3 # Copyright 2006, Google Inc.
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions are
10 # * Redistributions of source code must retain the above copyright
11 # notice, this list of conditions and the following disclaimer.
12 # * Redistributions in binary form must reproduce the above
13 # copyright notice, this list of conditions and the following disclaimer
14 # in the documentation and/or other materials provided with the
16 # * Neither the name of Google Inc. nor the names of its
17 # contributors may be used to endorse or promote products derived from
18 # this software without specific prior written permission.
20 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 """Unit test for Google Test's break-on-failure mode.
34 A user can ask Google Test to seg-fault when an assertion fails, using
35 either the GTEST_BREAK_ON_FAILURE environment variable or the
36 --gtest_break_on_failure flag. This script tests such functionality
37 by invoking gtest_break_on_failure_unittest_ (a program written with
38 Google Test) with different environments and command line flags.
41 __author__ = 'wan@google.com (Zhanyong Wan)'
43 import gtest_test_utils
50 IS_WINDOWS = os.name == 'nt'
52 # The environment variable for enabling/disabling the break-on-failure mode.
53 BREAK_ON_FAILURE_ENV_VAR = 'GTEST_BREAK_ON_FAILURE'
55 # The command line flag for enabling/disabling the break-on-failure mode.
56 BREAK_ON_FAILURE_FLAG = 'gtest_break_on_failure'
58 # The environment variable for enabling/disabling the throw-on-failure mode.
59 THROW_ON_FAILURE_ENV_VAR = 'GTEST_THROW_ON_FAILURE'
61 # The environment variable for enabling/disabling the catch-exceptions mode.
62 CATCH_EXCEPTIONS_ENV_VAR = 'GTEST_CATCH_EXCEPTIONS'
64 # Path to the gtest_break_on_failure_unittest_ program.
65 EXE_PATH = gtest_test_utils.GetTestExecutablePath(
66 'gtest_break_on_failure_unittest_')
72 environ = os.environ.copy()
75 def SetEnvVar(env_var, value):
76 """Sets an environment variable to a given value; unsets it when the
81 environ[env_var] = value
82 elif env_var in environ:
87 """Runs a command; returns 1 if it was killed by a signal, or 0 otherwise."""
89 p = gtest_test_utils.Subprocess(command, env=environ)
90 if p.terminated_by_signal:
99 class GTestBreakOnFailureUnitTest(gtest_test_utils.TestCase):
100 """Tests using the GTEST_BREAK_ON_FAILURE environment variable or
101 the --gtest_break_on_failure flag to turn assertion failures into
105 def RunAndVerify(self, env_var_value, flag_value, expect_seg_fault):
106 """Runs gtest_break_on_failure_unittest_ and verifies that it does
107 (or does not) have a seg-fault.
110 env_var_value: value of the GTEST_BREAK_ON_FAILURE environment
111 variable; None if the variable should be unset.
112 flag_value: value of the --gtest_break_on_failure flag;
113 None if the flag should not be present.
114 expect_seg_fault: 1 if the program is expected to generate a seg-fault;
118 SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, env_var_value)
120 if env_var_value is None:
121 env_var_value_msg = ' is not set'
123 env_var_value_msg = '=' + env_var_value
125 if flag_value is None:
127 elif flag_value == '0':
128 flag = '--%s=0' % BREAK_ON_FAILURE_FLAG
130 flag = '--%s' % BREAK_ON_FAILURE_FLAG
137 should_or_not = 'should'
139 should_or_not = 'should not'
141 has_seg_fault = Run(command)
143 SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, None)
145 msg = ('when %s%s, an assertion failure in "%s" %s cause a seg-fault.' %
146 (BREAK_ON_FAILURE_ENV_VAR, env_var_value_msg, ' '.join(command),
148 self.assert_(has_seg_fault == expect_seg_fault, msg)
150 def testDefaultBehavior(self):
151 """Tests the behavior of the default mode."""
153 self.RunAndVerify(env_var_value=None,
157 def testEnvVar(self):
158 """Tests using the GTEST_BREAK_ON_FAILURE environment variable."""
160 self.RunAndVerify(env_var_value='0',
163 self.RunAndVerify(env_var_value='1',
168 """Tests using the --gtest_break_on_failure flag."""
170 self.RunAndVerify(env_var_value=None,
173 self.RunAndVerify(env_var_value=None,
177 def testFlagOverridesEnvVar(self):
178 """Tests that the flag overrides the environment variable."""
180 self.RunAndVerify(env_var_value='0',
183 self.RunAndVerify(env_var_value='0',
186 self.RunAndVerify(env_var_value='1',
189 self.RunAndVerify(env_var_value='1',
193 def testBreakOnFailureOverridesThrowOnFailure(self):
194 """Tests that gtest_break_on_failure overrides gtest_throw_on_failure."""
196 SetEnvVar(THROW_ON_FAILURE_ENV_VAR, '1')
198 self.RunAndVerify(env_var_value=None,
202 SetEnvVar(THROW_ON_FAILURE_ENV_VAR, None)
205 def testCatchExceptionsDoesNotInterfere(self):
206 """Tests that gtest_catch_exceptions doesn't interfere."""
208 SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, '1')
210 self.RunAndVerify(env_var_value='1',
214 SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, None)
217 if __name__ == '__main__':
218 gtest_test_utils.Main()