1#!/usr/bin/env python
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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
45environ = os.environ.copy()
46
47
48def AssertEq(expected, actual):
49  if expected != actual:
50    print 'Expected: %s' % (expected,)
51    print '  Actual: %s' % (actual,)
52    raise AssertionError
53
54
55def SetEnvVar(env_var, value):
56  """Sets the env variable to 'value'; unsets it when 'value' is None."""
57
58  if value is not None:
59    environ[env_var] = value
60  elif env_var in environ:
61    del environ[env_var]
62
63
64def GetFlag(flag):
65  """Runs gtest_env_var_test_ and returns its output."""
66
67  args = [COMMAND]
68  if flag is not None:
69    args += [flag]
70  return gtest_test_utils.Subprocess(args, env=environ).output
71
72
73def TestFlag(flag, test_val, default_val):
74  """Verifies that the given flag is affected by the corresponding env var."""
75
76  env_var = 'GTEST_' + flag.upper()
77  SetEnvVar(env_var, test_val)
78  AssertEq(test_val, GetFlag(flag))
79  SetEnvVar(env_var, None)
80  AssertEq(default_val, GetFlag(flag))
81
82
83class GTestEnvVarTest(gtest_test_utils.TestCase):
84  def testEnvVarAffectsFlag(self):
85    """Tests that environment variable should affect the corresponding flag."""
86
87    TestFlag('break_on_failure', '1', '0')
88    TestFlag('color', 'yes', 'auto')
89    TestFlag('filter', 'FooTest.Bar', '*')
90    TestFlag('output', 'xml:tmp/foo.xml', '')
91    TestFlag('print_time', '0', '1')
92    TestFlag('repeat', '999', '1')
93    TestFlag('throw_on_failure', '1', '0')
94    TestFlag('death_test_style', 'threadsafe', 'fast')
95
96    if IS_WINDOWS:
97      TestFlag('catch_exceptions', '1', '0')
98
99    if IS_LINUX:
100      TestFlag('death_test_use_fork', '1', '0')
101      TestFlag('stack_trace_depth', '0', '100')
102
103
104if __name__ == '__main__':
105  gtest_test_utils.Main()
106