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test_result.py
import sys import textwrap from StringIO import StringIO from test import test_support import traceback import unittest class Test_TestResult(unittest.TestCase): # Note: there are not separate tests for TestResult.wasSuccessful(), # TestResult.errors, TestResult.failures, TestResult.testsRun or # TestResult.shouldStop because these only have meaning in terms of # other TestResult methods. # # Accordingly, tests for the aforenamed attributes are incorporated # in with the tests for the defining methods. ################################################################ def test_init(self): result = unittest.TestResult() self.assertTrue(result.wasSuccessful()) self.assertEqual(len(result.errors), 0) self.assertEqual(len(result.failures), 0) self.assertEqual(result.testsRun, 0) self.assertEqual(result.shouldStop, False) self.assertIsNone(result._stdout_buffer) self.assertIsNone(result._stderr_buffer) # "This method can be called to signal that the set of tests being # run should be aborted by setting the TestResult's shouldStop # attribute to True." def test_stop(self): result = unittest.TestResult() result.stop() self.assertEqual(result.shouldStop, True) # "Called when the test case test is about to be run. The default # implementation simply increments the instance's testsRun counter." def test_startTest(self): class Foo(unittest.TestCase): def test_1(self): pass test = Foo('test_1') result = unittest.TestResult() result.startTest(test) self.assertTrue(result.wasSuccessful()) self.assertEqual(len(result.errors), 0) self.assertEqual(len(result.failures), 0) self.assertEqual(result.testsRun, 1) self.assertEqual(result.shouldStop, False) result.stopTest(test) # "Called after the test case test has been executed, regardless of # the outcome. The default implementation does nothing." def test_stopTest(self): class Foo(unittest.TestCase): def test_1(self): pass test = Foo('test_1') result = unittest.TestResult() result.startTest(test) self.assertTrue(result.wasSuccessful()) self.assertEqual(len(result.errors), 0) self.assertEqual(len(result.failures), 0) self.assertEqual(result.testsRun, 1) self.assertEqual(result.shouldStop, False) result.stopTest(test) # Same tests as above; make sure nothing has changed self.assertTrue(result.wasSuccessful()) self.assertEqual(len(result.errors), 0) self.assertEqual(len(result.failures), 0) self.assertEqual(result.testsRun, 1) self.assertEqual(result.shouldStop, False) # "Called before and after tests are run. The default implementation does nothing." def test_startTestRun_stopTestRun(self): result = unittest.TestResult() result.startTestRun() result.stopTestRun() # "addSuccess(test)" # ... # "Called when the test case test succeeds" # ... # "wasSuccessful() - Returns True if all tests run so far have passed, # otherwise returns False" # ... # "testsRun - The total number of tests run so far." # ... # "errors - A list containing 2-tuples of TestCase instances and # formatted tracebacks. Each tuple represents a test which raised an # unexpected exception. Contains formatted # tracebacks instead of sys.exc_info() results." # ... # "failures - A list containing 2-tuples of TestCase instances and # formatted tracebacks. Each tuple represents a test where a failure was # explicitly signalled using the TestCase.fail*() or TestCase.assert*() # methods. Contains formatted tracebacks instead # of sys.exc_info() results." def test_addSuccess(self): class Foo(unittest.TestCase): def test_1(self): pass test = Foo('test_1') result = unittest.TestResult() result.startTest(test) result.addSuccess(test) result.stopTest(test) self.assertTrue(result.wasSuccessful()) self.assertEqual(len(result.errors), 0) self.assertEqual(len(result.failures), 0) self.assertEqual(result.testsRun, 1) self.assertEqual(result.shouldStop, False) # "addFailure(test, err)" # ... # "Called when the test case test signals a failure. err is a tuple of # the form returned by sys.exc_info(): (type, value, traceback)" # ... # "wasSuccessful() - Returns True if all tests run so far have passed, # otherwise returns False" # ... # "testsRun - The total number of tests run so far." # ... # "errors - A list containing 2-tuples of TestCase instances and # formatted tracebacks. Each tuple represents a test which raised an # unexpected exception. Contains formatted # tracebacks instead of sys.exc_info() results." # ... # "failures - A list containing 2-tuples of TestCase instances and # formatted tracebacks. Each tuple represents a test where a failure was # explicitly signalled using the TestCase.fail*() or TestCase.assert*() # methods. Contains formatted tracebacks instead # of sys.exc_info() results." def test_addFailure(self): class Foo(unittest.TestCase): def test_1(self): pass test = Foo('test_1') try: test.fail("foo") except: exc_info_tuple = sys.exc_info() result = unittest.TestResult() result.startTest(test) result.addFailure(test, exc_info_tuple) result.stopTest(test) self.assertFalse(result.wasSuccessful()) self.assertEqual(len(result.errors), 0) self.assertEqual(len(result.failures), 1) self.assertEqual(result.testsRun, 1) self.assertEqual(result.shouldStop, False) test_case, formatted_exc = result.failures[0] self.assertIs(test_case, test) self.assertIsInstance(formatted_exc, str) # "addError(test, err)" # ... # "Called when the test case test raises an unexpected exception err # is a tuple of the form returned by sys.exc_info(): # (type, value, traceback)" # ... # "wasSuccessful() - Returns True if all tests run so far have passed, # otherwise returns False" # ... # "testsRun - The total number of tests run so far." # ... # "errors - A list containing 2-tuples of TestCase instances and # formatted tracebacks. Each tuple represents a test which raised an # unexpected exception. Contains formatted # tracebacks instead of sys.exc_info() results." # ... # "failures - A list containing 2-tuples of TestCase instances and # formatted tracebacks. Each tuple represents a test where a failure was # explicitly signalled using the TestCase.fail*() or TestCase.assert*() # methods. Contains formatted tracebacks instead # of sys.exc_info() results." def test_addError(self): class Foo(unittest.TestCase): def test_1(self): pass test = Foo('test_1') try: raise TypeError() except: exc_info_tuple = sys.exc_info() result = unittest.TestResult() result.startTest(test) result.addError(test, exc_info_tuple) result.stopTest(test) self.assertFalse(result.wasSuccessful()) self.assertEqual(len(result.errors), 1) self.assertEqual(len(result.failures), 0) self.assertEqual(result.testsRun, 1) self.assertEqual(result.shouldStop, False) test_case, formatted_exc = result.errors[0] self.assertIs(test_case, test) self.assertIsInstance(formatted_exc, str) def testGetDescriptionWithoutDocstring(self): result = unittest.TextTestResult(None, True, 1) self.assertEqual( result.getDescription(self), 'testGetDescriptionWithoutDocstring (' + __name__ + '.Test_TestResult)') @unittest.skipIf(sys.flags.optimize >= 2, "Docstrings are omitted with -O2 and above") def testGetDescriptionWithOneLineDocstring(self): """Tests getDescription() for a method with a docstring.""" result = unittest.TextTestResult(None, True, 1) self.assertEqual( result.getDescription(self), ('testGetDescriptionWithOneLineDocstring ' '(' + __name__ + '.Test_TestResult)\n' 'Tests getDescription() for a method with a docstring.')) @unittest.skipIf(sys.flags.optimize >= 2, "Docstrings are omitted with -O2 and above") def testGetDescriptionWithMultiLineDocstring(self): """Tests getDescription() for a method with a longer docstring. The second line of the docstring. """ result = unittest.TextTestResult(None, True, 1) self.assertEqual( result.getDescription(self), ('testGetDescriptionWithMultiLineDocstring ' '(' + __name__ + '.Test_TestResult)\n' 'Tests getDescription() for a method with a longer ' 'docstring.')) def testStackFrameTrimming(self): class Frame(object): class tb_frame(object): f_globals = {} result = unittest.TestResult() self.assertFalse(result._is_relevant_tb_level(Frame)) Frame.tb_frame.f_globals['__unittest'] = True self.assertTrue(result._is_relevant_tb_level(Frame)) def testFailFast(self): result = unittest.TestResult() result._exc_info_to_string = lambda *_: '' result.failfast = True result.addError(None, None) self.assertTrue(result.shouldStop) result = unittest.TestResult() result._exc_info_to_string = lambda *_: '' result.failfast = True result.addFailure(None, None) self.assertTrue(result.shouldStop) result = unittest.TestResult() result._exc_info_to_string = lambda *_: '' result.failfast = True result.addUnexpectedSuccess(None) self.assertTrue(result.shouldStop) def testFailFastSetByRunner(self): runner = unittest.TextTestRunner(stream=StringIO(), failfast=True) def test(result): self.assertTrue(result.failfast) runner.run(test) classDict = dict(unittest.TestResult.__dict__) for m in ('addSkip', 'addExpectedFailure', 'addUnexpectedSuccess', '__init__'): del classDict[m] def __init__(self, stream=None, descriptions=None, verbosity=None): self.failures = [] self.errors = [] self.testsRun = 0 self.shouldStop = False self.buffer = False classDict['__init__'] = __init__ OldResult = type('OldResult', (object,), classDict) class Test_OldTestResult(unittest.TestCase): def assertOldResultWarning(self, test, failures): with test_support.check_warnings(("TestResult has no add.+ method,", RuntimeWarning)): result = OldResult() test.run(result) self.assertEqual(len(result.failures), failures) def testOldTestResult(self): class Test(unittest.TestCase): def testSkip(self): self.skipTest('foobar') @unittest.expectedFailure def testExpectedFail(self): raise TypeError @unittest.expectedFailure def testUnexpectedSuccess(self): pass for test_name, should_pass in (('testSkip', True), ('testExpectedFail', True), ('testUnexpectedSuccess', False)): test = Test(test_name) self.assertOldResultWarning(test, int(not should_pass)) def testOldTestTesultSetup(self): class Test(unittest.TestCase): def setUp(self): self.skipTest('no reason') def testFoo(self): pass self.assertOldResultWarning(Test('testFoo'), 0) def testOldTestResultClass(self): @unittest.skip('no reason') class Test(unittest.TestCase): def testFoo(self): pass self.assertOldResultWarning(Test('testFoo'), 0) def testOldResultWithRunner(self): class Test(unittest.TestCase): def testFoo(self): pass runner = unittest.TextTestRunner(resultclass=OldResult, stream=StringIO()) # This will raise an exception if TextTestRunner can't handle old # test result objects runner.run(Test('testFoo')) class MockTraceback(object): @staticmethod def format_exception(*_): return ['A traceback'] def restore_traceback(): unittest.result.traceback = traceback class TestOutputBuffering(unittest.TestCase): def setUp(self): self._real_out = sys.stdout self._real_err = sys.stderr def tearDown(self): sys.stdout = self._real_out sys.stderr = self._real_err def testBufferOutputOff(self): real_out = self._real_out real_err = self._real_err result = unittest.TestResult() self.assertFalse(result.buffer) self.assertIs(real_out, sys.stdout) self.assertIs(real_err, sys.stderr) result.startTest(self) self.assertIs(real_out, sys.stdout) self.assertIs(real_err, sys.stderr) def testBufferOutputStartTestAddSuccess(self): real_out = self._real_out real_err = self._real_err result = unittest.TestResult() self.assertFalse(result.buffer) result.buffer = True self.assertIs(real_out, sys.stdout) self.assertIs(real_err, sys.stderr) result.startTest(self) self.assertIsNot(real_out, sys.stdout) self.assertIsNot(real_err, sys.stderr) self.assertIsInstance(sys.stdout, StringIO) self.assertIsInstance(sys.stderr, StringIO) self.assertIsNot(sys.stdout, sys.stderr) out_stream = sys.stdout err_stream = sys.stderr result._original_stdout = StringIO() result._original_stderr = StringIO() print 'foo' print >> sys.stderr, 'bar' self.assertEqual(out_stream.getvalue(), 'foo\n') self.assertEqual(err_stream.getvalue(), 'bar\n') self.assertEqual(result._original_stdout.getvalue(), '') self.assertEqual(result._original_stderr.getvalue(), '') result.addSuccess(self) result.stopTest(self) self.assertIs(sys.stdout, result._original_stdout) self.assertIs(sys.stderr, result._original_stderr) self.assertEqual(result._original_stdout.getvalue(), '') self.assertEqual(result._original_stderr.getvalue(), '') self.assertEqual(out_stream.getvalue(), '') self.assertEqual(err_stream.getvalue(), '') def getStartedResult(self): result = unittest.TestResult() result.buffer = True result.startTest(self) return result def testBufferOutputAddErrorOrFailure(self): unittest.result.traceback = MockTraceback self.addCleanup(restore_traceback) for message_attr, add_attr, include_error in [ ('errors', 'addError', True), ('failures', 'addFailure', False), ('errors', 'addError', True), ('failures', 'addFailure', False) ]: result = self.getStartedResult() buffered_out = sys.stdout buffered_err = sys.stderr result._original_stdout = StringIO() result._original_stderr = StringIO() print >> sys.stdout, 'foo' if include_error: print >> sys.stderr, 'bar' addFunction = getattr(result, add_attr) addFunction(self, (None, None, None)) result.stopTest(self) result_list = getattr(result, message_attr) self.assertEqual(len(result_list), 1) test, message = result_list[0] expectedOutMessage = textwrap.dedent(""" Stdout: foo """) expectedErrMessage = '' if include_error: expectedErrMessage = textwrap.dedent(""" Stderr: bar """) expectedFullMessage = 'A traceback%s%s' % (expectedOutMessage, expectedErrMessage) self.assertIs(test, self) self.assertEqual(result._original_stdout.getvalue(), expectedOutMessage) self.assertEqual(result._original_stderr.getvalue(), expectedErrMessage) self.assertMultiLineEqual(message, expectedFullMessage) def testBufferSetupClass(self): result = unittest.TestResult() result.buffer = True class Foo(unittest.TestCase): @classmethod def setUpClass(cls): 1//0 def test_foo(self): pass suite = unittest.TestSuite([Foo('test_foo')]) suite(result) self.assertEqual(len(result.errors), 1) def testBufferTearDownClass(self): result = unittest.TestResult() result.buffer = True class Foo(unittest.TestCase): @classmethod def tearDownClass(cls): 1//0 def test_foo(self): pass suite = unittest.TestSuite([Foo('test_foo')]) suite(result) self.assertEqual(len(result.errors), 1) def testBufferSetUpModule(self): result = unittest.TestResult() result.buffer = True class Foo(unittest.TestCase): def test_foo(self): pass class Module(object): @staticmethod def setUpModule(): 1//0 Foo.__module__ = 'Module' sys.modules['Module'] = Module self.addCleanup(sys.modules.pop, 'Module') suite = unittest.TestSuite([Foo('test_foo')]) suite(result) self.assertEqual(len(result.errors), 1) def testBufferTearDownModule(self): result = unittest.TestResult() result.buffer = True class Foo(unittest.TestCase): def test_foo(self): pass class Module(object): @staticmethod def tearDownModule(): 1//0 Foo.__module__ = 'Module' sys.modules['Module'] = Module self.addCleanup(sys.modules.pop, 'Module') suite = unittest.TestSuite([Foo('test_foo')]) suite(result) self.assertEqual(len(result.errors), 1) if __name__ == '__main__': unittest.main()
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