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1#!/usr/bin/env python
2#
3# Copyright 2008, Google Inc.
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions are
8# met:
9#
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
15# distribution.
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.
19#
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.
31
32"""Verifies that Google Test correctly parses environment variables."""
33
34__author__ = 'wan@google.com (Zhanyong Wan)'
35
36import gtest_test_utils
37import os
38import sys
39import unittest
40
41IS_WINDOWS = os.name == 'nt'
42IS_LINUX = os.name == 'posix'
43
44if IS_WINDOWS:
45  BUILD_DIRS = [
46      'build.dbg\\',
47      'build.opt\\',
48      'build.dbg8\\',
49      'build.opt8\\',
50      ]
51  COMMAND = 'gtest_env_var_test_.exe'
52
53if IS_LINUX:
54  COMMAND = os.path.join(gtest_test_utils.GetBuildDir(),
55                         'gtest_env_var_test_')
56
57
58def AssertEq(expected, actual):
59  if expected != actual:
60    print 'Expected: %s' % (expected,)
61    print '  Actual: %s' % (actual,)
62    raise AssertionError
63
64
65def SetEnvVar(env_var, value):
66  """Sets the env variable to 'value'; unsets it when 'value' is None."""
67
68  if value is not None:
69    os.environ[env_var] = value
70  elif env_var in os.environ:
71    del os.environ[env_var]
72
73
74def GetFlag(command, flag):
75  """Runs gtest_env_var_test_ and returns its output."""
76
77  cmd = command
78  if flag is not None:
79    cmd += ' %s' % (flag,)
80  stdin, stdout = os.popen2(cmd, 'b')
81  stdin.close()
82  line = stdout.readline()
83  stdout.close()
84  return line
85
86
87def TestFlag(command, flag, test_val, default_val):
88  """Verifies that the given flag is affected by the corresponding env var."""
89
90  env_var = 'GTEST_' + flag.upper()
91  SetEnvVar(env_var, test_val)
92  AssertEq(test_val, GetFlag(command, flag))
93  SetEnvVar(env_var, None)
94  AssertEq(default_val, GetFlag(command, flag))
95
96
97def TestEnvVarAffectsFlag(command):
98  """An environment variable should affect the corresponding flag."""
99
100  TestFlag(command, 'break_on_failure', '1', '0')
101  TestFlag(command, 'color', 'yes', 'auto')
102  TestFlag(command, 'filter', 'FooTest.Bar', '*')
103  TestFlag(command, 'output', 'tmp/foo.xml', '')
104  TestFlag(command, 'print_time', '1', '0')
105  TestFlag(command, 'repeat', '999', '1')
106  TestFlag(command, 'throw_on_failure', '1', '0')
107
108  if IS_WINDOWS:
109    TestFlag(command, 'catch_exceptions', '1', '0')
110  if IS_LINUX:
111    TestFlag(command, 'stack_trace_depth', '0', '100')
112    TestFlag(command, 'death_test_style', 'thread-safe', 'fast')
113    TestFlag(command, 'death_test_use_fork', '1', '0')
114
115
116if IS_WINDOWS:
117
118  def main():
119    for build_dir in BUILD_DIRS:
120      command = build_dir + COMMAND
121      print 'Testing with %s . . .' % (command,)
122      TestEnvVarAffectsFlag(command)
123    return 0
124
125  if __name__ == '__main__':
126    main()
127
128
129if IS_LINUX:
130
131  class GTestEnvVarTest(unittest.TestCase):
132    def testEnvVarAffectsFlag(self):
133      TestEnvVarAffectsFlag(COMMAND)
134
135
136  if __name__ == '__main__':
137    gtest_test_utils.Main()
138