ceph/src/rapidjson/thirdparty/gtest/googletest/test/gtest_throw_on_failure_test.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2009, Google Inc.
   4 # All rights reserved.
   5 #
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  11 # notice, this list of conditions and the following disclaimer.
  12 #     * Redistributions in binary form must reproduce the above
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  15 # distribution.
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  17 # contributors may be used to endorse or promote products derived from
  18 # this software without specific prior written permission.
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  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 Google Test's throw-on-failure mode with exceptions disabled.
  33
  34 This script invokes gtest_throw_on_failure_test_ (a program written with
  35 Google Test) with different environments and command line flags.
  36 """
  37
  38 __author__ = 'wan@google.com (Zhanyong Wan)'
  39
  40 import os
  41 import gtest_test_utils
  42
  43
  44 # Constants.
  45
  46 # The command line flag for enabling/disabling the throw-on-failure mode.
  47 THROW_ON_FAILURE = 'gtest_throw_on_failure'
  48
  49 # Path to the gtest_throw_on_failure_test_ program, compiled with
  50 # exceptions disabled.
  51 EXE_PATH = gtest_test_utils.GetTestExecutablePath(
  52     'gtest_throw_on_failure_test_')
  53
  54
  55 # Utilities.
  56
  57
  58 def SetEnvVar(env_var, value):
  59   """Sets an environment variable to a given value; unsets it when the
  60   given value is None.
  61   """
  62
  63   env_var = env_var.upper()
  64   if value is not None:
  65     os.environ[env_var] = value
  66   elif env_var in os.environ:
  67     del os.environ[env_var]
  68
  69
  70 def Run(command):
  71   """Runs a command; returns True/False if its exit code is/isn't 0."""
  72
  73   print('Running "%s". . .' % ' '.join(command))
  74   p = gtest_test_utils.Subprocess(command)
  75   return p.exited and p.exit_code == 0
  76
  77
  78 # The tests.  TODO(wan@google.com): refactor the class to share common
  79 # logic with code in gtest_break_on_failure_unittest.py.
  80 class ThrowOnFailureTest(gtest_test_utils.TestCase):
  81   """Tests the throw-on-failure mode."""
  82
  83   def RunAndVerify(self, env_var_value, flag_value, should_fail):
  84     """Runs gtest_throw_on_failure_test_ and verifies that it does
  85     (or does not) exit with a non-zero code.
  86
  87     Args:
  88       env_var_value:    value of the GTEST_BREAK_ON_FAILURE environment
  89                         variable; None if the variable should be unset.
  90       flag_value:       value of the --gtest_break_on_failure flag;
  91                         None if the flag should not be present.
  92       should_fail:      True iff the program is expected to fail.
  93     """
  94
  95     SetEnvVar(THROW_ON_FAILURE, env_var_value)
  96
  97     if env_var_value is None:
  98       env_var_value_msg = ' is not set'
  99     else:
 100       env_var_value_msg = '=' + env_var_value
 101
 102     if flag_value is None:
 103       flag = ''
 104     elif flag_value == '0':
 105       flag = '--%s=0' % THROW_ON_FAILURE
 106     else:
 107       flag = '--%s' % THROW_ON_FAILURE
 108
 109     command = [EXE_PATH]
 110     if flag:
 111       command.append(flag)
 112
 113     if should_fail:
 114       should_or_not = 'should'
 115     else:
 116       should_or_not = 'should not'
 117
 118     failed = not Run(command)
 119
 120     SetEnvVar(THROW_ON_FAILURE, None)
 121
 122     msg = ('when %s%s, an assertion failure in "%s" %s cause a non-zero '
 123            'exit code.' %
 124            (THROW_ON_FAILURE, env_var_value_msg, ' '.join(command),
 125             should_or_not))
 126     self.assert_(failed == should_fail, msg)
 127
 128   def testDefaultBehavior(self):
 129     """Tests the behavior of the default mode."""
 130
 131     self.RunAndVerify(env_var_value=None, flag_value=None, should_fail=False)
 132
 133   def testThrowOnFailureEnvVar(self):
 134     """Tests using the GTEST_THROW_ON_FAILURE environment variable."""
 135
 136     self.RunAndVerify(env_var_value='0',
 137                       flag_value=None,
 138                       should_fail=False)
 139     self.RunAndVerify(env_var_value='1',
 140                       flag_value=None,
 141                       should_fail=True)
 142
 143   def testThrowOnFailureFlag(self):
 144     """Tests using the --gtest_throw_on_failure flag."""
 145
 146     self.RunAndVerify(env_var_value=None,
 147                       flag_value='0',
 148                       should_fail=False)
 149     self.RunAndVerify(env_var_value=None,
 150                       flag_value='1',
 151                       should_fail=True)
 152
 153   def testThrowOnFailureFlagOverridesEnvVar(self):
 154     """Tests that --gtest_throw_on_failure overrides GTEST_THROW_ON_FAILURE."""
 155
 156     self.RunAndVerify(env_var_value='0',
 157                       flag_value='0',
 158                       should_fail=False)
 159     self.RunAndVerify(env_var_value='0',
 160                       flag_value='1',
 161                       should_fail=True)
 162     self.RunAndVerify(env_var_value='1',
 163                       flag_value='0',
 164                       should_fail=False)
 165     self.RunAndVerify(env_var_value='1',
 166                       flag_value='1',
 167                       should_fail=True)
 168
 169
 170 if __name__ == '__main__':
 171   gtest_test_utils.Main()