219 lines
7.0 KiB
Python
219 lines
7.0 KiB
Python
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#!/usr/bin/env python
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#
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# Copyright 2006, Google Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""Unit test for Google Test's break-on-failure mode.
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A user can ask Google Test to seg-fault when an assertion fails, using
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either the GTEST_BREAK_ON_FAILURE environment variable or the
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--gtest_break_on_failure flag. This script tests such functionality
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by invoking gtest_break_on_failure_unittest_ (a program written with
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Google Test) with different environments and command line flags.
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"""
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__author__ = 'wan@google.com (Zhanyong Wan)'
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import gtest_test_utils
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import os
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import sys
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# Constants.
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IS_WINDOWS = os.name == 'nt'
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# The environment variable for enabling/disabling the break-on-failure mode.
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BREAK_ON_FAILURE_ENV_VAR = 'GTEST_BREAK_ON_FAILURE'
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# The command line flag for enabling/disabling the break-on-failure mode.
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BREAK_ON_FAILURE_FLAG = 'gtest_break_on_failure'
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# The environment variable for enabling/disabling the throw-on-failure mode.
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THROW_ON_FAILURE_ENV_VAR = 'GTEST_THROW_ON_FAILURE'
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# The environment variable for enabling/disabling the catch-exceptions mode.
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CATCH_EXCEPTIONS_ENV_VAR = 'GTEST_CATCH_EXCEPTIONS'
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# Path to the gtest_break_on_failure_unittest_ program.
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EXE_PATH = gtest_test_utils.GetTestExecutablePath(
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'gtest_break_on_failure_unittest_')
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# Utilities.
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environ = os.environ.copy()
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def SetEnvVar(env_var, value):
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"""Sets an environment variable to a given value; unsets it when the
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given value is None.
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"""
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if value is not None:
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environ[env_var] = value
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elif env_var in environ:
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del environ[env_var]
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def Run(command):
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"""Runs a command; returns 1 if it was killed by a signal, or 0 otherwise."""
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p = gtest_test_utils.Subprocess(command, env=environ)
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if p.terminated_by_signal:
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return 1
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else:
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return 0
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# The tests.
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class GTestBreakOnFailureUnitTest(gtest_test_utils.TestCase):
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"""Tests using the GTEST_BREAK_ON_FAILURE environment variable or
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the --gtest_break_on_failure flag to turn assertion failures into
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segmentation faults.
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"""
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def RunAndVerify(self, env_var_value, flag_value, expect_seg_fault):
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"""Runs gtest_break_on_failure_unittest_ and verifies that it does
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(or does not) have a seg-fault.
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Args:
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env_var_value: value of the GTEST_BREAK_ON_FAILURE environment
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variable; None if the variable should be unset.
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flag_value: value of the --gtest_break_on_failure flag;
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None if the flag should not be present.
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expect_seg_fault: 1 if the program is expected to generate a seg-fault;
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0 otherwise.
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"""
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SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, env_var_value)
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if env_var_value is None:
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env_var_value_msg = ' is not set'
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else:
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env_var_value_msg = '=' + env_var_value
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if flag_value is None:
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flag = ''
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elif flag_value == '0':
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flag = '--%s=0' % BREAK_ON_FAILURE_FLAG
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else:
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flag = '--%s' % BREAK_ON_FAILURE_FLAG
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command = [EXE_PATH]
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if flag:
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command.append(flag)
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if expect_seg_fault:
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should_or_not = 'should'
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else:
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should_or_not = 'should not'
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has_seg_fault = Run(command)
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SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, None)
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msg = ('when %s%s, an assertion failure in "%s" %s cause a seg-fault.' %
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(BREAK_ON_FAILURE_ENV_VAR, env_var_value_msg, ' '.join(command),
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should_or_not))
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self.assert_(has_seg_fault == expect_seg_fault, msg)
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def testDefaultBehavior(self):
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"""Tests the behavior of the default mode."""
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self.RunAndVerify(env_var_value=None,
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flag_value=None,
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expect_seg_fault=0)
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def testEnvVar(self):
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"""Tests using the GTEST_BREAK_ON_FAILURE environment variable."""
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self.RunAndVerify(env_var_value='0',
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flag_value=None,
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expect_seg_fault=0)
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self.RunAndVerify(env_var_value='1',
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flag_value=None,
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expect_seg_fault=1)
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def testFlag(self):
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"""Tests using the --gtest_break_on_failure flag."""
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self.RunAndVerify(env_var_value=None,
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flag_value='0',
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expect_seg_fault=0)
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self.RunAndVerify(env_var_value=None,
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flag_value='1',
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expect_seg_fault=1)
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def testFlagOverridesEnvVar(self):
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"""Tests that the flag overrides the environment variable."""
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self.RunAndVerify(env_var_value='0',
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flag_value='0',
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expect_seg_fault=0)
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self.RunAndVerify(env_var_value='0',
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flag_value='1',
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expect_seg_fault=1)
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self.RunAndVerify(env_var_value='1',
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flag_value='0',
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expect_seg_fault=0)
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self.RunAndVerify(env_var_value='1',
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flag_value='1',
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expect_seg_fault=1)
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def testBreakOnFailureOverridesThrowOnFailure(self):
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"""Tests that gtest_break_on_failure overrides gtest_throw_on_failure."""
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SetEnvVar(THROW_ON_FAILURE_ENV_VAR, '1')
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try:
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self.RunAndVerify(env_var_value=None,
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flag_value='1',
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expect_seg_fault=1)
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finally:
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SetEnvVar(THROW_ON_FAILURE_ENV_VAR, None)
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if IS_WINDOWS:
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def testCatchExceptionsDoesNotInterfere(self):
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"""Tests that gtest_catch_exceptions doesn't interfere."""
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SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, '1')
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try:
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self.RunAndVerify(env_var_value='1',
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flag_value='1',
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expect_seg_fault=1)
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finally:
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SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, None)
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if __name__ == '__main__':
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gtest_test_utils.Main()
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