1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
#!/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_')
# Utilities.
environ = os.environ.copy()
def SetEnvVar(env_var, value):
"""Sets an environment variable to a given value; unsets it when the
given value is None.
"""
if value is not None:
environ[env_var] = value
elif env_var in environ:
del environ[env_var]
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()
|
