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32 """Tests Google Test's throw-on-failure mode with exceptions disabled.
34 This script invokes gtest_throw_on_failure_test_ (a program written with
35 Google Test) with different environments and command line flags.
38 __author__ = 'wan@google.com (Zhanyong Wan)'
41 import gtest_test_utils
46 # The command line flag for enabling/disabling the throw-on-failure mode.
47 THROW_ON_FAILURE = 'gtest_throw_on_failure'
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_')
58 def SetEnvVar(env_var, value):
59 """Sets an environment variable to a given value; unsets it when the
63 env_var = env_var.upper()
65 os.environ[env_var] = value
66 elif env_var in os.environ:
67 del os.environ[env_var]
71 """Runs a command; returns True/False if its exit code is/isn't 0."""
73 print 'Running "%s". . .' % ' '.join(command)
74 p = gtest_test_utils.Subprocess(command)
75 return p.exited and p.exit_code == 0
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."""
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.
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.
95 SetEnvVar(THROW_ON_FAILURE, env_var_value)
97 if env_var_value is None:
98 env_var_value_msg = ' is not set'
100 env_var_value_msg = '=' + env_var_value
102 if flag_value is None:
104 elif flag_value == '0':
105 flag = '--%s=0' % THROW_ON_FAILURE
107 flag = '--%s' % THROW_ON_FAILURE
114 should_or_not = 'should'
116 should_or_not = 'should not'
118 failed = not Run(command)
120 SetEnvVar(THROW_ON_FAILURE, None)
122 msg = ('when %s%s, an assertion failure in "%s" %s cause a non-zero '
124 (THROW_ON_FAILURE, env_var_value_msg, ' '.join(command),
126 self.assert_(failed == should_fail, msg)
128 def testDefaultBehavior(self):
129 """Tests the behavior of the default mode."""
131 self.RunAndVerify(env_var_value=None, flag_value=None, should_fail=False)
133 def testThrowOnFailureEnvVar(self):
134 """Tests using the GTEST_THROW_ON_FAILURE environment variable."""
136 self.RunAndVerify(env_var_value='0',
139 self.RunAndVerify(env_var_value='1',
143 def testThrowOnFailureFlag(self):
144 """Tests using the --gtest_throw_on_failure flag."""
146 self.RunAndVerify(env_var_value=None,
149 self.RunAndVerify(env_var_value=None,
153 def testThrowOnFailureFlagOverridesEnvVar(self):
154 """Tests that --gtest_throw_on_failure overrides GTEST_THROW_ON_FAILURE."""
156 self.RunAndVerify(env_var_value='0',
159 self.RunAndVerify(env_var_value='0',
162 self.RunAndVerify(env_var_value='1',
165 self.RunAndVerify(env_var_value='1',
170 if __name__ == '__main__':
171 gtest_test_utils.Main()