cpython/Lib/unittest/test/test_program.py

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import io
import os
import sys
import unittest
class Test_TestProgram(unittest.TestCase):
def test_discovery_from_dotted_path(self):
loader = unittest.TestLoader()
tests = [self]
expectedPath = os.path.abspath(os.path.dirname(unittest.test.__file__))
self.wasRun = False
def _find_tests(start_dir, pattern):
self.wasRun = True
self.assertEqual(start_dir, expectedPath)
return tests
loader._find_tests = _find_tests
suite = loader.discover('unittest.test')
self.assertTrue(self.wasRun)
self.assertEqual(suite._tests, tests)
# Horrible white box test
def testNoExit(self):
result = object()
test = object()
class FakeRunner(object):
def run(self, test):
self.test = test
return result
runner = FakeRunner()
oldParseArgs = unittest.TestProgram.parseArgs
def restoreParseArgs():
unittest.TestProgram.parseArgs = oldParseArgs
unittest.TestProgram.parseArgs = lambda *args: None
self.addCleanup(restoreParseArgs)
def removeTest():
del unittest.TestProgram.test
unittest.TestProgram.test = test
self.addCleanup(removeTest)
program = unittest.TestProgram(testRunner=runner, exit=False, verbosity=2)
self.assertEqual(program.result, result)
self.assertEqual(runner.test, test)
self.assertEqual(program.verbosity, 2)
class FooBar(unittest.TestCase):
def testPass(self):
assert True
def testFail(self):
assert False
class FooBarLoader(unittest.TestLoader):
"""Test loader that returns a suite containing FooBar."""
def loadTestsFromModule(self, module):
return self.suiteClass(
[self.loadTestsFromTestCase(Test_TestProgram.FooBar)])
def test_NonExit(self):
program = unittest.main(exit=False,
argv=["foobar"],
testRunner=unittest.TextTestRunner(stream=io.StringIO()),
testLoader=self.FooBarLoader())
self.assertTrue(hasattr(program, 'result'))
def test_Exit(self):
self.assertRaises(
SystemExit,
unittest.main,
argv=["foobar"],
testRunner=unittest.TextTestRunner(stream=io.StringIO()),
exit=True,
testLoader=self.FooBarLoader())
def test_ExitAsDefault(self):
self.assertRaises(
SystemExit,
unittest.main,
argv=["foobar"],
testRunner=unittest.TextTestRunner(stream=io.StringIO()),
testLoader=self.FooBarLoader())
class InitialisableProgram(unittest.TestProgram):
exit = False
result = None
verbosity = 1
defaultTest = None
testRunner = None
testLoader = unittest.defaultTestLoader
module = '__main__'
progName = 'test'
test = 'test'
def __init__(self, *args):
pass
RESULT = object()
class FakeRunner(object):
initArgs = None
test = None
raiseError = False
def __init__(self, **kwargs):
FakeRunner.initArgs = kwargs
if FakeRunner.raiseError:
FakeRunner.raiseError = False
raise TypeError
def run(self, test):
FakeRunner.test = test
return RESULT
class TestCommandLineArgs(unittest.TestCase):
def setUp(self):
self.program = InitialisableProgram()
self.program.createTests = lambda: None
FakeRunner.initArgs = None
FakeRunner.test = None
FakeRunner.raiseError = False
def testHelpAndUnknown(self):
program = self.program
def usageExit(msg=None):
program.msg = msg
program.exit = True
program.usageExit = usageExit
for opt in '-h', '-H', '--help':
program.exit = False
program.parseArgs([None, opt])
self.assertTrue(program.exit)
self.assertIsNone(program.msg)
program.parseArgs([None, '-$'])
self.assertTrue(program.exit)
self.assertIsNotNone(program.msg)
def testVerbosity(self):
program = self.program
for opt in '-q', '--quiet':
program.verbosity = 1
program.parseArgs([None, opt])
self.assertEqual(program.verbosity, 0)
for opt in '-v', '--verbose':
program.verbosity = 1
program.parseArgs([None, opt])
self.assertEqual(program.verbosity, 2)
def testBufferCatchFailfast(self):
program = self.program
for arg, attr in (('buffer', 'buffer'), ('failfast', 'failfast'),
('catch', 'catchbreak')):
if attr == 'catch' and not hasInstallHandler:
continue
short_opt = '-%s' % arg[0]
long_opt = '--%s' % arg
for opt in short_opt, long_opt:
setattr(program, attr, None)
program.parseArgs([None, opt])
self.assertTrue(getattr(program, attr))
for opt in short_opt, long_opt:
not_none = object()
setattr(program, attr, not_none)
program.parseArgs([None, opt])
self.assertEqual(getattr(program, attr), not_none)
def testWarning(self):
"""Test the warnings argument"""
# see #10535
class FakeTP(unittest.TestProgram):
def parseArgs(self, *args, **kw): pass
def runTests(self, *args, **kw): pass
warnoptions = sys.warnoptions[:]
try:
sys.warnoptions[:] = []
# no warn options, no arg -> default
self.assertEqual(FakeTP().warnings, 'default')
# no warn options, w/ arg -> arg value
self.assertEqual(FakeTP(warnings='ignore').warnings, 'ignore')
sys.warnoptions[:] = ['somevalue']
# warn options, no arg -> None
# warn options, w/ arg -> arg value
self.assertEqual(FakeTP().warnings, None)
self.assertEqual(FakeTP(warnings='ignore').warnings, 'ignore')
finally:
sys.warnoptions[:] = warnoptions
def testRunTestsRunnerClass(self):
program = self.program
program.testRunner = FakeRunner
program.verbosity = 'verbosity'
program.failfast = 'failfast'
program.buffer = 'buffer'
program.warnings = 'warnings'
program.runTests()
self.assertEqual(FakeRunner.initArgs, {'verbosity': 'verbosity',
'failfast': 'failfast',
'buffer': 'buffer',
'warnings': 'warnings'})
self.assertEqual(FakeRunner.test, 'test')
self.assertIs(program.result, RESULT)
def testRunTestsRunnerInstance(self):
program = self.program
program.testRunner = FakeRunner()
FakeRunner.initArgs = None
program.runTests()
# A new FakeRunner should not have been instantiated
self.assertIsNone(FakeRunner.initArgs)
self.assertEqual(FakeRunner.test, 'test')
self.assertIs(program.result, RESULT)
def testRunTestsOldRunnerClass(self):
program = self.program
FakeRunner.raiseError = True
program.testRunner = FakeRunner
program.verbosity = 'verbosity'
program.failfast = 'failfast'
program.buffer = 'buffer'
program.test = 'test'
program.runTests()
# If initialising raises a type error it should be retried
# without the new keyword arguments
self.assertEqual(FakeRunner.initArgs, {})
self.assertEqual(FakeRunner.test, 'test')
self.assertIs(program.result, RESULT)
def testCatchBreakInstallsHandler(self):
module = sys.modules['unittest.main']
original = module.installHandler
def restore():
module.installHandler = original
self.addCleanup(restore)
self.installed = False
def fakeInstallHandler():
self.installed = True
module.installHandler = fakeInstallHandler
program = self.program
program.catchbreak = True
program.testRunner = FakeRunner
program.runTests()
self.assertTrue(self.installed)
def _patch_isfile(self, names, exists=True):
def isfile(path):
return path in names
original = os.path.isfile
os.path.isfile = isfile
def restore():
os.path.isfile = original
self.addCleanup(restore)
def testParseArgsFileNames(self):
# running tests with filenames instead of module names
program = self.program
argv = ['progname', 'foo.py', 'bar.Py', 'baz.PY', 'wing.txt']
self._patch_isfile(argv)
program.createTests = lambda: None
program.parseArgs(argv)
# note that 'wing.txt' is not a Python file so the name should
# *not* be converted to a module name
expected = ['foo', 'bar', 'baz', 'wing.txt']
self.assertEqual(program.testNames, expected)
def testParseArgsFilePaths(self):
program = self.program
argv = ['progname', 'foo/bar/baz.py', 'green\\red.py']
self._patch_isfile(argv)
program.createTests = lambda: None
program.parseArgs(argv)
expected = ['foo.bar.baz', 'green.red']
self.assertEqual(program.testNames, expected)
def testParseArgsNonExistentFiles(self):
program = self.program
argv = ['progname', 'foo/bar/baz.py', 'green\\red.py']
self._patch_isfile([])
program.createTests = lambda: None
program.parseArgs(argv)
self.assertEqual(program.testNames, argv[1:])
def testParseArgsAbsolutePathsThatCanBeConverted(self):
cur_dir = os.getcwd()
program = self.program
def _join(name):
return os.path.join(cur_dir, name)
argv = ['progname', _join('foo/bar/baz.py'), _join('green\\red.py')]
self._patch_isfile(argv)
program.createTests = lambda: None
program.parseArgs(argv)
expected = ['foo.bar.baz', 'green.red']
self.assertEqual(program.testNames, expected)
def testParseArgsAbsolutePathsThatCannotBeConverted(self):
program = self.program
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# even on Windows '/...' is considered absolute by os.path.abspath
argv = ['progname', '/foo/bar/baz.py', '/green/red.py']
self._patch_isfile(argv)
program.createTests = lambda: None
program.parseArgs(argv)
self.assertEqual(program.testNames, argv[1:])
# it may be better to use platform specific functions to normalise paths
# rather than accepting '.PY' and '\' as file seprator on Linux / Mac
# it would also be better to check that a filename is a valid module
# identifier (we have a regex for this in loader.py)
# for invalid filenames should we raise a useful error rather than
# leaving the current error message (import of filename fails) in place?
if __name__ == '__main__':
unittest.main()