3 # Copyright 2008, Google Inc.
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions are
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11 # notice, this list of conditions and the following disclaimer.
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17 # contributors may be used to endorse or promote products derived from
18 # this software without specific prior written permission.
20 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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30 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 r"""Tests the text output of Google C++ Testing and Mocking Framework.
34 To update the golden file:
35 googletest_output_test.py --build_dir=BUILD/DIR --gengolden
36 where BUILD/DIR contains the built googletest-output-test_ file.
37 googletest_output_test.py --gengolden
38 googletest_output_test.py
45 import gtest_test_utils
48 # The flag for generating the golden file
49 GENGOLDEN_FLAG = '--gengolden'
50 CATCH_EXCEPTIONS_ENV_VAR_NAME = 'GTEST_CATCH_EXCEPTIONS'
52 # The flag indicating stacktraces are not supported
53 NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
55 IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
56 IS_WINDOWS = os.name == 'nt'
58 GOLDEN_NAME = 'googletest-output-test-golden-lin.txt'
60 PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('googletest-output-test_')
62 # At least one command we exercise must not have the
63 # 'internal_skip_environment_and_ad_hoc_tests' argument.
64 COMMAND_LIST_TESTS = ({}, [PROGRAM_PATH, '--gtest_list_tests'])
65 COMMAND_WITH_COLOR = ({}, [PROGRAM_PATH, '--gtest_color=yes'])
66 COMMAND_WITH_TIME = ({}, [PROGRAM_PATH,
68 'internal_skip_environment_and_ad_hoc_tests',
69 '--gtest_filter=FatalFailureTest.*:LoggingTest.*'])
70 COMMAND_WITH_DISABLED = (
72 '--gtest_also_run_disabled_tests',
73 'internal_skip_environment_and_ad_hoc_tests',
74 '--gtest_filter=*DISABLED_*'])
75 COMMAND_WITH_SHARDING = (
76 {'GTEST_SHARD_INDEX': '1', 'GTEST_TOTAL_SHARDS': '2'},
78 'internal_skip_environment_and_ad_hoc_tests',
79 '--gtest_filter=PassingTest.*'])
81 GOLDEN_PATH = os.path.join(gtest_test_utils.GetSourceDir(), GOLDEN_NAME)
84 def ToUnixLineEnding(s):
85 """Changes all Windows/Mac line endings in s to UNIX line endings."""
87 return s.replace('\r\n', '\n').replace('\r', '\n')
90 def RemoveLocations(test_output):
91 """Removes all file location info from a Google Test program's output.
94 test_output: the output of a Google Test program.
97 output with all file location info (in the form of
98 'DIRECTORY/FILE_NAME:LINE_NUMBER: 'or
99 'DIRECTORY\\FILE_NAME(LINE_NUMBER): ') replaced by
103 return re.sub(r'.*[/\\]((googletest-output-test_|gtest).cc)(\:\d+|\(\d+\))\: ',
104 r'\1:#: ', test_output)
107 def RemoveStackTraceDetails(output):
108 """Removes all stack traces from a Google Test program's output."""
110 # *? means "find the shortest string that matches".
111 return re.sub(r'Stack trace:(.|\n)*?\n\n',
112 'Stack trace: (omitted)\n\n', output)
115 def RemoveStackTraces(output):
116 """Removes all traces of stack traces from a Google Test program's output."""
118 # *? means "find the shortest string that matches".
119 return re.sub(r'Stack trace:(.|\n)*?\n\n', '', output)
122 def RemoveTime(output):
123 """Removes all time information from a Google Test program's output."""
125 return re.sub(r'\(\d+ ms', '(? ms', output)
128 def RemoveTypeInfoDetails(test_output):
129 """Removes compiler-specific type info from Google Test program's output.
132 test_output: the output of a Google Test program.
135 output with type information normalized to canonical form.
138 # some compilers output the name of type 'unsigned int' as 'unsigned'
139 return re.sub(r'unsigned int', 'unsigned', test_output)
142 def NormalizeToCurrentPlatform(test_output):
143 """Normalizes platform specific output details for easier comparison."""
146 # Removes the color information that is not present on Windows.
147 test_output = re.sub('\x1b\\[(0;3\d)?m', '', test_output)
148 # Changes failure message headers into the Windows format.
149 test_output = re.sub(r': Failure\n', r': error: ', test_output)
150 # Changes file(line_number) to file:line_number.
151 test_output = re.sub(r'((\w|\.)+)\((\d+)\):', r'\1:\3:', test_output)
156 def RemoveTestCounts(output):
157 """Removes test counts from a Google Test program's output."""
159 output = re.sub(r'\d+ tests?, listed below',
160 '? tests, listed below', output)
161 output = re.sub(r'\d+ FAILED TESTS',
162 '? FAILED TESTS', output)
163 output = re.sub(r'\d+ tests? from \d+ test cases?',
164 '? tests from ? test cases', output)
165 output = re.sub(r'\d+ tests? from ([a-zA-Z_])',
166 r'? tests from \1', output)
167 return re.sub(r'\d+ tests?\.', '? tests.', output)
170 def RemoveMatchingTests(test_output, pattern):
171 """Removes output of specified tests from a Google Test program's output.
173 This function strips not only the beginning and the end of a test but also
174 all output in between.
177 test_output: A string containing the test output.
178 pattern: A regex string that matches names of test cases or
182 Contents of test_output with tests whose names match pattern removed.
185 test_output = re.sub(
186 r'.*\[ RUN \] .*%s(.|\n)*?\[( FAILED | OK )\] .*%s.*\n' % (
190 return re.sub(r'.*%s.*\n' % pattern, '', test_output)
193 def NormalizeOutput(output):
194 """Normalizes output (the output of googletest-output-test_.exe)."""
196 output = ToUnixLineEnding(output)
197 output = RemoveLocations(output)
198 output = RemoveStackTraceDetails(output)
199 output = RemoveTime(output)
203 def GetShellCommandOutput(env_cmd):
204 """Runs a command in a sub-process, and returns its output in a string.
207 env_cmd: The shell command. A 2-tuple where element 0 is a dict of extra
208 environment variables to set, and element 1 is a string with
209 the command and any flags.
212 A string with the command's combined standard and diagnostic output.
215 # Spawns cmd in a sub-process, and gets its standard I/O file objects.
216 # Set and save the environment properly.
217 environ = os.environ.copy()
218 environ.update(env_cmd[0])
219 p = gtest_test_utils.Subprocess(env_cmd[1], env=environ)
224 def GetCommandOutput(env_cmd):
225 """Runs a command and returns its output with all file location
229 env_cmd: The shell command. A 2-tuple where element 0 is a dict of extra
230 environment variables to set, and element 1 is a string with
231 the command and any flags.
234 # Disables exception pop-ups on Windows.
235 environ, cmdline = env_cmd
236 environ = dict(environ) # Ensures we are modifying a copy.
237 environ[CATCH_EXCEPTIONS_ENV_VAR_NAME] = '1'
238 return NormalizeOutput(GetShellCommandOutput((environ, cmdline)))
241 def GetOutputOfAllCommands():
242 """Returns concatenated output from several representative commands."""
244 return (GetCommandOutput(COMMAND_WITH_COLOR) +
245 GetCommandOutput(COMMAND_WITH_TIME) +
246 GetCommandOutput(COMMAND_WITH_DISABLED) +
247 GetCommandOutput(COMMAND_WITH_SHARDING))
250 test_list = GetShellCommandOutput(COMMAND_LIST_TESTS)
251 SUPPORTS_DEATH_TESTS = 'DeathTest' in test_list
252 SUPPORTS_TYPED_TESTS = 'TypedTest' in test_list
253 SUPPORTS_THREADS = 'ExpectFailureWithThreadsTest' in test_list
254 SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
256 CAN_GENERATE_GOLDEN_FILE = (SUPPORTS_DEATH_TESTS and
257 SUPPORTS_TYPED_TESTS and
259 SUPPORTS_STACK_TRACES)
261 class GTestOutputTest(gtest_test_utils.TestCase):
262 def RemoveUnsupportedTests(self, test_output):
263 if not SUPPORTS_DEATH_TESTS:
264 test_output = RemoveMatchingTests(test_output, 'DeathTest')
265 if not SUPPORTS_TYPED_TESTS:
266 test_output = RemoveMatchingTests(test_output, 'TypedTest')
267 test_output = RemoveMatchingTests(test_output, 'TypedDeathTest')
268 test_output = RemoveMatchingTests(test_output, 'TypeParamDeathTest')
269 if not SUPPORTS_THREADS:
270 test_output = RemoveMatchingTests(test_output,
271 'ExpectFailureWithThreadsTest')
272 test_output = RemoveMatchingTests(test_output,
273 'ScopedFakeTestPartResultReporterTest')
274 test_output = RemoveMatchingTests(test_output,
276 if not SUPPORTS_STACK_TRACES:
277 test_output = RemoveStackTraces(test_output)
281 def testOutput(self):
282 output = GetOutputOfAllCommands()
284 golden_file = open(GOLDEN_PATH, 'rb')
285 # A mis-configured source control system can cause \r appear in EOL
286 # sequences when we read the golden file irrespective of an operating
287 # system used. Therefore, we need to strip those \r's from newlines
289 golden = ToUnixLineEnding(golden_file.read().decode())
292 # We want the test to pass regardless of certain features being
295 # We still have to remove type name specifics in all cases.
296 normalized_actual = RemoveTypeInfoDetails(output)
297 normalized_golden = RemoveTypeInfoDetails(golden)
299 if CAN_GENERATE_GOLDEN_FILE:
300 self.assertEqual(normalized_golden, normalized_actual,
301 '\n'.join(difflib.unified_diff(
302 normalized_golden.split('\n'),
303 normalized_actual.split('\n'),
304 'golden', 'actual')))
306 normalized_actual = NormalizeToCurrentPlatform(
307 RemoveTestCounts(normalized_actual))
308 normalized_golden = NormalizeToCurrentPlatform(
309 RemoveTestCounts(self.RemoveUnsupportedTests(normalized_golden)))
311 # This code is very handy when debugging golden file differences:
312 if os.getenv('DEBUG_GTEST_OUTPUT_TEST'):
314 gtest_test_utils.GetSourceDir(),
315 '_googletest-output-test_normalized_actual.txt'), 'wb').write(
318 gtest_test_utils.GetSourceDir(),
319 '_googletest-output-test_normalized_golden.txt'), 'wb').write(
322 self.assertEqual(normalized_golden, normalized_actual)
325 if __name__ == '__main__':
326 if NO_STACKTRACE_SUPPORT_FLAG in sys.argv:
327 # unittest.main() can't handle unknown flags
328 sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
330 if GENGOLDEN_FLAG in sys.argv:
331 if CAN_GENERATE_GOLDEN_FILE:
332 output = GetOutputOfAllCommands()
333 golden_file = open(GOLDEN_PATH, 'wb')
334 golden_file.write(output.encode())
338 """Unable to write a golden file when compiled in an environment
339 that does not support all the required features (death tests,
340 typed tests, stack traces, and multiple threads).
341 Please build this test and generate the golden file using Blaze on Linux.""")
343 sys.stderr.write(message)
346 gtest_test_utils.Main()