + "." |
| savepvt = self.isprivate |
| try: |
| self.isprivate = lambda *args: 0 |
| # Run the tests by alpha order of names, for consistency in |
| # verbose-mode output. |
| keys = d.keys() |
| keys.sort() |
| for k in keys: |
| v = d[k] |
| thisname = prefix + k |
| if type(v) in _StringTypes: |
| f, t = self.runstring(v, thisname) |
| elif _isfunction(v) or _isclass(v): |
| f, t = self.rundoc(v, thisname) |
| else: |
| raise TypeError("Tester.run__test__: values in " |
| "dict must be strings, functions " |
| "or classes; " + `v`) |
| failures = failures + f |
| tries = tries + t |
| finally: |
| self.isprivate = savepvt |
| return failures, tries |
| |
| def summarize(self, verbose=None): |
| """ |
| verbose=None -> summarize results, return (#failures, #tests). |
| |
| Print summary of test results to stdout. |
| Optional arg 'verbose' controls how wordy this is. By |
| default, use the verbose setting established by the |
| constructor. |
| """ |
| |
| if verbose is None: |
| verbose = self.verbose |
| notests = [] |
| passed = [] |
| failed = [] |
| totalt = totalf = 0 |
| for x in self.name2ft.items(): |
| name, (f, t) = x |
| assert f <= t |
| totalt = totalt + t |
| totalf = totalf + f |
| if t == 0: |
| notests.append(name) |
| elif f == 0: |
| passed.append( (name, t) ) |
| else: |
| failed.append(x) |
| if verbose: |
| if notests: |
| print len(notests), "items had no tests:" |
| notests.sort() |
| for thing in notests: |
| print " ", thing |
| if passed: |
| print len(passed), "items passed all tests:" |
| passed.sort() |
| for thing, count in passed: |
| print " %3d tests in %s" % (count, thing) |
| if failed: |
| print "*" * 65 |
| print len(failed), "items had failures:" |
| failed.sort() |
| for thing, (f, t) in failed: |
| print " %3d of %3d in %s" % (f, t, thing) |
| if verbose: |
| print totalt, "tests in", len(self.name2ft), "items." |
| print totalt - totalf, "passed and", totalf, "failed." |
| if totalf: |
| print "***Test Failed***", totalf, "failures." |
| elif verbose: |
| print "Test passed." |
| return totalf, totalt |
| |
| def merge(self, other): |
| """ |
| other -> merge in test results from the other Tester instance. |
| |
| If self and other both have a test result for something |
| with the same name, the (#failures, #tests) results are |
| summed, and a warning is printed to stdout. |
| |
| >>> from doctest import Tester |
| >>> t1 = Tester(globs={}, verbose=0) |
| >>> t1.runstring(''' |
| ... >>> x = 12 |
| ... >>> print x |
| ... 12 |
| ... ''', "t1example") |
| (0, 2) |
| >>> |
| >>> t2 = Tester(globs={}, verbose=0) |
| >>> t2.runstring(''' |
| ... >>> x = 13 |
| ... >>> print x |
| ... 13 |
| ... ''', "t2example") |
| (0, 2) |
| >>> common = ">>> assert 1 + 2 == 3\\n" |
| >>> t1.runstring(common, "common") |
| (0, 1) |
| >>> t2.runstring(common, "common") |
| (0, 1) |
| >>> t1.merge(t2) |
| *** Tester.merge: 'common' in both testers; summing outcomes. |
| >>> t1.summarize(1) |
| 3 items passed all tests: |
| 2 tests in common |
| 2 tests in t1example |
| 2 tests in t2example |
| 6 tests in 3 items. |
| 6 passed and 0 failed. |
| Test passed. |
| (0, 6) |
| >>> |
| """ |
| |
| d = self.name2ft |
| for name, (f, t) in other.name2ft.items(): |
| if name in d: |
| print "*** Tester.merge: '" + name + "' in both" \ |
| " testers; summing outcomes." |
| f2, t2 = d[name] |
| f = f + f2 |
| t = t + t2 |
| d[name] = f, t |
| |
| def __record_outcome(self, name, f, t): |
| if name in self.name2ft: |
| print "*** Warning: '" + name + "' was tested before;", \ |
| "summing outcomes." |
| f2, t2 = self.name2ft[name] |
| f = f + f2 |
| t = t + t2 |
| self.name2ft[name] = f, t |
| |
| def __runone(self, target, name): |
| if "." in name: |
| i = name.rindex(".") |
| prefix, base = name[:i], name[i+1:] |
| else: |
| prefix, base = "", base |
| if self.isprivate(prefix, base): |
| return 0, 0 |
| return self.rundoc(target, name) |
| |
| master = None |
| |
| def testmod(m=None, name=None, globs=None, verbose=None, isprivate=None, |
| report=1): |
| """m=None, name=None, globs=None, verbose=None, isprivate=None, report=1 |
| |
| Test examples in docstrings in functions and classes reachable |
| from module m (or the current module if m is not supplied), starting |
| with m.__doc__. Private names are skipped. |
| |
| Also test examples reachable from dict m.__test__ if it exists and is |
| not None. m.__dict__ maps names to functions, classes and strings; |
| function and class docstrings are tested even if the name is private; |
| strings are tested directly, as if they were docstrings. |
| |
| Return (#failures, #tests). |
| |
| See doctest.__doc__ for an overview. |
| |
| Optional keyword arg "name" gives the name of the module; by default |
| use m.__name__. |
| |
| Optional keyword arg "globs" gives a dict to be used as the globals |
| when executing examples; by default, use m.__dict__. A copy of this |
| dict is actually used for each docstring, so that each docstring's |
| examples start with a clean slate. |
| |
| Optional keyword arg "verbose" prints lots of stuff if true, prints |
| only failures if false; by default, it's true iff "-v" is in sys.argv. |
| |
| Optional keyword arg "isprivate" specifies a function used to |
| determine whether a name is private. The default function is |
| doctest.is_private; see its docs for details. |
| |
| Optional keyword arg "report" prints a summary at the end when true, |
| else prints nothing at the end. In verbose mode, the summary is |
| detailed, else very brief (in fact, empty if all tests passed). |
| |
| Advanced tomfoolery: testmod runs methods of a local instance of |
| class doctest.Tester, then merges the results into (or creates) |
| global Tester instance doctest.master. Methods of doctest.master |
| can be called directly too, if you want to do something unusual. |
| Passing report=0 to testmod is especially useful then, to delay |
| displaying a summary. Invoke doctest.master.summarize(verbose) |
| when you're done fiddling. |
| """ |
| |
| global master |
| |
| if m is None: |
| import sys |
| # DWA - m will still be None if this wasn't invoked from the command |
| # line, in which case the following TypeError is about as good an error |
| # as we should expect |
| m = sys.modules.get('__main__') |
| |
| if not _ismodule(m): |
| raise TypeError("testmod: module required; " + `m`) |
| if name is None: |
| name = m.__name__ |
| tester = Tester(m, globs=globs, verbose=verbose, isprivate=isprivate) |
| failures, tries = tester.rundoc(m, name) |
| f, t = tester.rundict(m.__dict__, name, m) |
| failures = failures + f |
| tries = tries + t |
| if hasattr(m, "__test__"): |
| testdict = m.__test__ |
| if testdict: |
| if not hasattr(testdict, "items"): |
| raise TypeError("testmod: module.__test__ must support " |
| ".items(); " + `testdict`) |
| f, t = tester.run__test__(testdict, name + ".__test__") |
| failures = failures + f |
| tries = tries + t |
| if report: |
| tester.summarize() |
| if master is None: |
| master = tester |
| else: |
| master.merge(tester) |
| return failures, tries |
| |
| class _TestClass: |
| """ |
| A pointless class, for sanity-checking of docstring testing. |
| |
| Methods: |
| square() |
| get() |
| |
| >>> _TestClass(13).get() + _TestClass(-12).get() |
| 1 |
| >>> hex(_TestClass(13).square().get()) |
| '0xa9' |
| """ |
| |
| def __init__(self, val): |
| """val -> _TestClass object with associated value val. |
| |
| >>> t = _TestClass(123) |
| >>> print t.get() |
| 123 |
| """ |
| |
| self.val = val |
| |
| def square(self): |
| """square() -> square TestClass's associated value |
| |
| >>> _TestClass(13).square().get() |
| 169 |
| """ |
| |
| self.val = self.val ** 2 |
| return self |
| |
| def get(self): |
| """get() -> return TestClass's associated value. |
| |
| >>> x = _TestClass(-42) |
| >>> print x.get() |
| -42 |
| """ |
| |
| return self.val |
| |
| __test__ = {"_TestClass": _TestClass, |
| "string": r""" |
| Example of a string object, searched as-is. |
| >>> x = 1; y = 2 |
| >>> x + y, x * y |
| (3, 2) |
| """ |
| } |
| |
| def _test(): |
| import doctest |
| return doctest.testmod(doctest) |
| |
| if __name__ == "__main__": |
| _test() |