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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 os
37import gtest_test_utils
38
39
40IS_WINDOWS = os.name == 'nt'
41IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
42
43COMMAND = gtest_test_utils.GetTestExecutablePath('gtest_env_var_test_')
44
45
46def AssertEq(expected, actual):
47  if expected != actual:
48    print 'Expected: %s' % (expected,)
49    print '  Actual: %s' % (actual,)
50    raise AssertionError
51
52
53def SetEnvVar(env_var, value):
54  """Sets the env variable to 'value'; unsets it when 'value' is None."""
55
56  if value is not None:
57    os.environ[env_var] = value
58  elif env_var in os.environ:
59    del os.environ[env_var]
60
61
62def GetFlag(flag):
63  """Runs gtest_env_var_test_ and returns its output."""
64
65  args = [COMMAND]
66  if flag is not None:
67    args += [flag]
68  return gtest_test_utils.Subprocess(args).output
69
70
71def TestFlag(flag, test_val, default_val):
72  """Verifies that the given flag is affected by the corresponding env var."""
73
74  env_var = 'GTEST_' + flag.upper()
75  SetEnvVar(env_var, test_val)
76  AssertEq(test_val, GetFlag(flag))
77  SetEnvVar(env_var, None)
78  AssertEq(default_val, GetFlag(flag))
79
80
81class GTestEnvVarTest(gtest_test_utils.TestCase):
82  def testEnvVarAffectsFlag(self):
83    """Tests that environment variable should affect the corresponding flag."""
84
85    TestFlag('break_on_failure', '1', '0')
86    TestFlag('color', 'yes', 'auto')
87    TestFlag('filter', 'FooTest.Bar', '*')
88    TestFlag('output', 'xml:tmp/foo.xml', '')
89    TestFlag('print_time', '0', '1')
90    TestFlag('repeat', '999', '1')
91    TestFlag('throw_on_failure', '1', '0')
92    TestFlag('death_test_style', 'threadsafe', 'fast')
93
94    if IS_WINDOWS:
95      TestFlag('catch_exceptions', '1', '0')
96
97    if IS_LINUX:
98      TestFlag('death_test_use_fork', '1', '0')
99      TestFlag('stack_trace_depth', '0', '100')
100
101
102if __name__ == '__main__':
103  gtest_test_utils.Main()
104