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dynamicbitset/gtest-1.7.0/test/gtest_break_on_failure_unittest.py
Go to file| #!/usr/bin/env python | |
| # | |
| # Copyright 2006, Google Inc. | |
| # All rights reserved. | |
| # | |
| # Redistribution and use in source and binary forms, with or without | |
| # modification, are permitted provided that the following conditions are | |
| # met: | |
| # | |
| # * Redistributions of source code must retain the above copyright | |
| # notice, this list of conditions and the following disclaimer. | |
| # * Redistributions in binary form must reproduce the above | |
| # copyright notice, this list of conditions and the following disclaimer | |
| # in the documentation and/or other materials provided with the | |
| # distribution. | |
| # * Neither the name of Google Inc. nor the names of its | |
| # contributors may be used to endorse or promote products derived from | |
| # this software without specific prior written permission. | |
| # | |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| """Unit test for Google Test's break-on-failure mode. | |
| A user can ask Google Test to seg-fault when an assertion fails, using | |
| either the GTEST_BREAK_ON_FAILURE environment variable or the | |
| --gtest_break_on_failure flag. This script tests such functionality | |
| by invoking gtest_break_on_failure_unittest_ (a program written with | |
| Google Test) with different environments and command line flags. | |
| """ | |
| __author__ = 'wan@google.com (Zhanyong Wan)' | |
| import gtest_test_utils | |
| import os | |
| import sys | |
| # Constants. | |
| IS_WINDOWS = os.name == 'nt' | |
| # The environment variable for enabling/disabling the break-on-failure mode. | |
| BREAK_ON_FAILURE_ENV_VAR = 'GTEST_BREAK_ON_FAILURE' | |
| # The command line flag for enabling/disabling the break-on-failure mode. | |
| BREAK_ON_FAILURE_FLAG = 'gtest_break_on_failure' | |
| # The environment variable for enabling/disabling the throw-on-failure mode. | |
| THROW_ON_FAILURE_ENV_VAR = 'GTEST_THROW_ON_FAILURE' | |
| # The environment variable for enabling/disabling the catch-exceptions mode. | |
| CATCH_EXCEPTIONS_ENV_VAR = 'GTEST_CATCH_EXCEPTIONS' | |
| # Path to the gtest_break_on_failure_unittest_ program. | |
| EXE_PATH = gtest_test_utils.GetTestExecutablePath( | |
| 'gtest_break_on_failure_unittest_') | |
| environ = gtest_test_utils.environ | |
| SetEnvVar = gtest_test_utils.SetEnvVar | |
| # Tests in this file run a Google-Test-based test program and expect it | |
| # to terminate prematurely. Therefore they are incompatible with | |
| # the premature-exit-file protocol by design. Unset the | |
| # premature-exit filepath to prevent Google Test from creating | |
| # the file. | |
| SetEnvVar(gtest_test_utils.PREMATURE_EXIT_FILE_ENV_VAR, None) | |
| def Run(command): | |
| """Runs a command; returns 1 if it was killed by a signal, or 0 otherwise.""" | |
| p = gtest_test_utils.Subprocess(command, env=environ) | |
| if p.terminated_by_signal: | |
| return 1 | |
| else: | |
| return 0 | |
| # The tests. | |
| class GTestBreakOnFailureUnitTest(gtest_test_utils.TestCase): | |
| """Tests using the GTEST_BREAK_ON_FAILURE environment variable or | |
| the --gtest_break_on_failure flag to turn assertion failures into | |
| segmentation faults. | |
| """ | |
| def RunAndVerify(self, env_var_value, flag_value, expect_seg_fault): | |
| """Runs gtest_break_on_failure_unittest_ and verifies that it does | |
| (or does not) have a seg-fault. | |
| 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. | |
| expect_seg_fault: 1 if the program is expected to generate a seg-fault; | |
| 0 otherwise. | |
| """ | |
| SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, 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' % BREAK_ON_FAILURE_FLAG | |
| else: | |
| flag = '--%s' % BREAK_ON_FAILURE_FLAG | |
| command = [EXE_PATH] | |
| if flag: | |
| command.append(flag) | |
| if expect_seg_fault: | |
| should_or_not = 'should' | |
| else: | |
| should_or_not = 'should not' | |
| has_seg_fault = Run(command) | |
| SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, None) | |
| msg = ('when %s%s, an assertion failure in "%s" %s cause a seg-fault.' % | |
| (BREAK_ON_FAILURE_ENV_VAR, env_var_value_msg, ' '.join(command), | |
| should_or_not)) | |
| self.assert_(has_seg_fault == expect_seg_fault, msg) | |
| def testDefaultBehavior(self): | |
| """Tests the behavior of the default mode.""" | |
| self.RunAndVerify(env_var_value=None, | |
| flag_value=None, | |
| expect_seg_fault=0) | |
| def testEnvVar(self): | |
| """Tests using the GTEST_BREAK_ON_FAILURE environment variable.""" | |
| self.RunAndVerify(env_var_value='0', | |
| flag_value=None, | |
| expect_seg_fault=0) | |
| self.RunAndVerify(env_var_value='1', | |
| flag_value=None, | |
| expect_seg_fault=1) | |
| def testFlag(self): | |
| """Tests using the --gtest_break_on_failure flag.""" | |
| self.RunAndVerify(env_var_value=None, | |
| flag_value='0', | |
| expect_seg_fault=0) | |
| self.RunAndVerify(env_var_value=None, | |
| flag_value='1', | |
| expect_seg_fault=1) | |
| def testFlagOverridesEnvVar(self): | |
| """Tests that the flag overrides the environment variable.""" | |
| self.RunAndVerify(env_var_value='0', | |
| flag_value='0', | |
| expect_seg_fault=0) | |
| self.RunAndVerify(env_var_value='0', | |
| flag_value='1', | |
| expect_seg_fault=1) | |
| self.RunAndVerify(env_var_value='1', | |
| flag_value='0', | |
| expect_seg_fault=0) | |
| self.RunAndVerify(env_var_value='1', | |
| flag_value='1', | |
| expect_seg_fault=1) | |
| def testBreakOnFailureOverridesThrowOnFailure(self): | |
| """Tests that gtest_break_on_failure overrides gtest_throw_on_failure.""" | |
| SetEnvVar(THROW_ON_FAILURE_ENV_VAR, '1') | |
| try: | |
| self.RunAndVerify(env_var_value=None, | |
| flag_value='1', | |
| expect_seg_fault=1) | |
| finally: | |
| SetEnvVar(THROW_ON_FAILURE_ENV_VAR, None) | |
| if IS_WINDOWS: | |
| def testCatchExceptionsDoesNotInterfere(self): | |
| """Tests that gtest_catch_exceptions doesn't interfere.""" | |
| SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, '1') | |
| try: | |
| self.RunAndVerify(env_var_value='1', | |
| flag_value='1', | |
| expect_seg_fault=1) | |
| finally: | |
| SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, None) | |
| if __name__ == '__main__': | |
| gtest_test_utils.Main() |