main.py 11 KB

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  1. """Unittest main program"""
  2. import sys
  3. import argparse
  4. import os
  5. import warnings
  6. from . import loader, runner
  7. from .signals import installHandler
  8. __unittest = True
  9. MAIN_EXAMPLES = """\
  10. Examples:
  11. %(prog)s test_module - run tests from test_module
  12. %(prog)s module.TestClass - run tests from module.TestClass
  13. %(prog)s module.Class.test_method - run specified test method
  14. %(prog)s path/to/test_file.py - run tests from test_file.py
  15. """
  16. MODULE_EXAMPLES = """\
  17. Examples:
  18. %(prog)s - run default set of tests
  19. %(prog)s MyTestSuite - run suite 'MyTestSuite'
  20. %(prog)s MyTestCase.testSomething - run MyTestCase.testSomething
  21. %(prog)s MyTestCase - run all 'test*' test methods
  22. in MyTestCase
  23. """
  24. def _convert_name(name):
  25. # on Linux / Mac OS X 'foo.PY' is not importable, but on
  26. # Windows it is. Simpler to do a case insensitive match
  27. # a better check would be to check that the name is a
  28. # valid Python module name.
  29. if os.path.isfile(name) and name.lower().endswith('.py'):
  30. if os.path.isabs(name):
  31. rel_path = os.path.relpath(name, os.getcwd())
  32. if os.path.isabs(rel_path) or rel_path.startswith(os.pardir):
  33. return name
  34. name = rel_path
  35. # on Windows both '\' and '/' are used as path
  36. # separators. Better to replace both than rely on os.path.sep
  37. return os.path.normpath(name)[:-3].replace('\\', '.').replace('/', '.')
  38. return name
  39. def _convert_names(names):
  40. return [_convert_name(name) for name in names]
  41. def _convert_select_pattern(pattern):
  42. if not '*' in pattern:
  43. pattern = '*%s*' % pattern
  44. return pattern
  45. class TestProgram(object):
  46. """A command-line program that runs a set of tests; this is primarily
  47. for making test modules conveniently executable.
  48. """
  49. # defaults for testing
  50. module=None
  51. verbosity = 1
  52. failfast = catchbreak = buffer = progName = warnings = testNamePatterns = None
  53. _discovery_parser = None
  54. def __init__(self, module='__main__', defaultTest=None, argv=None,
  55. testRunner=None, testLoader=loader.defaultTestLoader,
  56. exit=True, verbosity=1, failfast=None, catchbreak=None,
  57. buffer=None, warnings=None, *, tb_locals=False):
  58. if isinstance(module, str):
  59. self.module = __import__(module)
  60. for part in module.split('.')[1:]:
  61. self.module = getattr(self.module, part)
  62. else:
  63. self.module = module
  64. if argv is None:
  65. argv = sys.argv
  66. self.exit = exit
  67. self.failfast = failfast
  68. self.catchbreak = catchbreak
  69. self.verbosity = verbosity
  70. self.buffer = buffer
  71. self.tb_locals = tb_locals
  72. if warnings is None and not sys.warnoptions:
  73. # even if DeprecationWarnings are ignored by default
  74. # print them anyway unless other warnings settings are
  75. # specified by the warnings arg or the -W python flag
  76. self.warnings = 'default'
  77. else:
  78. # here self.warnings is set either to the value passed
  79. # to the warnings args or to None.
  80. # If the user didn't pass a value self.warnings will
  81. # be None. This means that the behavior is unchanged
  82. # and depends on the values passed to -W.
  83. self.warnings = warnings
  84. self.defaultTest = defaultTest
  85. self.testRunner = testRunner
  86. self.testLoader = testLoader
  87. self.progName = os.path.basename(argv[0])
  88. self.parseArgs(argv)
  89. self.runTests()
  90. def usageExit(self, msg=None):
  91. warnings.warn("TestProgram.usageExit() is deprecated and will be"
  92. " removed in Python 3.13", DeprecationWarning)
  93. if msg:
  94. print(msg)
  95. if self._discovery_parser is None:
  96. self._initArgParsers()
  97. self._print_help()
  98. sys.exit(2)
  99. def _print_help(self, *args, **kwargs):
  100. if self.module is None:
  101. print(self._main_parser.format_help())
  102. print(MAIN_EXAMPLES % {'prog': self.progName})
  103. self._discovery_parser.print_help()
  104. else:
  105. print(self._main_parser.format_help())
  106. print(MODULE_EXAMPLES % {'prog': self.progName})
  107. def parseArgs(self, argv):
  108. self._initArgParsers()
  109. if self.module is None:
  110. if len(argv) > 1 and argv[1].lower() == 'discover':
  111. self._do_discovery(argv[2:])
  112. return
  113. self._main_parser.parse_args(argv[1:], self)
  114. if not self.tests:
  115. # this allows "python -m unittest -v" to still work for
  116. # test discovery.
  117. self._do_discovery([])
  118. return
  119. else:
  120. self._main_parser.parse_args(argv[1:], self)
  121. if self.tests:
  122. self.testNames = _convert_names(self.tests)
  123. if __name__ == '__main__':
  124. # to support python -m unittest ...
  125. self.module = None
  126. elif self.defaultTest is None:
  127. # createTests will load tests from self.module
  128. self.testNames = None
  129. elif isinstance(self.defaultTest, str):
  130. self.testNames = (self.defaultTest,)
  131. else:
  132. self.testNames = list(self.defaultTest)
  133. self.createTests()
  134. def createTests(self, from_discovery=False, Loader=None):
  135. if self.testNamePatterns:
  136. self.testLoader.testNamePatterns = self.testNamePatterns
  137. if from_discovery:
  138. loader = self.testLoader if Loader is None else Loader()
  139. self.test = loader.discover(self.start, self.pattern, self.top)
  140. elif self.testNames is None:
  141. self.test = self.testLoader.loadTestsFromModule(self.module)
  142. else:
  143. self.test = self.testLoader.loadTestsFromNames(self.testNames,
  144. self.module)
  145. def _initArgParsers(self):
  146. parent_parser = self._getParentArgParser()
  147. self._main_parser = self._getMainArgParser(parent_parser)
  148. self._discovery_parser = self._getDiscoveryArgParser(parent_parser)
  149. def _getParentArgParser(self):
  150. parser = argparse.ArgumentParser(add_help=False)
  151. parser.add_argument('-v', '--verbose', dest='verbosity',
  152. action='store_const', const=2,
  153. help='Verbose output')
  154. parser.add_argument('-q', '--quiet', dest='verbosity',
  155. action='store_const', const=0,
  156. help='Quiet output')
  157. parser.add_argument('--locals', dest='tb_locals',
  158. action='store_true',
  159. help='Show local variables in tracebacks')
  160. if self.failfast is None:
  161. parser.add_argument('-f', '--failfast', dest='failfast',
  162. action='store_true',
  163. help='Stop on first fail or error')
  164. self.failfast = False
  165. if self.catchbreak is None:
  166. parser.add_argument('-c', '--catch', dest='catchbreak',
  167. action='store_true',
  168. help='Catch Ctrl-C and display results so far')
  169. self.catchbreak = False
  170. if self.buffer is None:
  171. parser.add_argument('-b', '--buffer', dest='buffer',
  172. action='store_true',
  173. help='Buffer stdout and stderr during tests')
  174. self.buffer = False
  175. if self.testNamePatterns is None:
  176. parser.add_argument('-k', dest='testNamePatterns',
  177. action='append', type=_convert_select_pattern,
  178. help='Only run tests which match the given substring')
  179. self.testNamePatterns = []
  180. return parser
  181. def _getMainArgParser(self, parent):
  182. parser = argparse.ArgumentParser(parents=[parent])
  183. parser.prog = self.progName
  184. parser.print_help = self._print_help
  185. parser.add_argument('tests', nargs='*',
  186. help='a list of any number of test modules, '
  187. 'classes and test methods.')
  188. return parser
  189. def _getDiscoveryArgParser(self, parent):
  190. parser = argparse.ArgumentParser(parents=[parent])
  191. parser.prog = '%s discover' % self.progName
  192. parser.epilog = ('For test discovery all test modules must be '
  193. 'importable from the top level directory of the '
  194. 'project.')
  195. parser.add_argument('-s', '--start-directory', dest='start',
  196. help="Directory to start discovery ('.' default)")
  197. parser.add_argument('-p', '--pattern', dest='pattern',
  198. help="Pattern to match tests ('test*.py' default)")
  199. parser.add_argument('-t', '--top-level-directory', dest='top',
  200. help='Top level directory of project (defaults to '
  201. 'start directory)')
  202. for arg in ('start', 'pattern', 'top'):
  203. parser.add_argument(arg, nargs='?',
  204. default=argparse.SUPPRESS,
  205. help=argparse.SUPPRESS)
  206. return parser
  207. def _do_discovery(self, argv, Loader=None):
  208. self.start = '.'
  209. self.pattern = 'test*.py'
  210. self.top = None
  211. if argv is not None:
  212. # handle command line args for test discovery
  213. if self._discovery_parser is None:
  214. # for testing
  215. self._initArgParsers()
  216. self._discovery_parser.parse_args(argv, self)
  217. self.createTests(from_discovery=True, Loader=Loader)
  218. def runTests(self):
  219. if self.catchbreak:
  220. installHandler()
  221. if self.testRunner is None:
  222. self.testRunner = runner.TextTestRunner
  223. if isinstance(self.testRunner, type):
  224. try:
  225. try:
  226. testRunner = self.testRunner(verbosity=self.verbosity,
  227. failfast=self.failfast,
  228. buffer=self.buffer,
  229. warnings=self.warnings,
  230. tb_locals=self.tb_locals)
  231. except TypeError:
  232. # didn't accept the tb_locals argument
  233. testRunner = self.testRunner(verbosity=self.verbosity,
  234. failfast=self.failfast,
  235. buffer=self.buffer,
  236. warnings=self.warnings)
  237. except TypeError:
  238. # didn't accept the verbosity, buffer or failfast arguments
  239. testRunner = self.testRunner()
  240. else:
  241. # it is assumed to be a TestRunner instance
  242. testRunner = self.testRunner
  243. self.result = testRunner.run(self.test)
  244. if self.exit:
  245. sys.exit(not self.result.wasSuccessful())
  246. main = TestProgram