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      1 #!/usr/bin/env python
      2 #
      3 # Copyright 2008, Google Inc.
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      9 #
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     11 # notice, this list of conditions and the following disclaimer.
     12 #     * Redistributions in binary form must reproduce the above
     13 # copyright notice, this list of conditions and the following disclaimer
     14 # in the documentation and/or other materials provided with the
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     17 # contributors may be used to endorse or promote products derived from
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     19 #
     20 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     21 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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     30 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31 
     32 """Tests the text output of Google C++ Testing Framework.
     33 
     34 SYNOPSIS
     35        gtest_output_test.py --build_dir=BUILD/DIR --gengolden
     36          # where BUILD/DIR contains the built gtest_output_test_ file.
     37        gtest_output_test.py --gengolden
     38        gtest_output_test.py
     39 """
     40 
     41 __author__ = 'wan (at] google.com (Zhanyong Wan)'
     42 
     43 import os
     44 import re
     45 import sys
     46 import gtest_test_utils
     47 
     48 
     49 # The flag for generating the golden file
     50 GENGOLDEN_FLAG = '--gengolden'
     51 CATCH_EXCEPTIONS_ENV_VAR_NAME = 'GTEST_CATCH_EXCEPTIONS'
     52 
     53 IS_WINDOWS = os.name == 'nt'
     54 
     55 # TODO(vladl (at] google.com): remove the _lin suffix.
     56 GOLDEN_NAME = 'gtest_output_test_golden_lin.txt'
     57 
     58 PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('gtest_output_test_')
     59 
     60 # At least one command we exercise must not have the
     61 # --gtest_internal_skip_environment_and_ad_hoc_tests flag.
     62 COMMAND_LIST_TESTS = ({}, [PROGRAM_PATH, '--gtest_list_tests'])
     63 COMMAND_WITH_COLOR = ({}, [PROGRAM_PATH, '--gtest_color=yes'])
     64 COMMAND_WITH_TIME = ({}, [PROGRAM_PATH,
     65                           '--gtest_print_time',
     66                           '--gtest_internal_skip_environment_and_ad_hoc_tests',
     67                           '--gtest_filter=FatalFailureTest.*:LoggingTest.*'])
     68 COMMAND_WITH_DISABLED = (
     69     {}, [PROGRAM_PATH,
     70          '--gtest_also_run_disabled_tests',
     71          '--gtest_internal_skip_environment_and_ad_hoc_tests',
     72          '--gtest_filter=*DISABLED_*'])
     73 COMMAND_WITH_SHARDING = (
     74     {'GTEST_SHARD_INDEX': '1', 'GTEST_TOTAL_SHARDS': '2'},
     75     [PROGRAM_PATH,
     76      '--gtest_internal_skip_environment_and_ad_hoc_tests',
     77      '--gtest_filter=PassingTest.*'])
     78 
     79 GOLDEN_PATH = os.path.join(gtest_test_utils.GetSourceDir(), GOLDEN_NAME)
     80 
     81 
     82 def ToUnixLineEnding(s):
     83   """Changes all Windows/Mac line endings in s to UNIX line endings."""
     84 
     85   return s.replace('\r\n', '\n').replace('\r', '\n')
     86 
     87 
     88 def RemoveLocations(test_output):
     89   """Removes all file location info from a Google Test program's output.
     90 
     91   Args:
     92        test_output:  the output of a Google Test program.
     93 
     94   Returns:
     95        output with all file location info (in the form of
     96        'DIRECTORY/FILE_NAME:LINE_NUMBER: 'or
     97        'DIRECTORY\\FILE_NAME(LINE_NUMBER): ') replaced by
     98        'FILE_NAME:#: '.
     99   """
    100 
    101   return re.sub(r'.*[/\\](.+)(\:\d+|\(\d+\))\: ', r'\1:#: ', test_output)
    102 
    103 
    104 def RemoveStackTraceDetails(output):
    105   """Removes all stack traces from a Google Test program's output."""
    106 
    107   # *? means "find the shortest string that matches".
    108   return re.sub(r'Stack trace:(.|\n)*?\n\n',
    109                 'Stack trace: (omitted)\n\n', output)
    110 
    111 
    112 def RemoveStackTraces(output):
    113   """Removes all traces of stack traces from a Google Test program's output."""
    114 
    115   # *? means "find the shortest string that matches".
    116   return re.sub(r'Stack trace:(.|\n)*?\n\n', '', output)
    117 
    118 
    119 def RemoveTime(output):
    120   """Removes all time information from a Google Test program's output."""
    121 
    122   return re.sub(r'\(\d+ ms', '(? ms', output)
    123 
    124 
    125 def RemoveTypeInfoDetails(test_output):
    126   """Removes compiler-specific type info from Google Test program's output.
    127 
    128   Args:
    129        test_output:  the output of a Google Test program.
    130 
    131   Returns:
    132        output with type information normalized to canonical form.
    133   """
    134 
    135   # some compilers output the name of type 'unsigned int' as 'unsigned'
    136   return re.sub(r'unsigned int', 'unsigned', test_output)
    137 
    138 
    139 def NormalizeToCurrentPlatform(test_output):
    140   """Normalizes platform specific output details for easier comparison."""
    141 
    142   if IS_WINDOWS:
    143     # Removes the color information that is not present on Windows.
    144     test_output = re.sub('\x1b\\[(0;3\d)?m', '', test_output)
    145     # Changes failure message headers into the Windows format.
    146     test_output = re.sub(r': Failure\n', r': error: ', test_output)
    147     # Changes file(line_number) to file:line_number.
    148     test_output = re.sub(r'((\w|\.)+)\((\d+)\):', r'\1:\3:', test_output)
    149 
    150   return test_output
    151 
    152 
    153 def RemoveTestCounts(output):
    154   """Removes test counts from a Google Test program's output."""
    155 
    156   output = re.sub(r'\d+ tests?, listed below',
    157                   '? tests, listed below', output)
    158   output = re.sub(r'\d+ FAILED TESTS',
    159                   '? FAILED TESTS', output)
    160   output = re.sub(r'\d+ tests? from \d+ test cases?',
    161                   '? tests from ? test cases', output)
    162   output = re.sub(r'\d+ tests? from ([a-zA-Z_])',
    163                   r'? tests from \1', output)
    164   return re.sub(r'\d+ tests?\.', '? tests.', output)
    165 
    166 
    167 def RemoveMatchingTests(test_output, pattern):
    168   """Removes output of specified tests from a Google Test program's output.
    169 
    170   This function strips not only the beginning and the end of a test but also
    171   all output in between.
    172 
    173   Args:
    174     test_output:       A string containing the test output.
    175     pattern:           A regex string that matches names of test cases or
    176                        tests to remove.
    177 
    178   Returns:
    179     Contents of test_output with tests whose names match pattern removed.
    180   """
    181 
    182   test_output = re.sub(
    183       r'.*\[ RUN      \] .*%s(.|\n)*?\[(  FAILED  |       OK )\] .*%s.*\n' % (
    184           pattern, pattern),
    185       '',
    186       test_output)
    187   return re.sub(r'.*%s.*\n' % pattern, '', test_output)
    188 
    189 
    190 def NormalizeOutput(output):
    191   """Normalizes output (the output of gtest_output_test_.exe)."""
    192 
    193   output = ToUnixLineEnding(output)
    194   output = RemoveLocations(output)
    195   output = RemoveStackTraceDetails(output)
    196   output = RemoveTime(output)
    197   return output
    198 
    199 
    200 def GetShellCommandOutput(env_cmd):
    201   """Runs a command in a sub-process, and returns its output in a string.
    202 
    203   Args:
    204     env_cmd: The shell command. A 2-tuple where element 0 is a dict of extra
    205              environment variables to set, and element 1 is a string with
    206              the command and any flags.
    207 
    208   Returns:
    209     A string with the command's combined standard and diagnostic output.
    210   """
    211 
    212   # Spawns cmd in a sub-process, and gets its standard I/O file objects.
    213   # Set and save the environment properly.
    214   environ = os.environ.copy()
    215   environ.update(env_cmd[0])
    216   p = gtest_test_utils.Subprocess(env_cmd[1], env=environ)
    217 
    218   return p.output
    219 
    220 
    221 def GetCommandOutput(env_cmd):
    222   """Runs a command and returns its output with all file location
    223   info stripped off.
    224 
    225   Args:
    226     env_cmd:  The shell command. A 2-tuple where element 0 is a dict of extra
    227               environment variables to set, and element 1 is a string with
    228               the command and any flags.
    229   """
    230 
    231   # Disables exception pop-ups on Windows.
    232   environ, cmdline = env_cmd
    233   environ = dict(environ)  # Ensures we are modifying a copy.
    234   environ[CATCH_EXCEPTIONS_ENV_VAR_NAME] = '1'
    235   return NormalizeOutput(GetShellCommandOutput((environ, cmdline)))
    236 
    237 
    238 def GetOutputOfAllCommands():
    239   """Returns concatenated output from several representative commands."""
    240 
    241   return (GetCommandOutput(COMMAND_WITH_COLOR) +
    242           GetCommandOutput(COMMAND_WITH_TIME) +
    243           GetCommandOutput(COMMAND_WITH_DISABLED) +
    244           GetCommandOutput(COMMAND_WITH_SHARDING))
    245 
    246 
    247 test_list = GetShellCommandOutput(COMMAND_LIST_TESTS)
    248 SUPPORTS_DEATH_TESTS = 'DeathTest' in test_list
    249 SUPPORTS_TYPED_TESTS = 'TypedTest' in test_list
    250 SUPPORTS_THREADS = 'ExpectFailureWithThreadsTest' in test_list
    251 SUPPORTS_STACK_TRACES = False
    252 
    253 CAN_GENERATE_GOLDEN_FILE = (SUPPORTS_DEATH_TESTS and
    254                             SUPPORTS_TYPED_TESTS and
    255                             SUPPORTS_THREADS and
    256                             not IS_WINDOWS)
    257 
    258 class GTestOutputTest(gtest_test_utils.TestCase):
    259   def RemoveUnsupportedTests(self, test_output):
    260     if not SUPPORTS_DEATH_TESTS:
    261       test_output = RemoveMatchingTests(test_output, 'DeathTest')
    262     if not SUPPORTS_TYPED_TESTS:
    263       test_output = RemoveMatchingTests(test_output, 'TypedTest')
    264       test_output = RemoveMatchingTests(test_output, 'TypedDeathTest')
    265       test_output = RemoveMatchingTests(test_output, 'TypeParamDeathTest')
    266     if not SUPPORTS_THREADS:
    267       test_output = RemoveMatchingTests(test_output,
    268                                         'ExpectFailureWithThreadsTest')
    269       test_output = RemoveMatchingTests(test_output,
    270                                         'ScopedFakeTestPartResultReporterTest')
    271       test_output = RemoveMatchingTests(test_output,
    272                                         'WorksConcurrently')
    273     if not SUPPORTS_STACK_TRACES:
    274       test_output = RemoveStackTraces(test_output)
    275 
    276     return test_output
    277 
    278   def testOutput(self):
    279     output = GetOutputOfAllCommands()
    280 
    281     golden_file = open(GOLDEN_PATH, 'rb')
    282     # A mis-configured source control system can cause \r appear in EOL
    283     # sequences when we read the golden file irrespective of an operating
    284     # system used. Therefore, we need to strip those \r's from newlines
    285     # unconditionally.
    286     golden = ToUnixLineEnding(golden_file.read())
    287     golden_file.close()
    288 
    289     # We want the test to pass regardless of certain features being
    290     # supported or not.
    291 
    292     # We still have to remove type name specifics in all cases.
    293     normalized_actual = RemoveTypeInfoDetails(output)
    294     normalized_golden = RemoveTypeInfoDetails(golden)
    295 
    296     if CAN_GENERATE_GOLDEN_FILE:
    297       self.assertEqual(normalized_golden, normalized_actual)
    298     else:
    299       normalized_actual = NormalizeToCurrentPlatform(
    300           RemoveTestCounts(normalized_actual))
    301       normalized_golden = NormalizeToCurrentPlatform(
    302           RemoveTestCounts(self.RemoveUnsupportedTests(normalized_golden)))
    303 
    304       # This code is very handy when debugging golden file differences:
    305       if os.getenv('DEBUG_GTEST_OUTPUT_TEST'):
    306         open(os.path.join(
    307             gtest_test_utils.GetSourceDir(),
    308             '_gtest_output_test_normalized_actual.txt'), 'wb').write(
    309                 normalized_actual)
    310         open(os.path.join(
    311             gtest_test_utils.GetSourceDir(),
    312             '_gtest_output_test_normalized_golden.txt'), 'wb').write(
    313                 normalized_golden)
    314 
    315       self.assertEqual(normalized_golden, normalized_actual)
    316 
    317 
    318 if __name__ == '__main__':
    319   if sys.argv[1:] == [GENGOLDEN_FLAG]:
    320     if CAN_GENERATE_GOLDEN_FILE:
    321       output = GetOutputOfAllCommands()
    322       golden_file = open(GOLDEN_PATH, 'wb')
    323       golden_file.write(output)
    324       golden_file.close()
    325     else:
    326       message = (
    327           """Unable to write a golden file when compiled in an environment
    328 that does not support all the required features (death tests, typed tests,
    329 and multiple threads).  Please generate the golden file using a binary built
    330 with those features enabled.""")
    331 
    332       sys.stderr.write(message)
    333       sys.exit(1)
    334   else:
    335     gtest_test_utils.Main()
    336