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32 """Tests the --help flag of Google C++ Testing and Mocking Framework.
35 gtest_help_test.py --build_dir=BUILD/DIR
36 # where BUILD/DIR contains the built gtest_help_test_ file.
42 import gtest_test_utils
45 IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
46 IS_GNUHURD = os.name == 'posix' and os.uname()[0] == 'GNU'
47 IS_GNUKFREEBSD = os.name == 'posix' and os.uname()[0] == 'GNU/kFreeBSD'
48 IS_WINDOWS = os.name == 'nt'
50 PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('gtest_help_test_')
51 FLAG_PREFIX = '--gtest_'
52 DEATH_TEST_STYLE_FLAG = FLAG_PREFIX + 'death_test_style'
53 STREAM_RESULT_TO_FLAG = FLAG_PREFIX + 'stream_result_to'
54 UNKNOWN_FLAG = FLAG_PREFIX + 'unknown_flag_for_testing'
55 LIST_TESTS_FLAG = FLAG_PREFIX + 'list_tests'
56 INCORRECT_FLAG_VARIANTS = [re.sub('^--', '-', LIST_TESTS_FLAG),
57 re.sub('^--', '/', LIST_TESTS_FLAG),
58 re.sub('_', '-', LIST_TESTS_FLAG)]
59 INTERNAL_FLAG_FOR_TESTING = FLAG_PREFIX + 'internal_flag_for_testing'
61 SUPPORTS_DEATH_TESTS = "DeathTest" in gtest_test_utils.Subprocess(
62 [PROGRAM_PATH, LIST_TESTS_FLAG]).output
64 # The help message must match this regex.
65 HELP_REGEX = re.compile(
66 FLAG_PREFIX + r'list_tests.*' +
67 FLAG_PREFIX + r'filter=.*' +
68 FLAG_PREFIX + r'also_run_disabled_tests.*' +
69 FLAG_PREFIX + r'repeat=.*' +
70 FLAG_PREFIX + r'shuffle.*' +
71 FLAG_PREFIX + r'random_seed=.*' +
72 FLAG_PREFIX + r'color=.*' +
73 FLAG_PREFIX + r'brief.*' +
74 FLAG_PREFIX + r'print_time.*' +
75 FLAG_PREFIX + r'output=.*' +
76 FLAG_PREFIX + r'break_on_failure.*' +
77 FLAG_PREFIX + r'throw_on_failure.*' +
78 FLAG_PREFIX + r'catch_exceptions=0.*',
82 def RunWithFlag(flag):
83 """Runs gtest_help_test_ with the given flag.
86 the exit code and the text output as a tuple.
88 flag: the command-line flag to pass to gtest_help_test_, or None.
92 command = [PROGRAM_PATH]
94 command = [PROGRAM_PATH, flag]
95 child = gtest_test_utils.Subprocess(command)
96 return child.exit_code, child.output
99 class GTestHelpTest(gtest_test_utils.TestCase):
100 """Tests the --help flag and its equivalent forms."""
102 def TestHelpFlag(self, flag):
103 """Verifies correct behavior when help flag is specified.
105 The right message must be printed and the tests must
106 skipped when the given flag is specified.
109 flag: A flag to pass to the binary or None.
112 exit_code, output = RunWithFlag(flag)
113 self.assertEquals(0, exit_code)
114 self.assert_(HELP_REGEX.search(output), output)
116 if IS_LINUX or IS_GNUHURD or IS_GNUKFREEBSD:
117 self.assert_(STREAM_RESULT_TO_FLAG in output, output)
119 self.assert_(STREAM_RESULT_TO_FLAG not in output, output)
121 if SUPPORTS_DEATH_TESTS and not IS_WINDOWS:
122 self.assert_(DEATH_TEST_STYLE_FLAG in output, output)
124 self.assert_(DEATH_TEST_STYLE_FLAG not in output, output)
126 def TestNonHelpFlag(self, flag):
127 """Verifies correct behavior when no help flag is specified.
129 Verifies that when no help flag is specified, the tests are run
130 and the help message is not printed.
133 flag: A flag to pass to the binary or None.
136 exit_code, output = RunWithFlag(flag)
137 self.assert_(exit_code != 0)
138 self.assert_(not HELP_REGEX.search(output), output)
140 def testPrintsHelpWithFullFlag(self):
141 self.TestHelpFlag('--help')
143 def testPrintsHelpWithShortFlag(self):
144 self.TestHelpFlag('-h')
146 def testPrintsHelpWithQuestionFlag(self):
147 self.TestHelpFlag('-?')
149 def testPrintsHelpWithWindowsStyleQuestionFlag(self):
150 self.TestHelpFlag('/?')
152 def testPrintsHelpWithUnrecognizedGoogleTestFlag(self):
153 self.TestHelpFlag(UNKNOWN_FLAG)
155 def testPrintsHelpWithIncorrectFlagStyle(self):
156 for incorrect_flag in INCORRECT_FLAG_VARIANTS:
157 self.TestHelpFlag(incorrect_flag)
159 def testRunsTestsWithoutHelpFlag(self):
160 """Verifies that when no help flag is specified, the tests are run
161 and the help message is not printed."""
163 self.TestNonHelpFlag(None)
165 def testRunsTestsWithGtestInternalFlag(self):
166 """Verifies that the tests are run and no help message is printed when
167 a flag starting with Google Test prefix and 'internal_' is supplied."""
169 self.TestNonHelpFlag(INTERNAL_FLAG_FOR_TESTING)
172 if __name__ == '__main__':
173 gtest_test_utils.Main()