ref: 33afddadb9af6569bd8296ef1d48d0511b651e9d
dir: /third_party/googletest/src/test/gtest_throw_on_failure_test.py/
#!/usr/bin/env python
#
# Copyright 2009, Google Inc.
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# * Redistributions of source code must retain the above copyright
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"""Tests Google Test's throw-on-failure mode with exceptions disabled.
This script invokes gtest_throw_on_failure_test_ (a program written with
Google Test) with different environments and command line flags.
"""
__author__ = 'wan@google.com (Zhanyong Wan)'
import os
import gtest_test_utils
# Constants.
# The command line flag for enabling/disabling the throw-on-failure mode.
THROW_ON_FAILURE = 'gtest_throw_on_failure'
# Path to the gtest_throw_on_failure_test_ program, compiled with
# exceptions disabled.
EXE_PATH = gtest_test_utils.GetTestExecutablePath(
'gtest_throw_on_failure_test_')
# Utilities.
def SetEnvVar(env_var, value):
"""Sets an environment variable to a given value; unsets it when the
given value is None.
"""
env_var = env_var.upper()
if value is not None:
os.environ[env_var] = value
elif env_var in os.environ:
del os.environ[env_var]
def Run(command):
"""Runs a command; returns True/False if its exit code is/isn't 0."""
print 'Running "%s". . .' % ' '.join(command)
p = gtest_test_utils.Subprocess(command)
return p.exited and p.exit_code == 0
# The tests. TODO(wan@google.com): refactor the class to share common
# logic with code in gtest_break_on_failure_unittest.py.
class ThrowOnFailureTest(gtest_test_utils.TestCase):
"""Tests the throw-on-failure mode."""
def RunAndVerify(self, env_var_value, flag_value, should_fail):
"""Runs gtest_throw_on_failure_test_ and verifies that it does
(or does not) exit with a non-zero code.
Args:
env_var_value: value of the GTEST_BREAK_ON_FAILURE environment
variable; None if the variable should be unset.
flag_value: value of the --gtest_break_on_failure flag;
None if the flag should not be present.
should_fail: True iff the program is expected to fail.
"""
SetEnvVar(THROW_ON_FAILURE, env_var_value)
if env_var_value is None:
env_var_value_msg = ' is not set'
else:
env_var_value_msg = '=' + env_var_value
if flag_value is None:
flag = ''
elif flag_value == '0':
flag = '--%s=0' % THROW_ON_FAILURE
else:
flag = '--%s' % THROW_ON_FAILURE
command = [EXE_PATH]
if flag:
command.append(flag)
if should_fail:
should_or_not = 'should'
else:
should_or_not = 'should not'
failed = not Run(command)
SetEnvVar(THROW_ON_FAILURE, None)
msg = ('when %s%s, an assertion failure in "%s" %s cause a non-zero '
'exit code.' %
(THROW_ON_FAILURE, env_var_value_msg, ' '.join(command),
should_or_not))
self.assert_(failed == should_fail, msg)
def testDefaultBehavior(self):
"""Tests the behavior of the default mode."""
self.RunAndVerify(env_var_value=None, flag_value=None, should_fail=False)
def testThrowOnFailureEnvVar(self):
"""Tests using the GTEST_THROW_ON_FAILURE environment variable."""
self.RunAndVerify(env_var_value='0',
flag_value=None,
should_fail=False)
self.RunAndVerify(env_var_value='1',
flag_value=None,
should_fail=True)
def testThrowOnFailureFlag(self):
"""Tests using the --gtest_throw_on_failure flag."""
self.RunAndVerify(env_var_value=None,
flag_value='0',
should_fail=False)
self.RunAndVerify(env_var_value=None,
flag_value='1',
should_fail=True)
def testThrowOnFailureFlagOverridesEnvVar(self):
"""Tests that --gtest_throw_on_failure overrides GTEST_THROW_ON_FAILURE."""
self.RunAndVerify(env_var_value='0',
flag_value='0',
should_fail=False)
self.RunAndVerify(env_var_value='0',
flag_value='1',
should_fail=True)
self.RunAndVerify(env_var_value='1',
flag_value='0',
should_fail=False)
self.RunAndVerify(env_var_value='1',
flag_value='1',
should_fail=True)
if __name__ == '__main__':
gtest_test_utils.Main()