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      1 #!/usr/bin/env python
      2 #
      3 # Copyright 2008, Google Inc.
      4 # All rights reserved.
      5 #
      6 # Redistribution and use in source and binary forms, with or without
      7 # modification, are permitted provided that the following conditions are
      8 # met:
      9 #
     10 #     * Redistributions of source code must retain the above copyright
     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
     15 # distribution.
     16 #     * Neither the name of Google Inc. nor the names of its
     17 # contributors may be used to endorse or promote products derived from
     18 # this software without specific prior written permission.
     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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     23 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     24 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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     30 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31 
     32 """Verifies that Google Test correctly parses environment variables."""
     33 
     34 __author__ = 'wan (at] google.com (Zhanyong Wan)'
     35 
     36 import os
     37 import gtest_test_utils
     38 
     39 
     40 IS_WINDOWS = os.name == 'nt'
     41 IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
     42 
     43 COMMAND = gtest_test_utils.GetTestExecutablePath('gtest_env_var_test_')
     44 
     45 environ = os.environ.copy()
     46 
     47 
     48 def AssertEq(expected, actual):
     49   if expected != actual:
     50     print 'Expected: %s' % (expected,)
     51     print '  Actual: %s' % (actual,)
     52     raise AssertionError
     53 
     54 
     55 def SetEnvVar(env_var, value):
     56   """Sets the env variable to 'value'; unsets it when 'value' is None."""
     57 
     58   if value is not None:
     59     environ[env_var] = value
     60   elif env_var in environ:
     61     del environ[env_var]
     62 
     63 
     64 def GetFlag(flag):
     65   """Runs gtest_env_var_test_ and returns its output."""
     66 
     67   args = [COMMAND]
     68   if flag is not None:
     69     args += [flag]
     70   return gtest_test_utils.Subprocess(args, env=environ).output
     71 
     72 
     73 def TestFlag(flag, test_val, default_val):
     74   """Verifies that the given flag is affected by the corresponding env var."""
     75 
     76   env_var = 'GTEST_' + flag.upper()
     77   SetEnvVar(env_var, test_val)
     78   AssertEq(test_val, GetFlag(flag))
     79   SetEnvVar(env_var, None)
     80   AssertEq(default_val, GetFlag(flag))
     81 
     82 
     83 class GTestEnvVarTest(gtest_test_utils.TestCase):
     84   def testEnvVarAffectsFlag(self):
     85     """Tests that environment variable should affect the corresponding flag."""
     86 
     87     TestFlag('break_on_failure', '1', '0')
     88     TestFlag('color', 'yes', 'auto')
     89     TestFlag('filter', 'FooTest.Bar', '*')
     90     TestFlag('output', 'xml:tmp/foo.xml', '')
     91     TestFlag('print_time', '0', '1')
     92     TestFlag('repeat', '999', '1')
     93     TestFlag('throw_on_failure', '1', '0')
     94     TestFlag('death_test_style', 'threadsafe', 'fast')
     95     TestFlag('catch_exceptions', '0', '1')
     96 
     97     if IS_LINUX:
     98       TestFlag('death_test_use_fork', '1', '0')
     99       TestFlag('stack_trace_depth', '0', '100')
    100 
    101 
    102 if __name__ == '__main__':
    103   gtest_test_utils.Main()
    104