Brett Cannon | f1cfb62 | 2003-05-04 21:15:27 +0000 | [diff] [blame] | 1 | """Supporting definitions for the Python regression tests.""" |
Guido van Rossum | 3bead09 | 1992-01-27 17:00:37 +0000 | [diff] [blame] | 2 | |
Benjamin Peterson | ee8712c | 2008-05-20 21:35:26 +0000 | [diff] [blame] | 3 | if __name__ != 'test.support': |
| 4 | raise ImportError('support must be imported from the test package') |
Barry Warsaw | 408b6d3 | 2002-07-30 23:27:12 +0000 | [diff] [blame] | 5 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 6 | import contextlib |
| 7 | import errno |
Benjamin Peterson | fa0d703 | 2009-06-01 22:42:33 +0000 | [diff] [blame] | 8 | import functools |
Benjamin Peterson | 8cc7d88 | 2009-06-01 23:14:51 +0000 | [diff] [blame] | 9 | import gc |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 10 | import socket |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 11 | import sys |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 12 | import os |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 13 | import platform |
Christian Heimes | 23daade0 | 2008-02-25 12:39:23 +0000 | [diff] [blame] | 14 | import shutil |
Thomas Wouters | 902d6eb | 2007-01-09 23:18:33 +0000 | [diff] [blame] | 15 | import warnings |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 16 | import unittest |
R. David Murray | a21e4ca | 2009-03-31 23:16:50 +0000 | [diff] [blame] | 17 | import importlib |
Walter Dörwald | 155374d | 2009-05-01 19:58:58 +0000 | [diff] [blame] | 18 | import collections |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 19 | import re |
Brian Curtin | d40e6f7 | 2010-07-08 21:39:08 +0000 | [diff] [blame] | 20 | import subprocess |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 21 | import imp |
Benjamin Peterson | a6590e8 | 2010-04-11 21:22:10 +0000 | [diff] [blame] | 22 | import time |
Benjamin Peterson | 65c66ab | 2010-10-29 21:31:35 +0000 | [diff] [blame] | 23 | import sysconfig |
| 24 | |
| 25 | |
Victor Stinner | 45df820 | 2010-04-28 22:31:17 +0000 | [diff] [blame] | 26 | try: |
| 27 | import _thread |
| 28 | except ImportError: |
| 29 | _thread = None |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 30 | |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 31 | __all__ = [ |
| 32 | "Error", "TestFailed", "ResourceDenied", "import_module", |
| 33 | "verbose", "use_resources", "max_memuse", "record_original_stdout", |
| 34 | "get_original_stdout", "unload", "unlink", "rmtree", "forget", |
| 35 | "is_resource_enabled", "requires", "find_unused_port", "bind_port", |
| 36 | "fcmp", "is_jython", "TESTFN", "HOST", "FUZZ", "SAVEDCWD", "temp_cwd", |
| 37 | "findfile", "sortdict", "check_syntax_error", "open_urlresource", |
| 38 | "check_warnings", "CleanImport", "EnvironmentVarGuard", |
| 39 | "TransientResource", "captured_output", "captured_stdout", |
| 40 | "time_out", "socket_peer_reset", "ioerror_peer_reset", |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 41 | "run_with_locale", 'temp_umask', "transient_internet", |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 42 | "set_memlimit", "bigmemtest", "bigaddrspacetest", "BasicTestRunner", |
| 43 | "run_unittest", "run_doctest", "threading_setup", "threading_cleanup", |
| 44 | "reap_children", "cpython_only", "check_impl_detail", "get_attribute", |
Brian Curtin | d40e6f7 | 2010-07-08 21:39:08 +0000 | [diff] [blame] | 45 | "swap_item", "swap_attr", "can_symlink", "skip_unless_symlink"] |
Benjamin Peterson | 744c2cd | 2008-05-26 16:26:37 +0000 | [diff] [blame] | 46 | |
Florent Xicluna | f089fd6 | 2010-03-19 14:25:03 +0000 | [diff] [blame] | 47 | |
Fred Drake | 1790dd4 | 2000-07-24 06:55:00 +0000 | [diff] [blame] | 48 | class Error(Exception): |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 49 | """Base class for regression test exceptions.""" |
Fred Drake | 1790dd4 | 2000-07-24 06:55:00 +0000 | [diff] [blame] | 50 | |
| 51 | class TestFailed(Error): |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 52 | """Test failed.""" |
Fred Drake | 1790dd4 | 2000-07-24 06:55:00 +0000 | [diff] [blame] | 53 | |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 54 | class ResourceDenied(unittest.SkipTest): |
Fred Drake | 9a0db07 | 2003-02-03 15:19:30 +0000 | [diff] [blame] | 55 | """Test skipped because it requested a disallowed resource. |
| 56 | |
| 57 | This is raised when a test calls requires() for a resource that |
| 58 | has not be enabled. It is used to distinguish between expected |
| 59 | and unexpected skips. |
| 60 | """ |
| 61 | |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 62 | @contextlib.contextmanager |
| 63 | def _ignore_deprecated_imports(ignore=True): |
| 64 | """Context manager to suppress package and module deprecation |
| 65 | warnings when importing them. |
| 66 | |
| 67 | If ignore is False, this context manager has no effect.""" |
| 68 | if ignore: |
| 69 | with warnings.catch_warnings(): |
| 70 | warnings.filterwarnings("ignore", ".+ (module|package)", |
| 71 | DeprecationWarning) |
| 72 | yield |
| 73 | else: |
| 74 | yield |
| 75 | |
| 76 | |
Benjamin Peterson | 699adb9 | 2008-05-08 22:27:58 +0000 | [diff] [blame] | 77 | def import_module(name, deprecated=False): |
R. David Murray | a21e4ca | 2009-03-31 23:16:50 +0000 | [diff] [blame] | 78 | """Import and return the module to be tested, raising SkipTest if |
| 79 | it is not available. |
| 80 | |
| 81 | If deprecated is True, any module or package deprecation messages |
| 82 | will be suppressed.""" |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 83 | with _ignore_deprecated_imports(deprecated): |
Benjamin Peterson | 699adb9 | 2008-05-08 22:27:58 +0000 | [diff] [blame] | 84 | try: |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 85 | return importlib.import_module(name) |
R. David Murray | a21e4ca | 2009-03-31 23:16:50 +0000 | [diff] [blame] | 86 | except ImportError as msg: |
| 87 | raise unittest.SkipTest(str(msg)) |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 88 | |
| 89 | |
Nick Coghlan | 4738470 | 2009-04-22 16:13:36 +0000 | [diff] [blame] | 90 | def _save_and_remove_module(name, orig_modules): |
| 91 | """Helper function to save and remove a module from sys.modules |
| 92 | |
| 93 | Return value is True if the module was in sys.modules and |
| 94 | False otherwise.""" |
| 95 | saved = True |
| 96 | try: |
| 97 | orig_modules[name] = sys.modules[name] |
| 98 | except KeyError: |
| 99 | saved = False |
| 100 | else: |
| 101 | del sys.modules[name] |
| 102 | return saved |
| 103 | |
| 104 | |
| 105 | def _save_and_block_module(name, orig_modules): |
| 106 | """Helper function to save and block a module in sys.modules |
| 107 | |
| 108 | Return value is True if the module was in sys.modules and |
| 109 | False otherwise.""" |
| 110 | saved = True |
| 111 | try: |
| 112 | orig_modules[name] = sys.modules[name] |
| 113 | except KeyError: |
| 114 | saved = False |
Alexander Belopolsky | 903396e | 2010-07-13 14:50:16 +0000 | [diff] [blame] | 115 | sys.modules[name] = None |
Nick Coghlan | 4738470 | 2009-04-22 16:13:36 +0000 | [diff] [blame] | 116 | return saved |
| 117 | |
| 118 | |
| 119 | def import_fresh_module(name, fresh=(), blocked=(), deprecated=False): |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 120 | """Imports and returns a module, deliberately bypassing the sys.modules cache |
| 121 | and importing a fresh copy of the module. Once the import is complete, |
| 122 | the sys.modules cache is restored to its original state. |
| 123 | |
Nick Coghlan | 4738470 | 2009-04-22 16:13:36 +0000 | [diff] [blame] | 124 | Modules named in fresh are also imported anew if needed by the import. |
| 125 | |
| 126 | Importing of modules named in blocked is prevented while the fresh import |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 127 | takes place. |
| 128 | |
| 129 | If deprecated is True, any module or package deprecation messages |
| 130 | will be suppressed.""" |
| 131 | # NOTE: test_heapq and test_warnings include extra sanity checks to make |
| 132 | # sure that this utility function is working as expected |
| 133 | with _ignore_deprecated_imports(deprecated): |
Nick Coghlan | 4738470 | 2009-04-22 16:13:36 +0000 | [diff] [blame] | 134 | # Keep track of modules saved for later restoration as well |
| 135 | # as those which just need a blocking entry removed |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 136 | orig_modules = {} |
Nick Coghlan | 4738470 | 2009-04-22 16:13:36 +0000 | [diff] [blame] | 137 | names_to_remove = [] |
| 138 | _save_and_remove_module(name, orig_modules) |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 139 | try: |
Nick Coghlan | 4738470 | 2009-04-22 16:13:36 +0000 | [diff] [blame] | 140 | for fresh_name in fresh: |
| 141 | _save_and_remove_module(fresh_name, orig_modules) |
| 142 | for blocked_name in blocked: |
| 143 | if not _save_and_block_module(blocked_name, orig_modules): |
| 144 | names_to_remove.append(blocked_name) |
| 145 | fresh_module = importlib.import_module(name) |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 146 | finally: |
Nick Coghlan | 4738470 | 2009-04-22 16:13:36 +0000 | [diff] [blame] | 147 | for orig_name, module in orig_modules.items(): |
| 148 | sys.modules[orig_name] = module |
| 149 | for name_to_remove in names_to_remove: |
| 150 | del sys.modules[name_to_remove] |
| 151 | return fresh_module |
Nick Coghlan | fce769e | 2009-04-11 14:30:59 +0000 | [diff] [blame] | 152 | |
Benjamin Peterson | 699adb9 | 2008-05-08 22:27:58 +0000 | [diff] [blame] | 153 | |
R. David Murray | a21e4ca | 2009-03-31 23:16:50 +0000 | [diff] [blame] | 154 | def get_attribute(obj, name): |
| 155 | """Get an attribute, raising SkipTest if AttributeError is raised.""" |
| 156 | try: |
| 157 | attribute = getattr(obj, name) |
| 158 | except AttributeError: |
| 159 | raise unittest.SkipTest("module %s has no attribute %s" % ( |
| 160 | obj.__name__, name)) |
| 161 | else: |
| 162 | return attribute |
| 163 | |
Barry Warsaw | c0fb605 | 2001-08-20 22:29:23 +0000 | [diff] [blame] | 164 | verbose = 1 # Flag set to 0 by regrtest.py |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 165 | use_resources = None # Flag set to [] by regrtest.py |
| 166 | max_memuse = 0 # Disable bigmem tests (they will still be run with |
| 167 | # small sizes, to make sure they work.) |
Neal Norwitz | 3ce5d92 | 2008-08-24 07:08:55 +0000 | [diff] [blame] | 168 | real_max_memuse = 0 |
Guido van Rossum | 531661c | 1996-12-20 02:58:22 +0000 | [diff] [blame] | 169 | |
Tim Peters | 8dee809 | 2001-09-25 20:05:11 +0000 | [diff] [blame] | 170 | # _original_stdout is meant to hold stdout at the time regrtest began. |
| 171 | # This may be "the real" stdout, or IDLE's emulation of stdout, or whatever. |
| 172 | # The point is to have some flavor of stdout the user can actually see. |
| 173 | _original_stdout = None |
| 174 | def record_original_stdout(stdout): |
| 175 | global _original_stdout |
| 176 | _original_stdout = stdout |
| 177 | |
| 178 | def get_original_stdout(): |
| 179 | return _original_stdout or sys.stdout |
| 180 | |
Guido van Rossum | 3bead09 | 1992-01-27 17:00:37 +0000 | [diff] [blame] | 181 | def unload(name): |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 182 | try: |
| 183 | del sys.modules[name] |
| 184 | except KeyError: |
| 185 | pass |
Guido van Rossum | 3bead09 | 1992-01-27 17:00:37 +0000 | [diff] [blame] | 186 | |
Neal Norwitz | 0e17f8c | 2006-01-23 07:51:27 +0000 | [diff] [blame] | 187 | def unlink(filename): |
Neal Norwitz | 0e17f8c | 2006-01-23 07:51:27 +0000 | [diff] [blame] | 188 | try: |
| 189 | os.unlink(filename) |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 190 | except OSError as error: |
| 191 | # The filename need not exist. |
Michael Foord | 2d9c2d5 | 2010-05-04 22:29:10 +0000 | [diff] [blame] | 192 | if error.errno not in (errno.ENOENT, errno.ENOTDIR): |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 193 | raise |
Neal Norwitz | 0e17f8c | 2006-01-23 07:51:27 +0000 | [diff] [blame] | 194 | |
Christian Heimes | 23daade0 | 2008-02-25 12:39:23 +0000 | [diff] [blame] | 195 | def rmtree(path): |
| 196 | try: |
| 197 | shutil.rmtree(path) |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 198 | except OSError as error: |
Christian Heimes | 23daade0 | 2008-02-25 12:39:23 +0000 | [diff] [blame] | 199 | # Unix returns ENOENT, Windows returns ESRCH. |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 200 | if error.errno not in (errno.ENOENT, errno.ESRCH): |
Christian Heimes | 23daade0 | 2008-02-25 12:39:23 +0000 | [diff] [blame] | 201 | raise |
| 202 | |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 203 | def make_legacy_pyc(source): |
| 204 | """Move a PEP 3147 pyc/pyo file to its legacy pyc/pyo location. |
| 205 | |
| 206 | The choice of .pyc or .pyo extension is done based on the __debug__ flag |
| 207 | value. |
| 208 | |
| 209 | :param source: The file system path to the source file. The source file |
| 210 | does not need to exist, however the PEP 3147 pyc file must exist. |
| 211 | :return: The file system path to the legacy pyc file. |
| 212 | """ |
| 213 | pyc_file = imp.cache_from_source(source) |
| 214 | up_one = os.path.dirname(os.path.abspath(source)) |
| 215 | legacy_pyc = os.path.join(up_one, source + ('c' if __debug__ else 'o')) |
| 216 | os.rename(pyc_file, legacy_pyc) |
| 217 | return legacy_pyc |
| 218 | |
Guido van Rossum | 3bead09 | 1992-01-27 17:00:37 +0000 | [diff] [blame] | 219 | def forget(modname): |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 220 | """'Forget' a module was ever imported. |
| 221 | |
| 222 | This removes the module from sys.modules and deletes any PEP 3147 or |
| 223 | legacy .pyc and .pyo files. |
| 224 | """ |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 225 | unload(modname) |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 226 | for dirname in sys.path: |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 227 | source = os.path.join(dirname, modname + '.py') |
| 228 | # It doesn't matter if they exist or not, unlink all possible |
| 229 | # combinations of PEP 3147 and legacy pyc and pyo files. |
| 230 | unlink(source + 'c') |
| 231 | unlink(source + 'o') |
| 232 | unlink(imp.cache_from_source(source, debug_override=True)) |
| 233 | unlink(imp.cache_from_source(source, debug_override=False)) |
Guido van Rossum | 3bead09 | 1992-01-27 17:00:37 +0000 | [diff] [blame] | 234 | |
Tim Peters | b4ee4eb | 2002-12-04 03:26:57 +0000 | [diff] [blame] | 235 | def is_resource_enabled(resource): |
Brett Cannon | f1cfb62 | 2003-05-04 21:15:27 +0000 | [diff] [blame] | 236 | """Test whether a resource is enabled. Known resources are set by |
| 237 | regrtest.py.""" |
Tim Peters | b4ee4eb | 2002-12-04 03:26:57 +0000 | [diff] [blame] | 238 | return use_resources is not None and resource in use_resources |
| 239 | |
Barry Warsaw | c0fb605 | 2001-08-20 22:29:23 +0000 | [diff] [blame] | 240 | def requires(resource, msg=None): |
Brett Cannon | f1cfb62 | 2003-05-04 21:15:27 +0000 | [diff] [blame] | 241 | """Raise ResourceDenied if the specified resource is not available. |
| 242 | |
| 243 | If the caller's module is __main__ then automatically return True. The |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 244 | possibility of False being returned occurs when regrtest.py is |
| 245 | executing. |
| 246 | """ |
Skip Montanaro | d839ecd | 2003-04-24 19:06:57 +0000 | [diff] [blame] | 247 | # see if the caller's module is __main__ - if so, treat as if |
| 248 | # the resource was set |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 249 | if sys._getframe(1).f_globals.get("__name__") == "__main__": |
Skip Montanaro | d839ecd | 2003-04-24 19:06:57 +0000 | [diff] [blame] | 250 | return |
Tim Peters | b4ee4eb | 2002-12-04 03:26:57 +0000 | [diff] [blame] | 251 | if not is_resource_enabled(resource): |
Barry Warsaw | c0fb605 | 2001-08-20 22:29:23 +0000 | [diff] [blame] | 252 | if msg is None: |
| 253 | msg = "Use of the `%s' resource not enabled" % resource |
Fred Drake | 9a0db07 | 2003-02-03 15:19:30 +0000 | [diff] [blame] | 254 | raise ResourceDenied(msg) |
Barry Warsaw | c0fb605 | 2001-08-20 22:29:23 +0000 | [diff] [blame] | 255 | |
Christian Heimes | 5e69685 | 2008-04-09 08:37:03 +0000 | [diff] [blame] | 256 | HOST = 'localhost' |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 257 | |
Christian Heimes | 5e69685 | 2008-04-09 08:37:03 +0000 | [diff] [blame] | 258 | def find_unused_port(family=socket.AF_INET, socktype=socket.SOCK_STREAM): |
| 259 | """Returns an unused port that should be suitable for binding. This is |
| 260 | achieved by creating a temporary socket with the same family and type as |
| 261 | the 'sock' parameter (default is AF_INET, SOCK_STREAM), and binding it to |
| 262 | the specified host address (defaults to 0.0.0.0) with the port set to 0, |
| 263 | eliciting an unused ephemeral port from the OS. The temporary socket is |
| 264 | then closed and deleted, and the ephemeral port is returned. |
| 265 | |
| 266 | Either this method or bind_port() should be used for any tests where a |
| 267 | server socket needs to be bound to a particular port for the duration of |
| 268 | the test. Which one to use depends on whether the calling code is creating |
| 269 | a python socket, or if an unused port needs to be provided in a constructor |
| 270 | or passed to an external program (i.e. the -accept argument to openssl's |
| 271 | s_server mode). Always prefer bind_port() over find_unused_port() where |
| 272 | possible. Hard coded ports should *NEVER* be used. As soon as a server |
| 273 | socket is bound to a hard coded port, the ability to run multiple instances |
| 274 | of the test simultaneously on the same host is compromised, which makes the |
| 275 | test a ticking time bomb in a buildbot environment. On Unix buildbots, this |
| 276 | may simply manifest as a failed test, which can be recovered from without |
| 277 | intervention in most cases, but on Windows, the entire python process can |
| 278 | completely and utterly wedge, requiring someone to log in to the buildbot |
| 279 | and manually kill the affected process. |
| 280 | |
| 281 | (This is easy to reproduce on Windows, unfortunately, and can be traced to |
| 282 | the SO_REUSEADDR socket option having different semantics on Windows versus |
| 283 | Unix/Linux. On Unix, you can't have two AF_INET SOCK_STREAM sockets bind, |
| 284 | listen and then accept connections on identical host/ports. An EADDRINUSE |
| 285 | socket.error will be raised at some point (depending on the platform and |
| 286 | the order bind and listen were called on each socket). |
| 287 | |
| 288 | However, on Windows, if SO_REUSEADDR is set on the sockets, no EADDRINUSE |
| 289 | will ever be raised when attempting to bind two identical host/ports. When |
| 290 | accept() is called on each socket, the second caller's process will steal |
| 291 | the port from the first caller, leaving them both in an awkwardly wedged |
| 292 | state where they'll no longer respond to any signals or graceful kills, and |
| 293 | must be forcibly killed via OpenProcess()/TerminateProcess(). |
| 294 | |
| 295 | The solution on Windows is to use the SO_EXCLUSIVEADDRUSE socket option |
| 296 | instead of SO_REUSEADDR, which effectively affords the same semantics as |
| 297 | SO_REUSEADDR on Unix. Given the propensity of Unix developers in the Open |
| 298 | Source world compared to Windows ones, this is a common mistake. A quick |
| 299 | look over OpenSSL's 0.9.8g source shows that they use SO_REUSEADDR when |
| 300 | openssl.exe is called with the 's_server' option, for example. See |
| 301 | http://bugs.python.org/issue2550 for more info. The following site also |
| 302 | has a very thorough description about the implications of both REUSEADDR |
| 303 | and EXCLUSIVEADDRUSE on Windows: |
| 304 | http://msdn2.microsoft.com/en-us/library/ms740621(VS.85).aspx) |
| 305 | |
| 306 | XXX: although this approach is a vast improvement on previous attempts to |
| 307 | elicit unused ports, it rests heavily on the assumption that the ephemeral |
| 308 | port returned to us by the OS won't immediately be dished back out to some |
| 309 | other process when we close and delete our temporary socket but before our |
| 310 | calling code has a chance to bind the returned port. We can deal with this |
| 311 | issue if/when we come across it. |
| 312 | """ |
| 313 | |
| 314 | tempsock = socket.socket(family, socktype) |
| 315 | port = bind_port(tempsock) |
| 316 | tempsock.close() |
| 317 | del tempsock |
| 318 | return port |
| 319 | |
| 320 | def bind_port(sock, host=HOST): |
| 321 | """Bind the socket to a free port and return the port number. Relies on |
| 322 | ephemeral ports in order to ensure we are using an unbound port. This is |
| 323 | important as many tests may be running simultaneously, especially in a |
| 324 | buildbot environment. This method raises an exception if the sock.family |
| 325 | is AF_INET and sock.type is SOCK_STREAM, *and* the socket has SO_REUSEADDR |
| 326 | or SO_REUSEPORT set on it. Tests should *never* set these socket options |
| 327 | for TCP/IP sockets. The only case for setting these options is testing |
| 328 | multicasting via multiple UDP sockets. |
| 329 | |
| 330 | Additionally, if the SO_EXCLUSIVEADDRUSE socket option is available (i.e. |
| 331 | on Windows), it will be set on the socket. This will prevent anyone else |
| 332 | from bind()'ing to our host/port for the duration of the test. |
| 333 | """ |
| 334 | |
| 335 | if sock.family == socket.AF_INET and sock.type == socket.SOCK_STREAM: |
| 336 | if hasattr(socket, 'SO_REUSEADDR'): |
| 337 | if sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR) == 1: |
| 338 | raise TestFailed("tests should never set the SO_REUSEADDR " \ |
| 339 | "socket option on TCP/IP sockets!") |
| 340 | if hasattr(socket, 'SO_REUSEPORT'): |
| 341 | if sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT) == 1: |
| 342 | raise TestFailed("tests should never set the SO_REUSEPORT " \ |
| 343 | "socket option on TCP/IP sockets!") |
| 344 | if hasattr(socket, 'SO_EXCLUSIVEADDRUSE'): |
| 345 | sock.setsockopt(socket.SOL_SOCKET, socket.SO_EXCLUSIVEADDRUSE, 1) |
| 346 | |
| 347 | sock.bind((host, 0)) |
| 348 | port = sock.getsockname()[1] |
| 349 | return port |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 350 | |
Guido van Rossum | 35fb82a | 1993-01-26 13:04:43 +0000 | [diff] [blame] | 351 | FUZZ = 1e-6 |
| 352 | |
| 353 | def fcmp(x, y): # fuzzy comparison function |
Neal Norwitz | 7921299 | 2006-08-21 16:27:31 +0000 | [diff] [blame] | 354 | if isinstance(x, float) or isinstance(y, float): |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 355 | try: |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 356 | fuzz = (abs(x) + abs(y)) * FUZZ |
| 357 | if abs(x-y) <= fuzz: |
| 358 | return 0 |
| 359 | except: |
| 360 | pass |
Neal Norwitz | 7921299 | 2006-08-21 16:27:31 +0000 | [diff] [blame] | 361 | elif type(x) == type(y) and isinstance(x, (tuple, list)): |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 362 | for i in range(min(len(x), len(y))): |
| 363 | outcome = fcmp(x[i], y[i]) |
Fred Drake | 132dce2 | 2000-12-12 23:11:42 +0000 | [diff] [blame] | 364 | if outcome != 0: |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 365 | return outcome |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 366 | return (len(x) > len(y)) - (len(x) < len(y)) |
| 367 | return (x > y) - (x < y) |
Guido van Rossum | 35fb82a | 1993-01-26 13:04:43 +0000 | [diff] [blame] | 368 | |
Finn Bock | 57bc5fa | 2002-11-01 18:02:03 +0000 | [diff] [blame] | 369 | is_jython = sys.platform.startswith('java') |
| 370 | |
Barry Warsaw | 559f668 | 2001-03-23 18:04:02 +0000 | [diff] [blame] | 371 | # Filename used for testing |
| 372 | if os.name == 'java': |
| 373 | # Jython disallows @ in module names |
| 374 | TESTFN = '$test' |
Martin v. Löwis | a94568a | 2003-05-10 07:36:56 +0000 | [diff] [blame] | 375 | else: |
Barry Warsaw | 559f668 | 2001-03-23 18:04:02 +0000 | [diff] [blame] | 376 | TESTFN = '@test' |
Walter Dörwald | 9b77553 | 2007-06-08 14:30:53 +0000 | [diff] [blame] | 377 | |
Antoine Pitrou | 8890954 | 2009-06-29 13:54:42 +0000 | [diff] [blame] | 378 | # Disambiguate TESTFN for parallel testing, while letting it remain a valid |
| 379 | # module name. |
Ezio Melotti | 184bdfb | 2010-02-18 09:37:05 +0000 | [diff] [blame] | 380 | TESTFN = "{}_{}_tmp".format(TESTFN, os.getpid()) |
Antoine Pitrou | 8890954 | 2009-06-29 13:54:42 +0000 | [diff] [blame] | 381 | |
Michael Foord | 2d9c2d5 | 2010-05-04 22:29:10 +0000 | [diff] [blame] | 382 | |
Victor Stinner | d91df1a | 2010-08-18 10:56:19 +0000 | [diff] [blame] | 383 | # TESTFN_UNICODE is a non-ascii filename |
| 384 | TESTFN_UNICODE = TESTFN + "-\xe0\xf2\u0258\u0141\u011f" |
Victor Stinner | 74a833f | 2010-08-18 21:06:23 +0000 | [diff] [blame] | 385 | if sys.platform == 'darwin': |
| 386 | # In Mac OS X's VFS API file names are, by definition, canonically |
| 387 | # decomposed Unicode, encoded using UTF-8. See QA1173: |
| 388 | # http://developer.apple.com/mac/library/qa/qa2001/qa1173.html |
| 389 | import unicodedata |
| 390 | TESTFN_UNICODE = unicodedata.normalize('NFD', TESTFN_UNICODE) |
Antoine Pitrou | 8890954 | 2009-06-29 13:54:42 +0000 | [diff] [blame] | 391 | TESTFN_ENCODING = sys.getfilesystemencoding() |
Victor Stinner | 3d85a6f | 2010-08-13 13:02:04 +0000 | [diff] [blame] | 392 | |
Victor Stinner | 09c449c | 2010-08-13 22:23:24 +0000 | [diff] [blame] | 393 | # TESTFN_UNENCODABLE is a filename (str type) that should *not* be able to be |
Victor Stinner | 3d85a6f | 2010-08-13 13:02:04 +0000 | [diff] [blame] | 394 | # encoded by the filesystem encoding (in strict mode). It can be None if we |
| 395 | # cannot generate such filename. |
Victor Stinner | a0241c8 | 2010-08-15 19:28:21 +0000 | [diff] [blame] | 396 | TESTFN_UNENCODABLE = None |
Victor Stinner | 3d85a6f | 2010-08-13 13:02:04 +0000 | [diff] [blame] | 397 | if os.name in ('nt', 'ce'): |
Victor Stinner | a0241c8 | 2010-08-15 19:28:21 +0000 | [diff] [blame] | 398 | # skip win32s (0) or Windows 9x/ME (1) |
| 399 | if sys.getwindowsversion().platform >= 2: |
Victor Stinner | 8ce7df6 | 2010-09-10 11:19:59 +0000 | [diff] [blame] | 400 | # Different kinds of characters from various languages to minimize the |
| 401 | # probability that the whole name is encodable to MBCS (issue #9819) |
| 402 | TESTFN_UNENCODABLE = TESTFN + "-\u5171\u0141\u2661\u0363\uDC80" |
Victor Stinner | 3d85a6f | 2010-08-13 13:02:04 +0000 | [diff] [blame] | 403 | try: |
Victor Stinner | 09c449c | 2010-08-13 22:23:24 +0000 | [diff] [blame] | 404 | TESTFN_UNENCODABLE.encode(TESTFN_ENCODING) |
Victor Stinner | 3d85a6f | 2010-08-13 13:02:04 +0000 | [diff] [blame] | 405 | except UnicodeEncodeError: |
| 406 | pass |
| 407 | else: |
| 408 | print('WARNING: The filename %r CAN be encoded by the filesystem encoding (%s). ' |
| 409 | 'Unicode filename tests may not be effective' |
Victor Stinner | 09c449c | 2010-08-13 22:23:24 +0000 | [diff] [blame] | 410 | % (TESTFN_UNENCODABLE, TESTFN_ENCODING)) |
| 411 | TESTFN_UNENCODABLE = None |
Victor Stinner | a0241c8 | 2010-08-15 19:28:21 +0000 | [diff] [blame] | 412 | # Mac OS X denies unencodable filenames (invalid utf-8) |
Victor Stinner | 03c9e1d | 2010-08-14 17:35:20 +0000 | [diff] [blame] | 413 | elif sys.platform != 'darwin': |
Victor Stinner | 3d85a6f | 2010-08-13 13:02:04 +0000 | [diff] [blame] | 414 | try: |
| 415 | # ascii and utf-8 cannot encode the byte 0xff |
| 416 | b'\xff'.decode(TESTFN_ENCODING) |
| 417 | except UnicodeDecodeError: |
| 418 | # 0xff will be encoded using the surrogate character u+DCFF |
Victor Stinner | 09c449c | 2010-08-13 22:23:24 +0000 | [diff] [blame] | 419 | TESTFN_UNENCODABLE = TESTFN \ |
Victor Stinner | 3d85a6f | 2010-08-13 13:02:04 +0000 | [diff] [blame] | 420 | + b'-\xff'.decode(TESTFN_ENCODING, 'surrogateescape') |
| 421 | else: |
| 422 | # File system encoding (eg. ISO-8859-* encodings) can encode |
| 423 | # the byte 0xff. Skip some unicode filename tests. |
Victor Stinner | a0241c8 | 2010-08-15 19:28:21 +0000 | [diff] [blame] | 424 | pass |
Neal Norwitz | 26a1eef | 2002-11-03 00:35:53 +0000 | [diff] [blame] | 425 | |
Ezio Melotti | 184bdfb | 2010-02-18 09:37:05 +0000 | [diff] [blame] | 426 | # Save the initial cwd |
| 427 | SAVEDCWD = os.getcwd() |
| 428 | |
| 429 | @contextlib.contextmanager |
Nick Coghlan | d26c18a | 2010-08-17 13:06:11 +0000 | [diff] [blame] | 430 | def temp_cwd(name='tempcwd', quiet=False, path=None): |
Ezio Melotti | 184bdfb | 2010-02-18 09:37:05 +0000 | [diff] [blame] | 431 | """ |
Nick Coghlan | d26c18a | 2010-08-17 13:06:11 +0000 | [diff] [blame] | 432 | Context manager that temporarily changes the CWD. |
Ezio Melotti | 184bdfb | 2010-02-18 09:37:05 +0000 | [diff] [blame] | 433 | |
Nick Coghlan | d26c18a | 2010-08-17 13:06:11 +0000 | [diff] [blame] | 434 | An existing path may be provided as *path*, in which case this |
| 435 | function makes no changes to the file system. |
| 436 | |
| 437 | Otherwise, the new CWD is created in the current directory and it's |
| 438 | named *name*. If *quiet* is False (default) and it's not possible to |
| 439 | create or change the CWD, an error is raised. If it's True, only a |
| 440 | warning is raised and the original CWD is used. |
Ezio Melotti | 184bdfb | 2010-02-18 09:37:05 +0000 | [diff] [blame] | 441 | """ |
| 442 | saved_dir = os.getcwd() |
| 443 | is_temporary = False |
Nick Coghlan | d26c18a | 2010-08-17 13:06:11 +0000 | [diff] [blame] | 444 | if path is None: |
| 445 | path = name |
| 446 | try: |
| 447 | os.mkdir(name) |
| 448 | is_temporary = True |
| 449 | except OSError: |
| 450 | if not quiet: |
| 451 | raise |
| 452 | warnings.warn('tests may fail, unable to create temp CWD ' + name, |
| 453 | RuntimeWarning, stacklevel=3) |
Neal Norwitz | 26a1eef | 2002-11-03 00:35:53 +0000 | [diff] [blame] | 454 | try: |
Nick Coghlan | d26c18a | 2010-08-17 13:06:11 +0000 | [diff] [blame] | 455 | os.chdir(path) |
Ezio Melotti | 184bdfb | 2010-02-18 09:37:05 +0000 | [diff] [blame] | 456 | except OSError: |
| 457 | if not quiet: |
| 458 | raise |
| 459 | warnings.warn('tests may fail, unable to change the CWD to ' + name, |
| 460 | RuntimeWarning, stacklevel=3) |
| 461 | try: |
| 462 | yield os.getcwd() |
| 463 | finally: |
| 464 | os.chdir(saved_dir) |
| 465 | if is_temporary: |
| 466 | rmtree(name) |
| 467 | |
Guido van Rossum | a8f7e59 | 2001-03-13 09:31:07 +0000 | [diff] [blame] | 468 | |
Barry Warsaw | 28a691b | 2010-04-17 00:19:56 +0000 | [diff] [blame] | 469 | @contextlib.contextmanager |
| 470 | def temp_umask(umask): |
| 471 | """Context manager that temporarily sets the process umask.""" |
| 472 | oldmask = os.umask(umask) |
| 473 | try: |
| 474 | yield |
| 475 | finally: |
| 476 | os.umask(oldmask) |
| 477 | |
| 478 | |
Florent Xicluna | f15351d | 2010-03-13 23:24:31 +0000 | [diff] [blame] | 479 | def findfile(file, here=__file__, subdir=None): |
Brett Cannon | f1cfb62 | 2003-05-04 21:15:27 +0000 | [diff] [blame] | 480 | """Try to find a file on sys.path and the working directory. If it is not |
| 481 | found the argument passed to the function is returned (this does not |
| 482 | necessarily signal failure; could still be the legitimate path).""" |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 483 | if os.path.isabs(file): |
| 484 | return file |
Florent Xicluna | f15351d | 2010-03-13 23:24:31 +0000 | [diff] [blame] | 485 | if subdir is not None: |
| 486 | file = os.path.join(subdir, file) |
Fred Drake | 004d5e6 | 2000-10-23 17:22:08 +0000 | [diff] [blame] | 487 | path = sys.path |
| 488 | path = [os.path.dirname(here)] + path |
| 489 | for dn in path: |
| 490 | fn = os.path.join(dn, file) |
| 491 | if os.path.exists(fn): return fn |
| 492 | return file |
Marc-André Lemburg | 3661908 | 2001-01-17 19:11:13 +0000 | [diff] [blame] | 493 | |
Tim Peters | 2f228e7 | 2001-05-13 00:19:31 +0000 | [diff] [blame] | 494 | def sortdict(dict): |
| 495 | "Like repr(dict), but in sorted order." |
Guido van Rossum | cc2b016 | 2007-02-11 06:12:03 +0000 | [diff] [blame] | 496 | items = sorted(dict.items()) |
Tim Peters | 2f228e7 | 2001-05-13 00:19:31 +0000 | [diff] [blame] | 497 | reprpairs = ["%r: %r" % pair for pair in items] |
| 498 | withcommas = ", ".join(reprpairs) |
| 499 | return "{%s}" % withcommas |
| 500 | |
Benjamin Peterson | 7522c74 | 2009-01-19 21:00:09 +0000 | [diff] [blame] | 501 | def make_bad_fd(): |
| 502 | """ |
| 503 | Create an invalid file descriptor by opening and closing a file and return |
| 504 | its fd. |
| 505 | """ |
| 506 | file = open(TESTFN, "wb") |
| 507 | try: |
| 508 | return file.fileno() |
| 509 | finally: |
| 510 | file.close() |
| 511 | unlink(TESTFN) |
| 512 | |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 513 | def check_syntax_error(testcase, statement): |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 514 | testcase.assertRaises(SyntaxError, compile, statement, |
| 515 | '<test string>', 'exec') |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 516 | |
Martin v. Löwis | 234a34a | 2007-08-30 20:58:02 +0000 | [diff] [blame] | 517 | def open_urlresource(url, *args, **kw): |
Jeremy Hylton | 1afc169 | 2008-06-18 20:49:58 +0000 | [diff] [blame] | 518 | import urllib.request, urllib.parse |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 519 | |
Florent Xicluna | f089fd6 | 2010-03-19 14:25:03 +0000 | [diff] [blame] | 520 | check = kw.pop('check', None) |
| 521 | |
Jeremy Hylton | 1afc169 | 2008-06-18 20:49:58 +0000 | [diff] [blame] | 522 | filename = urllib.parse.urlparse(url)[2].split('/')[-1] # '/': it's URL! |
Hye-Shik Chang | aaa2f1d | 2005-12-10 17:44:27 +0000 | [diff] [blame] | 523 | |
Alexandre Vassalotti | 711ed4a | 2009-07-17 10:42:05 +0000 | [diff] [blame] | 524 | fn = os.path.join(os.path.dirname(__file__), "data", filename) |
Florent Xicluna | f089fd6 | 2010-03-19 14:25:03 +0000 | [diff] [blame] | 525 | |
| 526 | def check_valid_file(fn): |
| 527 | f = open(fn, *args, **kw) |
| 528 | if check is None: |
| 529 | return f |
| 530 | elif check(f): |
| 531 | f.seek(0) |
| 532 | return f |
| 533 | f.close() |
| 534 | |
Alexandre Vassalotti | 711ed4a | 2009-07-17 10:42:05 +0000 | [diff] [blame] | 535 | if os.path.exists(fn): |
Florent Xicluna | f089fd6 | 2010-03-19 14:25:03 +0000 | [diff] [blame] | 536 | f = check_valid_file(fn) |
| 537 | if f is not None: |
| 538 | return f |
| 539 | unlink(fn) |
| 540 | |
| 541 | # Verify the requirement before downloading the file |
| 542 | requires('urlfetch') |
Hye-Shik Chang | aaa2f1d | 2005-12-10 17:44:27 +0000 | [diff] [blame] | 543 | |
Guido van Rossum | be19ed7 | 2007-02-09 05:37:30 +0000 | [diff] [blame] | 544 | print('\tfetching %s ...' % url, file=get_original_stdout()) |
Antoine Pitrou | fd0680b | 2009-11-01 22:13:48 +0000 | [diff] [blame] | 545 | f = urllib.request.urlopen(url, timeout=15) |
| 546 | try: |
| 547 | with open(fn, "wb") as out: |
| 548 | s = f.read() |
| 549 | while s: |
| 550 | out.write(s) |
| 551 | s = f.read() |
| 552 | finally: |
| 553 | f.close() |
Florent Xicluna | f089fd6 | 2010-03-19 14:25:03 +0000 | [diff] [blame] | 554 | |
| 555 | f = check_valid_file(fn) |
| 556 | if f is not None: |
| 557 | return f |
| 558 | raise TestFailed('invalid resource "%s"' % fn) |
| 559 | |
Thomas Wouters | 9fe394c | 2007-02-05 01:24:16 +0000 | [diff] [blame] | 560 | |
Benjamin Peterson | fcf5d63 | 2008-10-16 23:24:44 +0000 | [diff] [blame] | 561 | class WarningsRecorder(object): |
| 562 | """Convenience wrapper for the warnings list returned on |
| 563 | entry to the warnings.catch_warnings() context manager. |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 564 | """ |
Benjamin Peterson | fcf5d63 | 2008-10-16 23:24:44 +0000 | [diff] [blame] | 565 | def __init__(self, warnings_list): |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 566 | self._warnings = warnings_list |
| 567 | self._last = 0 |
Benjamin Peterson | fcf5d63 | 2008-10-16 23:24:44 +0000 | [diff] [blame] | 568 | |
| 569 | def __getattr__(self, attr): |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 570 | if len(self._warnings) > self._last: |
| 571 | return getattr(self._warnings[-1], attr) |
Benjamin Peterson | fcf5d63 | 2008-10-16 23:24:44 +0000 | [diff] [blame] | 572 | elif attr in warnings.WarningMessage._WARNING_DETAILS: |
| 573 | return None |
| 574 | raise AttributeError("%r has no attribute %r" % (self, attr)) |
| 575 | |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 576 | @property |
| 577 | def warnings(self): |
| 578 | return self._warnings[self._last:] |
| 579 | |
Benjamin Peterson | fcf5d63 | 2008-10-16 23:24:44 +0000 | [diff] [blame] | 580 | def reset(self): |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 581 | self._last = len(self._warnings) |
| 582 | |
| 583 | |
| 584 | def _filterwarnings(filters, quiet=False): |
| 585 | """Catch the warnings, then check if all the expected |
| 586 | warnings have been raised and re-raise unexpected warnings. |
| 587 | If 'quiet' is True, only re-raise the unexpected warnings. |
| 588 | """ |
| 589 | # Clear the warning registry of the calling module |
| 590 | # in order to re-raise the warnings. |
| 591 | frame = sys._getframe(2) |
| 592 | registry = frame.f_globals.get('__warningregistry__') |
| 593 | if registry: |
| 594 | registry.clear() |
| 595 | with warnings.catch_warnings(record=True) as w: |
| 596 | # Set filter "always" to record all warnings. Because |
| 597 | # test_warnings swap the module, we need to look up in |
| 598 | # the sys.modules dictionary. |
| 599 | sys.modules['warnings'].simplefilter("always") |
| 600 | yield WarningsRecorder(w) |
| 601 | # Filter the recorded warnings |
Antoine Pitrou | 31e08a4 | 2010-10-29 11:54:03 +0000 | [diff] [blame] | 602 | reraise = list(w) |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 603 | missing = [] |
| 604 | for msg, cat in filters: |
| 605 | seen = False |
Antoine Pitrou | 31e08a4 | 2010-10-29 11:54:03 +0000 | [diff] [blame] | 606 | for w in reraise[:]: |
| 607 | warning = w.message |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 608 | # Filter out the matching messages |
Antoine Pitrou | 31e08a4 | 2010-10-29 11:54:03 +0000 | [diff] [blame] | 609 | if (re.match(msg, str(warning), re.I) and |
| 610 | issubclass(warning.__class__, cat)): |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 611 | seen = True |
Antoine Pitrou | 31e08a4 | 2010-10-29 11:54:03 +0000 | [diff] [blame] | 612 | reraise.remove(w) |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 613 | if not seen and not quiet: |
| 614 | # This filter caught nothing |
| 615 | missing.append((msg, cat.__name__)) |
| 616 | if reraise: |
Antoine Pitrou | 31e08a4 | 2010-10-29 11:54:03 +0000 | [diff] [blame] | 617 | raise AssertionError("unhandled warning %s" % reraise[0]) |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 618 | if missing: |
| 619 | raise AssertionError("filter (%r, %s) did not catch any warning" % |
| 620 | missing[0]) |
| 621 | |
Benjamin Peterson | fcf5d63 | 2008-10-16 23:24:44 +0000 | [diff] [blame] | 622 | |
| 623 | @contextlib.contextmanager |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 624 | def check_warnings(*filters, **kwargs): |
| 625 | """Context manager to silence warnings. |
| 626 | |
| 627 | Accept 2-tuples as positional arguments: |
| 628 | ("message regexp", WarningCategory) |
| 629 | |
| 630 | Optional argument: |
| 631 | - if 'quiet' is True, it does not fail if a filter catches nothing |
Florent Xicluna | 53b506be | 2010-03-18 20:00:57 +0000 | [diff] [blame] | 632 | (default True without argument, |
| 633 | default False if some filters are defined) |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 634 | |
| 635 | Without argument, it defaults to: |
Florent Xicluna | 53b506be | 2010-03-18 20:00:57 +0000 | [diff] [blame] | 636 | check_warnings(("", Warning), quiet=True) |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 637 | """ |
Florent Xicluna | 53b506be | 2010-03-18 20:00:57 +0000 | [diff] [blame] | 638 | quiet = kwargs.get('quiet') |
Florent Xicluna | b14930c | 2010-03-13 15:26:44 +0000 | [diff] [blame] | 639 | if not filters: |
| 640 | filters = (("", Warning),) |
Florent Xicluna | 53b506be | 2010-03-18 20:00:57 +0000 | [diff] [blame] | 641 | # Preserve backward compatibility |
| 642 | if quiet is None: |
| 643 | quiet = True |
| 644 | return _filterwarnings(filters, quiet) |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 645 | |
Alexandre Vassalotti | 5f8ced2 | 2008-05-16 00:03:33 +0000 | [diff] [blame] | 646 | |
| 647 | class CleanImport(object): |
| 648 | """Context manager to force import to return a new module reference. |
| 649 | |
| 650 | This is useful for testing module-level behaviours, such as |
Nick Coghlan | b130493 | 2008-07-13 12:25:08 +0000 | [diff] [blame] | 651 | the emission of a DeprecationWarning on import. |
Alexandre Vassalotti | 5f8ced2 | 2008-05-16 00:03:33 +0000 | [diff] [blame] | 652 | |
| 653 | Use like this: |
| 654 | |
| 655 | with CleanImport("foo"): |
Brett Cannon | ddb5e70 | 2010-02-03 22:16:11 +0000 | [diff] [blame] | 656 | importlib.import_module("foo") # new reference |
Alexandre Vassalotti | 5f8ced2 | 2008-05-16 00:03:33 +0000 | [diff] [blame] | 657 | """ |
| 658 | |
| 659 | def __init__(self, *module_names): |
| 660 | self.original_modules = sys.modules.copy() |
| 661 | for module_name in module_names: |
| 662 | if module_name in sys.modules: |
| 663 | module = sys.modules[module_name] |
| 664 | # It is possible that module_name is just an alias for |
| 665 | # another module (e.g. stub for modules renamed in 3.x). |
| 666 | # In that case, we also need delete the real module to clear |
| 667 | # the import cache. |
| 668 | if module.__name__ != module_name: |
| 669 | del sys.modules[module.__name__] |
| 670 | del sys.modules[module_name] |
| 671 | |
| 672 | def __enter__(self): |
| 673 | return self |
| 674 | |
| 675 | def __exit__(self, *ignore_exc): |
| 676 | sys.modules.update(self.original_modules) |
| 677 | |
| 678 | |
Walter Dörwald | 155374d | 2009-05-01 19:58:58 +0000 | [diff] [blame] | 679 | class EnvironmentVarGuard(collections.MutableMapping): |
Thomas Wouters | 902d6eb | 2007-01-09 23:18:33 +0000 | [diff] [blame] | 680 | |
| 681 | """Class to help protect the environment variable properly. Can be used as |
| 682 | a context manager.""" |
| 683 | |
| 684 | def __init__(self): |
Walter Dörwald | 155374d | 2009-05-01 19:58:58 +0000 | [diff] [blame] | 685 | self._environ = os.environ |
Walter Dörwald | 4ba8013 | 2009-04-25 12:48:43 +0000 | [diff] [blame] | 686 | self._changed = {} |
Thomas Wouters | 902d6eb | 2007-01-09 23:18:33 +0000 | [diff] [blame] | 687 | |
Walter Dörwald | 155374d | 2009-05-01 19:58:58 +0000 | [diff] [blame] | 688 | def __getitem__(self, envvar): |
| 689 | return self._environ[envvar] |
| 690 | |
| 691 | def __setitem__(self, envvar, value): |
Walter Dörwald | 4ba8013 | 2009-04-25 12:48:43 +0000 | [diff] [blame] | 692 | # Remember the initial value on the first access |
| 693 | if envvar not in self._changed: |
Walter Dörwald | 155374d | 2009-05-01 19:58:58 +0000 | [diff] [blame] | 694 | self._changed[envvar] = self._environ.get(envvar) |
| 695 | self._environ[envvar] = value |
| 696 | |
| 697 | def __delitem__(self, envvar): |
| 698 | # Remember the initial value on the first access |
| 699 | if envvar not in self._changed: |
| 700 | self._changed[envvar] = self._environ.get(envvar) |
| 701 | if envvar in self._environ: |
| 702 | del self._environ[envvar] |
| 703 | |
| 704 | def keys(self): |
| 705 | return self._environ.keys() |
| 706 | |
| 707 | def __iter__(self): |
| 708 | return iter(self._environ) |
| 709 | |
| 710 | def __len__(self): |
| 711 | return len(self._environ) |
| 712 | |
| 713 | def set(self, envvar, value): |
| 714 | self[envvar] = value |
Thomas Wouters | 902d6eb | 2007-01-09 23:18:33 +0000 | [diff] [blame] | 715 | |
| 716 | def unset(self, envvar): |
Walter Dörwald | 155374d | 2009-05-01 19:58:58 +0000 | [diff] [blame] | 717 | del self[envvar] |
Thomas Wouters | 902d6eb | 2007-01-09 23:18:33 +0000 | [diff] [blame] | 718 | |
| 719 | def __enter__(self): |
| 720 | return self |
| 721 | |
| 722 | def __exit__(self, *ignore_exc): |
Walter Dörwald | 4ba8013 | 2009-04-25 12:48:43 +0000 | [diff] [blame] | 723 | for (k, v) in self._changed.items(): |
| 724 | if v is None: |
Walter Dörwald | 155374d | 2009-05-01 19:58:58 +0000 | [diff] [blame] | 725 | if k in self._environ: |
| 726 | del self._environ[k] |
Walter Dörwald | 4ba8013 | 2009-04-25 12:48:43 +0000 | [diff] [blame] | 727 | else: |
Walter Dörwald | 155374d | 2009-05-01 19:58:58 +0000 | [diff] [blame] | 728 | self._environ[k] = v |
Nick Coghlan | 6ead552 | 2009-10-18 13:19:33 +0000 | [diff] [blame] | 729 | os.environ = self._environ |
| 730 | |
| 731 | |
| 732 | class DirsOnSysPath(object): |
| 733 | """Context manager to temporarily add directories to sys.path. |
| 734 | |
| 735 | This makes a copy of sys.path, appends any directories given |
| 736 | as positional arguments, then reverts sys.path to the copied |
| 737 | settings when the context ends. |
| 738 | |
| 739 | Note that *all* sys.path modifications in the body of the |
| 740 | context manager, including replacement of the object, |
| 741 | will be reverted at the end of the block. |
| 742 | """ |
| 743 | |
| 744 | def __init__(self, *paths): |
| 745 | self.original_value = sys.path[:] |
| 746 | self.original_object = sys.path |
| 747 | sys.path.extend(paths) |
| 748 | |
| 749 | def __enter__(self): |
| 750 | return self |
| 751 | |
| 752 | def __exit__(self, *ignore_exc): |
| 753 | sys.path = self.original_object |
| 754 | sys.path[:] = self.original_value |
Walter Dörwald | 155374d | 2009-05-01 19:58:58 +0000 | [diff] [blame] | 755 | |
Thomas Wouters | 902d6eb | 2007-01-09 23:18:33 +0000 | [diff] [blame] | 756 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 757 | class TransientResource(object): |
| 758 | |
| 759 | """Raise ResourceDenied if an exception is raised while the context manager |
| 760 | is in effect that matches the specified exception and attributes.""" |
| 761 | |
| 762 | def __init__(self, exc, **kwargs): |
| 763 | self.exc = exc |
| 764 | self.attrs = kwargs |
| 765 | |
| 766 | def __enter__(self): |
| 767 | return self |
| 768 | |
| 769 | def __exit__(self, type_=None, value=None, traceback=None): |
| 770 | """If type_ is a subclass of self.exc and value has attributes matching |
| 771 | self.attrs, raise ResourceDenied. Otherwise let the exception |
| 772 | propagate (if any).""" |
| 773 | if type_ is not None and issubclass(self.exc, type_): |
| 774 | for attr, attr_value in self.attrs.items(): |
| 775 | if not hasattr(value, attr): |
| 776 | break |
| 777 | if getattr(value, attr) != attr_value: |
| 778 | break |
| 779 | else: |
| 780 | raise ResourceDenied("an optional resource is not available") |
| 781 | |
Raymond Hettinger | 686057b | 2009-06-04 00:11:54 +0000 | [diff] [blame] | 782 | # Context managers that raise ResourceDenied when various issues |
| 783 | # with the Internet connection manifest themselves as exceptions. |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 784 | # XXX deprecate these and use transient_internet() instead |
Raymond Hettinger | 686057b | 2009-06-04 00:11:54 +0000 | [diff] [blame] | 785 | time_out = TransientResource(IOError, errno=errno.ETIMEDOUT) |
| 786 | socket_peer_reset = TransientResource(socket.error, errno=errno.ECONNRESET) |
| 787 | ioerror_peer_reset = TransientResource(IOError, errno=errno.ECONNRESET) |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 788 | |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 789 | |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 790 | @contextlib.contextmanager |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 791 | def transient_internet(resource_name, *, timeout=30.0, errnos=()): |
Antoine Pitrou | fec12ff | 2010-04-21 19:46:23 +0000 | [diff] [blame] | 792 | """Return a context manager that raises ResourceDenied when various issues |
| 793 | with the Internet connection manifest themselves as exceptions.""" |
Antoine Pitrou | 8bc0903 | 2010-09-07 21:09:09 +0000 | [diff] [blame] | 794 | default_errnos = [ |
| 795 | ('ECONNREFUSED', 111), |
| 796 | ('ECONNRESET', 104), |
| 797 | ('ENETUNREACH', 101), |
| 798 | ('ETIMEDOUT', 110), |
| 799 | ] |
Antoine Pitrou | 2673c5b | 2010-09-07 21:43:31 +0000 | [diff] [blame] | 800 | default_gai_errnos = [ |
| 801 | ('EAI_NONAME', -2), |
| 802 | ('EAI_NODATA', -5), |
| 803 | ] |
Antoine Pitrou | 8bc0903 | 2010-09-07 21:09:09 +0000 | [diff] [blame] | 804 | |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 805 | denied = ResourceDenied("Resource '%s' is not available" % resource_name) |
Antoine Pitrou | 8bc0903 | 2010-09-07 21:09:09 +0000 | [diff] [blame] | 806 | captured_errnos = errnos |
Antoine Pitrou | 2673c5b | 2010-09-07 21:43:31 +0000 | [diff] [blame] | 807 | gai_errnos = [] |
Antoine Pitrou | 8bc0903 | 2010-09-07 21:09:09 +0000 | [diff] [blame] | 808 | if not captured_errnos: |
| 809 | captured_errnos = [getattr(errno, name, num) |
| 810 | for (name, num) in default_errnos] |
Antoine Pitrou | 2673c5b | 2010-09-07 21:43:31 +0000 | [diff] [blame] | 811 | gai_errnos = [getattr(socket, name, num) |
| 812 | for (name, num) in default_gai_errnos] |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 813 | |
| 814 | def filter_error(err): |
Antoine Pitrou | 2673c5b | 2010-09-07 21:43:31 +0000 | [diff] [blame] | 815 | n = getattr(err, 'errno', None) |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 816 | if (isinstance(err, socket.timeout) or |
Antoine Pitrou | 2673c5b | 2010-09-07 21:43:31 +0000 | [diff] [blame] | 817 | (isinstance(err, socket.gaierror) and n in gai_errnos) or |
| 818 | n in captured_errnos): |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 819 | if not verbose: |
| 820 | sys.stderr.write(denied.args[0] + "\n") |
| 821 | raise denied from err |
| 822 | |
| 823 | old_timeout = socket.getdefaulttimeout() |
| 824 | try: |
| 825 | if timeout is not None: |
| 826 | socket.setdefaulttimeout(timeout) |
Antoine Pitrou | fec12ff | 2010-04-21 19:46:23 +0000 | [diff] [blame] | 827 | yield |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 828 | except IOError as err: |
Antoine Pitrou | 8bc0903 | 2010-09-07 21:09:09 +0000 | [diff] [blame] | 829 | # urllib can wrap original socket errors multiple times (!), we must |
| 830 | # unwrap to get at the original error. |
| 831 | while True: |
| 832 | a = err.args |
| 833 | if len(a) >= 1 and isinstance(a[0], IOError): |
| 834 | err = a[0] |
| 835 | # The error can also be wrapped as args[1]: |
| 836 | # except socket.error as msg: |
| 837 | # raise IOError('socket error', msg).with_traceback(sys.exc_info()[2]) |
| 838 | elif len(a) >= 2 and isinstance(a[1], IOError): |
| 839 | err = a[1] |
| 840 | else: |
| 841 | break |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 842 | filter_error(err) |
Antoine Pitrou | a88c83c | 2010-09-07 20:42:19 +0000 | [diff] [blame] | 843 | raise |
| 844 | # XXX should we catch generic exceptions and look for their |
| 845 | # __cause__ or __context__? |
| 846 | finally: |
| 847 | socket.setdefaulttimeout(old_timeout) |
Antoine Pitrou | fec12ff | 2010-04-21 19:46:23 +0000 | [diff] [blame] | 848 | |
| 849 | |
| 850 | @contextlib.contextmanager |
Benjamin Peterson | ad9d48d | 2008-04-02 21:49:44 +0000 | [diff] [blame] | 851 | def captured_output(stream_name): |
| 852 | """Run the 'with' statement body using a StringIO object in place of a |
| 853 | specific attribute on the sys module. |
| 854 | Example use (with 'stream_name=stdout'):: |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 855 | |
| 856 | with captured_stdout() as s: |
Neal Norwitz | 752abd0 | 2008-05-13 04:55:24 +0000 | [diff] [blame] | 857 | print("hello") |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 858 | assert s.getvalue() == "hello" |
| 859 | """ |
| 860 | import io |
Benjamin Peterson | ad9d48d | 2008-04-02 21:49:44 +0000 | [diff] [blame] | 861 | orig_stdout = getattr(sys, stream_name) |
| 862 | setattr(sys, stream_name, io.StringIO()) |
Christian Heimes | 81ee3ef | 2008-05-04 22:42:01 +0000 | [diff] [blame] | 863 | try: |
| 864 | yield getattr(sys, stream_name) |
| 865 | finally: |
| 866 | setattr(sys, stream_name, orig_stdout) |
Benjamin Peterson | ad9d48d | 2008-04-02 21:49:44 +0000 | [diff] [blame] | 867 | |
| 868 | def captured_stdout(): |
| 869 | return captured_output("stdout") |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 870 | |
Nick Coghlan | 6ead552 | 2009-10-18 13:19:33 +0000 | [diff] [blame] | 871 | def captured_stdin(): |
| 872 | return captured_output("stdin") |
| 873 | |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 874 | def gc_collect(): |
| 875 | """Force as many objects as possible to be collected. |
| 876 | |
| 877 | In non-CPython implementations of Python, this is needed because timely |
| 878 | deallocation is not guaranteed by the garbage collector. (Even in CPython |
| 879 | this can be the case in case of reference cycles.) This means that __del__ |
| 880 | methods may be called later than expected and weakrefs may remain alive for |
| 881 | longer than expected. This function tries its best to force all garbage |
| 882 | objects to disappear. |
| 883 | """ |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 884 | gc.collect() |
Benjamin Peterson | a6590e8 | 2010-04-11 21:22:10 +0000 | [diff] [blame] | 885 | if is_jython: |
| 886 | time.sleep(0.1) |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 887 | gc.collect() |
| 888 | gc.collect() |
| 889 | |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 890 | |
Benjamin Peterson | 65c66ab | 2010-10-29 21:31:35 +0000 | [diff] [blame] | 891 | def python_is_optimized(): |
| 892 | """Find if Python was built with optimizations.""" |
Antoine Pitrou | 6447454 | 2010-10-31 11:34:47 +0000 | [diff] [blame] | 893 | cflags = sysconfig.get_config_var('PY_CFLAGS') or '' |
Benjamin Peterson | 65c66ab | 2010-10-29 21:31:35 +0000 | [diff] [blame] | 894 | final_opt = "" |
| 895 | for opt in cflags.split(): |
| 896 | if opt.startswith('-O'): |
| 897 | final_opt = opt |
| 898 | return final_opt and final_opt != '-O0' |
| 899 | |
| 900 | |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 901 | #======================================================================= |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 902 | # Decorator for running a function in a different locale, correctly resetting |
| 903 | # it afterwards. |
| 904 | |
| 905 | def run_with_locale(catstr, *locales): |
| 906 | def decorator(func): |
| 907 | def inner(*args, **kwds): |
| 908 | try: |
| 909 | import locale |
| 910 | category = getattr(locale, catstr) |
| 911 | orig_locale = locale.setlocale(category) |
| 912 | except AttributeError: |
| 913 | # if the test author gives us an invalid category string |
| 914 | raise |
| 915 | except: |
| 916 | # cannot retrieve original locale, so do nothing |
| 917 | locale = orig_locale = None |
| 918 | else: |
| 919 | for loc in locales: |
| 920 | try: |
| 921 | locale.setlocale(category, loc) |
| 922 | break |
| 923 | except: |
| 924 | pass |
| 925 | |
| 926 | # now run the function, resetting the locale on exceptions |
| 927 | try: |
| 928 | return func(*args, **kwds) |
| 929 | finally: |
| 930 | if locale and orig_locale: |
| 931 | locale.setlocale(category, orig_locale) |
Neal Norwitz | 221085d | 2007-02-25 20:55:47 +0000 | [diff] [blame] | 932 | inner.__name__ = func.__name__ |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 933 | inner.__doc__ = func.__doc__ |
| 934 | return inner |
| 935 | return decorator |
| 936 | |
| 937 | #======================================================================= |
Georg Brandl | db02844 | 2008-02-05 20:48:58 +0000 | [diff] [blame] | 938 | # Big-memory-test support. Separate from 'resources' because memory use |
| 939 | # should be configurable. |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 940 | |
| 941 | # Some handy shorthands. Note that these are used for byte-limits as well |
| 942 | # as size-limits, in the various bigmem tests |
| 943 | _1M = 1024*1024 |
| 944 | _1G = 1024 * _1M |
| 945 | _2G = 2 * _1G |
Neal Norwitz | 3ce5d92 | 2008-08-24 07:08:55 +0000 | [diff] [blame] | 946 | _4G = 4 * _1G |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 947 | |
Thomas Wouters | d2cf20e | 2007-08-30 22:57:53 +0000 | [diff] [blame] | 948 | MAX_Py_ssize_t = sys.maxsize |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 949 | |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 950 | def set_memlimit(limit): |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 951 | global max_memuse |
Neal Norwitz | 3ce5d92 | 2008-08-24 07:08:55 +0000 | [diff] [blame] | 952 | global real_max_memuse |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 953 | sizes = { |
| 954 | 'k': 1024, |
| 955 | 'm': _1M, |
| 956 | 'g': _1G, |
| 957 | 't': 1024*_1G, |
| 958 | } |
| 959 | m = re.match(r'(\d+(\.\d+)?) (K|M|G|T)b?$', limit, |
| 960 | re.IGNORECASE | re.VERBOSE) |
| 961 | if m is None: |
| 962 | raise ValueError('Invalid memory limit %r' % (limit,)) |
| 963 | memlimit = int(float(m.group(1)) * sizes[m.group(3).lower()]) |
Neal Norwitz | 3ce5d92 | 2008-08-24 07:08:55 +0000 | [diff] [blame] | 964 | real_max_memuse = memlimit |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 965 | if memlimit > MAX_Py_ssize_t: |
| 966 | memlimit = MAX_Py_ssize_t |
| 967 | if memlimit < _2G - 1: |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 968 | raise ValueError('Memory limit %r too low to be useful' % (limit,)) |
| 969 | max_memuse = memlimit |
| 970 | |
| 971 | def bigmemtest(minsize, memuse, overhead=5*_1M): |
| 972 | """Decorator for bigmem tests. |
| 973 | |
| 974 | 'minsize' is the minimum useful size for the test (in arbitrary, |
| 975 | test-interpreted units.) 'memuse' is the number of 'bytes per size' for |
| 976 | the test, or a good estimate of it. 'overhead' specifies fixed overhead, |
Christian Heimes | 33fe809 | 2008-04-13 13:53:33 +0000 | [diff] [blame] | 977 | independent of the testsize, and defaults to 5Mb. |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 978 | |
| 979 | The decorator tries to guess a good value for 'size' and passes it to |
| 980 | the decorated test function. If minsize * memuse is more than the |
| 981 | allowed memory use (as defined by max_memuse), the test is skipped. |
| 982 | Otherwise, minsize is adjusted upward to use up to max_memuse. |
| 983 | """ |
| 984 | def decorator(f): |
| 985 | def wrapper(self): |
Antoine Pitrou | 7cdb495 | 2009-03-07 23:40:49 +0000 | [diff] [blame] | 986 | # Retrieve values in case someone decided to adjust them |
| 987 | minsize = wrapper.minsize |
| 988 | memuse = wrapper.memuse |
| 989 | overhead = wrapper.overhead |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 990 | if not max_memuse: |
| 991 | # If max_memuse is 0 (the default), |
| 992 | # we still want to run the tests with size set to a few kb, |
| 993 | # to make sure they work. We still want to avoid using |
| 994 | # too much memory, though, but we do that noisily. |
| 995 | maxsize = 5147 |
Benjamin Peterson | 46d4440 | 2009-07-01 00:45:43 +0000 | [diff] [blame] | 996 | self.assertFalse(maxsize * memuse + overhead > 20 * _1M) |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 997 | else: |
| 998 | maxsize = int((max_memuse - overhead) / memuse) |
| 999 | if maxsize < minsize: |
| 1000 | # Really ought to print 'test skipped' or something |
| 1001 | if verbose: |
| 1002 | sys.stderr.write("Skipping %s because of memory " |
| 1003 | "constraint\n" % (f.__name__,)) |
| 1004 | return |
| 1005 | # Try to keep some breathing room in memory use |
| 1006 | maxsize = max(maxsize - 50 * _1M, minsize) |
| 1007 | return f(self, maxsize) |
| 1008 | wrapper.minsize = minsize |
| 1009 | wrapper.memuse = memuse |
| 1010 | wrapper.overhead = overhead |
| 1011 | return wrapper |
| 1012 | return decorator |
| 1013 | |
Neal Norwitz | 3ce5d92 | 2008-08-24 07:08:55 +0000 | [diff] [blame] | 1014 | def precisionbigmemtest(size, memuse, overhead=5*_1M): |
| 1015 | def decorator(f): |
| 1016 | def wrapper(self): |
Antoine Pitrou | 7cdb495 | 2009-03-07 23:40:49 +0000 | [diff] [blame] | 1017 | size = wrapper.size |
| 1018 | memuse = wrapper.memuse |
| 1019 | overhead = wrapper.overhead |
Neal Norwitz | 3ce5d92 | 2008-08-24 07:08:55 +0000 | [diff] [blame] | 1020 | if not real_max_memuse: |
| 1021 | maxsize = 5147 |
| 1022 | else: |
| 1023 | maxsize = size |
| 1024 | |
| 1025 | if real_max_memuse and real_max_memuse < maxsize * memuse: |
| 1026 | if verbose: |
| 1027 | sys.stderr.write("Skipping %s because of memory " |
| 1028 | "constraint\n" % (f.__name__,)) |
| 1029 | return |
| 1030 | |
| 1031 | return f(self, maxsize) |
| 1032 | wrapper.size = size |
| 1033 | wrapper.memuse = memuse |
| 1034 | wrapper.overhead = overhead |
| 1035 | return wrapper |
| 1036 | return decorator |
| 1037 | |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1038 | def bigaddrspacetest(f): |
| 1039 | """Decorator for tests that fill the address space.""" |
| 1040 | def wrapper(self): |
| 1041 | if max_memuse < MAX_Py_ssize_t: |
| 1042 | if verbose: |
| 1043 | sys.stderr.write("Skipping %s because of memory " |
| 1044 | "constraint\n" % (f.__name__,)) |
| 1045 | else: |
| 1046 | return f(self) |
| 1047 | return wrapper |
| 1048 | |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 1049 | #======================================================================= |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1050 | # unittest integration. |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 1051 | |
Steve Purcell | 5ddd1a8 | 2001-03-22 08:45:36 +0000 | [diff] [blame] | 1052 | class BasicTestRunner: |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 1053 | def run(self, test): |
Steve Purcell | 5ddd1a8 | 2001-03-22 08:45:36 +0000 | [diff] [blame] | 1054 | result = unittest.TestResult() |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 1055 | test(result) |
| 1056 | return result |
| 1057 | |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 1058 | def _id(obj): |
| 1059 | return obj |
| 1060 | |
| 1061 | def requires_resource(resource): |
Antoine Pitrou | 5bc4fa7 | 2010-10-14 15:34:31 +0000 | [diff] [blame] | 1062 | if is_resource_enabled(resource): |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 1063 | return _id |
| 1064 | else: |
| 1065 | return unittest.skip("resource {0!r} is not enabled".format(resource)) |
| 1066 | |
| 1067 | def cpython_only(test): |
| 1068 | """ |
| 1069 | Decorator for tests only applicable on CPython. |
| 1070 | """ |
| 1071 | return impl_detail(cpython=True)(test) |
| 1072 | |
| 1073 | def impl_detail(msg=None, **guards): |
| 1074 | if check_impl_detail(**guards): |
| 1075 | return _id |
| 1076 | if msg is None: |
| 1077 | guardnames, default = _parse_guards(guards) |
| 1078 | if default: |
| 1079 | msg = "implementation detail not available on {0}" |
| 1080 | else: |
| 1081 | msg = "implementation detail specific to {0}" |
| 1082 | guardnames = sorted(guardnames.keys()) |
| 1083 | msg = msg.format(' or '.join(guardnames)) |
| 1084 | return unittest.skip(msg) |
| 1085 | |
| 1086 | def _parse_guards(guards): |
| 1087 | # Returns a tuple ({platform_name: run_me}, default_value) |
| 1088 | if not guards: |
| 1089 | return ({'cpython': True}, False) |
Eric Smith | 886b40a | 2009-04-26 21:26:45 +0000 | [diff] [blame] | 1090 | is_true = list(guards.values())[0] |
| 1091 | assert list(guards.values()) == [is_true] * len(guards) # all True or all False |
Benjamin Peterson | e549ead | 2009-03-28 21:42:05 +0000 | [diff] [blame] | 1092 | return (guards, not is_true) |
| 1093 | |
| 1094 | # Use the following check to guard CPython's implementation-specific tests -- |
| 1095 | # or to run them only on the implementation(s) guarded by the arguments. |
| 1096 | def check_impl_detail(**guards): |
| 1097 | """This function returns True or False depending on the host platform. |
| 1098 | Examples: |
| 1099 | if check_impl_detail(): # only on CPython (default) |
| 1100 | if check_impl_detail(jython=True): # only on Jython |
| 1101 | if check_impl_detail(cpython=False): # everywhere except on CPython |
| 1102 | """ |
| 1103 | guards, default = _parse_guards(guards) |
| 1104 | return guards.get(platform.python_implementation().lower(), default) |
| 1105 | |
| 1106 | |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 1107 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1108 | def _run_suite(suite): |
Barry Warsaw | c88425e | 2001-09-20 06:31:22 +0000 | [diff] [blame] | 1109 | """Run tests from a unittest.TestSuite-derived class.""" |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 1110 | if verbose: |
Victor Stinner | f58087b | 2010-05-02 17:24:51 +0000 | [diff] [blame] | 1111 | runner = unittest.TextTestRunner(sys.stdout, verbosity=2) |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 1112 | else: |
Steve Purcell | 5ddd1a8 | 2001-03-22 08:45:36 +0000 | [diff] [blame] | 1113 | runner = BasicTestRunner() |
Fred Drake | cd1b1dd | 2001-03-21 18:26:33 +0000 | [diff] [blame] | 1114 | |
Steve Purcell | 5ddd1a8 | 2001-03-22 08:45:36 +0000 | [diff] [blame] | 1115 | result = runner.run(suite) |
| 1116 | if not result.wasSuccessful(): |
Fred Drake | 14f6c18 | 2001-07-16 18:51:32 +0000 | [diff] [blame] | 1117 | if len(result.errors) == 1 and not result.failures: |
| 1118 | err = result.errors[0][1] |
| 1119 | elif len(result.failures) == 1 and not result.errors: |
| 1120 | err = result.failures[0][1] |
| 1121 | else: |
R. David Murray | 723357e | 2009-10-19 18:06:17 +0000 | [diff] [blame] | 1122 | err = "multiple errors occurred" |
| 1123 | if not verbose: err += "; run in verbose mode for details" |
Tim Peters | 2d84f2c | 2001-09-08 03:37:56 +0000 | [diff] [blame] | 1124 | raise TestFailed(err) |
Tim Peters | a0a6222 | 2001-09-09 06:12:01 +0000 | [diff] [blame] | 1125 | |
Barry Warsaw | c10d690 | 2001-09-20 06:30:41 +0000 | [diff] [blame] | 1126 | |
Walter Dörwald | 21d3a32 | 2003-05-01 17:45:56 +0000 | [diff] [blame] | 1127 | def run_unittest(*classes): |
| 1128 | """Run tests from unittest.TestCase-derived classes.""" |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1129 | valid_types = (unittest.TestSuite, unittest.TestCase) |
Raymond Hettinger | 9dcbbea | 2003-04-27 07:54:23 +0000 | [diff] [blame] | 1130 | suite = unittest.TestSuite() |
Walter Dörwald | 21d3a32 | 2003-05-01 17:45:56 +0000 | [diff] [blame] | 1131 | for cls in classes: |
Guido van Rossum | 3172c5d | 2007-10-16 18:12:55 +0000 | [diff] [blame] | 1132 | if isinstance(cls, str): |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1133 | if cls in sys.modules: |
| 1134 | suite.addTest(unittest.findTestCases(sys.modules[cls])) |
| 1135 | else: |
| 1136 | raise ValueError("str arguments must be keys in sys.modules") |
| 1137 | elif isinstance(cls, valid_types): |
Raymond Hettinger | 21d9987 | 2003-07-16 02:59:32 +0000 | [diff] [blame] | 1138 | suite.addTest(cls) |
| 1139 | else: |
| 1140 | suite.addTest(unittest.makeSuite(cls)) |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1141 | _run_suite(suite) |
Raymond Hettinger | 9dcbbea | 2003-04-27 07:54:23 +0000 | [diff] [blame] | 1142 | |
Barry Warsaw | c10d690 | 2001-09-20 06:30:41 +0000 | [diff] [blame] | 1143 | |
Tim Peters | a0a6222 | 2001-09-09 06:12:01 +0000 | [diff] [blame] | 1144 | #======================================================================= |
| 1145 | # doctest driver. |
| 1146 | |
| 1147 | def run_doctest(module, verbosity=None): |
Tim Peters | 17111f3 | 2001-10-03 04:08:26 +0000 | [diff] [blame] | 1148 | """Run doctest on the given module. Return (#failures, #tests). |
Tim Peters | a0a6222 | 2001-09-09 06:12:01 +0000 | [diff] [blame] | 1149 | |
| 1150 | If optional argument verbosity is not specified (or is None), pass |
Benjamin Peterson | ee8712c | 2008-05-20 21:35:26 +0000 | [diff] [blame] | 1151 | support's belief about verbosity on to doctest. Else doctest's |
Tim Peters | bea3fb8 | 2001-09-10 01:39:21 +0000 | [diff] [blame] | 1152 | usual behavior is used (it searches sys.argv for -v). |
Tim Peters | a0a6222 | 2001-09-09 06:12:01 +0000 | [diff] [blame] | 1153 | """ |
| 1154 | |
| 1155 | import doctest |
| 1156 | |
| 1157 | if verbosity is None: |
| 1158 | verbosity = verbose |
| 1159 | else: |
| 1160 | verbosity = None |
| 1161 | |
Tim Peters | 342ca75 | 2001-09-25 19:13:20 +0000 | [diff] [blame] | 1162 | # Direct doctest output (normally just errors) to real stdout; doctest |
| 1163 | # output shouldn't be compared by regrtest. |
| 1164 | save_stdout = sys.stdout |
Tim Peters | 8dee809 | 2001-09-25 20:05:11 +0000 | [diff] [blame] | 1165 | sys.stdout = get_original_stdout() |
Tim Peters | 342ca75 | 2001-09-25 19:13:20 +0000 | [diff] [blame] | 1166 | try: |
| 1167 | f, t = doctest.testmod(module, verbose=verbosity) |
| 1168 | if f: |
| 1169 | raise TestFailed("%d of %d doctests failed" % (f, t)) |
| 1170 | finally: |
| 1171 | sys.stdout = save_stdout |
Raymond Hettinger | 35b34bd | 2003-05-17 00:58:33 +0000 | [diff] [blame] | 1172 | if verbose: |
Georg Brandl | db02844 | 2008-02-05 20:48:58 +0000 | [diff] [blame] | 1173 | print('doctest (%s) ... %d tests with zero failures' % |
| 1174 | (module.__name__, t)) |
Raymond Hettinger | 35b34bd | 2003-05-17 00:58:33 +0000 | [diff] [blame] | 1175 | return f, t |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1176 | |
Antoine Pitrou | 060cee2 | 2009-11-13 16:29:04 +0000 | [diff] [blame] | 1177 | |
| 1178 | #======================================================================= |
| 1179 | # Support for saving and restoring the imported modules. |
| 1180 | |
| 1181 | def modules_setup(): |
| 1182 | return sys.modules.copy(), |
| 1183 | |
| 1184 | def modules_cleanup(oldmodules): |
| 1185 | # Encoders/decoders are registered permanently within the internal |
| 1186 | # codec cache. If we destroy the corresponding modules their |
| 1187 | # globals will be set to None which will trip up the cached functions. |
| 1188 | encodings = [(k, v) for k, v in sys.modules.items() |
| 1189 | if k.startswith('encodings.')] |
| 1190 | sys.modules.clear() |
| 1191 | sys.modules.update(encodings) |
| 1192 | sys.modules.update(oldmodules) |
| 1193 | |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1194 | #======================================================================= |
| 1195 | # Threading support to prevent reporting refleaks when running regrtest.py -R |
| 1196 | |
Antoine Pitrou | 65c9c64 | 2009-10-30 17:25:12 +0000 | [diff] [blame] | 1197 | # NOTE: we use thread._count() rather than threading.enumerate() (or the |
| 1198 | # moral equivalent thereof) because a threading.Thread object is still alive |
| 1199 | # until its __bootstrap() method has returned, even after it has been |
| 1200 | # unregistered from the threading module. |
| 1201 | # thread._count(), on the other hand, only gets decremented *after* the |
| 1202 | # __bootstrap() method has returned, which gives us reliable reference counts |
| 1203 | # at the end of a test run. |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1204 | |
Antoine Pitrou | 65c9c64 | 2009-10-30 17:25:12 +0000 | [diff] [blame] | 1205 | def threading_setup(): |
Victor Stinner | 45df820 | 2010-04-28 22:31:17 +0000 | [diff] [blame] | 1206 | if _thread: |
| 1207 | return _thread._count(), |
| 1208 | else: |
| 1209 | return 1, |
Antoine Pitrou | 65c9c64 | 2009-10-30 17:25:12 +0000 | [diff] [blame] | 1210 | |
| 1211 | def threading_cleanup(nb_threads): |
Victor Stinner | 45df820 | 2010-04-28 22:31:17 +0000 | [diff] [blame] | 1212 | if not _thread: |
| 1213 | return |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1214 | _MAX_COUNT = 10 |
Antoine Pitrou | 65c9c64 | 2009-10-30 17:25:12 +0000 | [diff] [blame] | 1215 | for count in range(_MAX_COUNT): |
| 1216 | n = _thread._count() |
| 1217 | if n == nb_threads: |
| 1218 | break |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1219 | time.sleep(0.1) |
Antoine Pitrou | 65c9c64 | 2009-10-30 17:25:12 +0000 | [diff] [blame] | 1220 | # XXX print a warning in case of failure? |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1221 | |
Benjamin Peterson | fa0d703 | 2009-06-01 22:42:33 +0000 | [diff] [blame] | 1222 | def reap_threads(func): |
Victor Stinner | 45df820 | 2010-04-28 22:31:17 +0000 | [diff] [blame] | 1223 | """Use this function when threads are being used. This will |
| 1224 | ensure that the threads are cleaned up even when the test fails. |
| 1225 | If threading is unavailable this function does nothing. |
| 1226 | """ |
| 1227 | if not _thread: |
| 1228 | return func |
| 1229 | |
Benjamin Peterson | fa0d703 | 2009-06-01 22:42:33 +0000 | [diff] [blame] | 1230 | @functools.wraps(func) |
| 1231 | def decorator(*args): |
| 1232 | key = threading_setup() |
| 1233 | try: |
| 1234 | return func(*args) |
| 1235 | finally: |
| 1236 | threading_cleanup(*key) |
| 1237 | return decorator |
| 1238 | |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1239 | def reap_children(): |
| 1240 | """Use this function at the end of test_main() whenever sub-processes |
| 1241 | are started. This will help ensure that no extra children (zombies) |
| 1242 | stick around to hog resources and create problems when looking |
| 1243 | for refleaks. |
| 1244 | """ |
| 1245 | |
| 1246 | # Reap all our dead child processes so we don't leave zombies around. |
| 1247 | # These hog resources and might be causing some of the buildbots to die. |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1248 | if hasattr(os, 'waitpid'): |
| 1249 | any_process = -1 |
| 1250 | while True: |
| 1251 | try: |
| 1252 | # This will raise an exception on Windows. That's ok. |
| 1253 | pid, status = os.waitpid(any_process, os.WNOHANG) |
| 1254 | if pid == 0: |
| 1255 | break |
| 1256 | except: |
| 1257 | break |
Collin Winter | f2bf2b3 | 2010-03-17 00:41:56 +0000 | [diff] [blame] | 1258 | |
Brian Curtin | d40e6f7 | 2010-07-08 21:39:08 +0000 | [diff] [blame] | 1259 | try: |
| 1260 | from .symlink_support import enable_symlink_privilege |
| 1261 | except: |
| 1262 | enable_symlink_privilege = lambda: True |
| 1263 | |
| 1264 | def can_symlink(): |
| 1265 | """It's no longer sufficient to test for the presence of symlink in the |
| 1266 | os module - on Windows XP and earlier, os.symlink exists but a |
| 1267 | NotImplementedError is thrown. |
| 1268 | """ |
| 1269 | has_symlink = hasattr(os, 'symlink') |
| 1270 | is_old_windows = sys.platform == "win32" and sys.getwindowsversion().major < 6 |
| 1271 | has_privilege = False if is_old_windows else enable_symlink_privilege() |
| 1272 | return has_symlink and (not is_old_windows) and has_privilege |
| 1273 | |
| 1274 | def skip_unless_symlink(test): |
| 1275 | """Skip decorator for tests that require functional symlink""" |
| 1276 | selector = can_symlink() |
| 1277 | msg = "Requires functional symlink implementation" |
| 1278 | return [unittest.skip(msg)(test), test][selector] |
| 1279 | |
Collin Winter | f2bf2b3 | 2010-03-17 00:41:56 +0000 | [diff] [blame] | 1280 | @contextlib.contextmanager |
| 1281 | def swap_attr(obj, attr, new_val): |
| 1282 | """Temporary swap out an attribute with a new object. |
| 1283 | |
| 1284 | Usage: |
| 1285 | with swap_attr(obj, "attr", 5): |
| 1286 | ... |
| 1287 | |
| 1288 | This will set obj.attr to 5 for the duration of the with: block, |
| 1289 | restoring the old value at the end of the block. If `attr` doesn't |
| 1290 | exist on `obj`, it will be created and then deleted at the end of the |
| 1291 | block. |
| 1292 | """ |
| 1293 | if hasattr(obj, attr): |
| 1294 | real_val = getattr(obj, attr) |
| 1295 | setattr(obj, attr, new_val) |
| 1296 | try: |
| 1297 | yield |
| 1298 | finally: |
| 1299 | setattr(obj, attr, real_val) |
| 1300 | else: |
| 1301 | setattr(obj, attr, new_val) |
| 1302 | try: |
| 1303 | yield |
| 1304 | finally: |
| 1305 | delattr(obj, attr) |
| 1306 | |
| 1307 | @contextlib.contextmanager |
| 1308 | def swap_item(obj, item, new_val): |
| 1309 | """Temporary swap out an item with a new object. |
| 1310 | |
| 1311 | Usage: |
| 1312 | with swap_item(obj, "item", 5): |
| 1313 | ... |
| 1314 | |
| 1315 | This will set obj["item"] to 5 for the duration of the with: block, |
| 1316 | restoring the old value at the end of the block. If `item` doesn't |
| 1317 | exist on `obj`, it will be created and then deleted at the end of the |
| 1318 | block. |
| 1319 | """ |
| 1320 | if item in obj: |
| 1321 | real_val = obj[item] |
| 1322 | obj[item] = new_val |
| 1323 | try: |
| 1324 | yield |
| 1325 | finally: |
| 1326 | obj[item] = real_val |
| 1327 | else: |
| 1328 | obj[item] = new_val |
| 1329 | try: |
| 1330 | yield |
| 1331 | finally: |
| 1332 | del obj[item] |
Antoine Pitrou | 62f68ed | 2010-08-04 11:48:56 +0000 | [diff] [blame] | 1333 | |
| 1334 | def strip_python_stderr(stderr): |
| 1335 | """Strip the stderr of a Python process from potential debug output |
| 1336 | emitted by the interpreter. |
| 1337 | |
| 1338 | This will typically be run on the result of the communicate() method |
| 1339 | of a subprocess.Popen object. |
| 1340 | """ |
| 1341 | stderr = re.sub(br"\[\d+ refs\]\r?\n?$", b"", stderr).strip() |
| 1342 | return stderr |
Antoine Pitrou | 1b03f2c | 2010-10-14 11:12:00 +0000 | [diff] [blame] | 1343 | |
| 1344 | def args_from_interpreter_flags(): |
| 1345 | """Return a list of command-line arguments reproducing the current |
| 1346 | settings in sys.flags.""" |
| 1347 | flag_opt_map = { |
| 1348 | 'bytes_warning': 'b', |
| 1349 | 'dont_write_bytecode': 'B', |
| 1350 | 'ignore_environment': 'E', |
| 1351 | 'no_user_site': 's', |
| 1352 | 'no_site': 'S', |
| 1353 | 'optimize': 'O', |
| 1354 | 'verbose': 'v', |
| 1355 | } |
| 1356 | args = [] |
| 1357 | for flag, opt in flag_opt_map.items(): |
| 1358 | v = getattr(sys.flags, flag) |
| 1359 | if v > 0: |
| 1360 | args.append('-' + opt * v) |
| 1361 | return args |