/firmware/tests/gtest-1.4.0/test/gtest_help_test.py

  1#!/usr/bin/env python
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 31
 32"""Tests the --help flag of Google C++ Testing Framework.
 33
 34SYNOPSIS
 35       gtest_help_test.py --gtest_build_dir=BUILD/DIR
 36         # where BUILD/DIR contains the built gtest_help_test_ file.
 37       gtest_help_test.py
 38"""
 39
 40__author__ = 'wan@google.com (Zhanyong Wan)'
 41
 42import os
 43import re
 44import gtest_test_utils
 45
 46
 47IS_WINDOWS = os.name == 'nt'
 48
 49PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('gtest_help_test_')
 50FLAG_PREFIX = '--gtest_'
 51CATCH_EXCEPTIONS_FLAG = FLAG_PREFIX + 'catch_exceptions'
 52DEATH_TEST_STYLE_FLAG = FLAG_PREFIX + 'death_test_style'
 53
 54# The help message must match this regex.
 55HELP_REGEX = re.compile(
 56    FLAG_PREFIX + r'list_tests.*' +
 57    FLAG_PREFIX + r'filter=.*' +
 58    FLAG_PREFIX + r'also_run_disabled_tests.*' +
 59    FLAG_PREFIX + r'repeat=.*' +
 60    FLAG_PREFIX + r'shuffle.*' +
 61    FLAG_PREFIX + r'random_seed=.*' +
 62    FLAG_PREFIX + r'color=.*' +
 63    FLAG_PREFIX + r'print_time.*' +
 64    FLAG_PREFIX + r'output=.*' +
 65    FLAG_PREFIX + r'break_on_failure.*' +
 66    FLAG_PREFIX + r'throw_on_failure.*',
 67    re.DOTALL)
 68
 69
 70def RunWithFlag(flag):
 71  """Runs gtest_help_test_ with the given flag.
 72
 73  Returns:
 74    the exit code and the text output as a tuple.
 75  Args:
 76    flag: the command-line flag to pass to gtest_help_test_, or None.
 77  """
 78
 79  if flag is None:
 80    command = [PROGRAM_PATH]
 81  else:
 82    command = [PROGRAM_PATH, flag]
 83  child = gtest_test_utils.Subprocess(command)
 84  return child.exit_code, child.output
 85
 86
 87class GTestHelpTest(gtest_test_utils.TestCase):
 88  """Tests the --help flag and its equivalent forms."""
 89
 90  def TestHelpFlag(self, flag):
 91    """Verifies that the right message is printed and the tests are
 92    skipped when the given flag is specified."""
 93
 94    exit_code, output = RunWithFlag(flag)
 95    self.assertEquals(0, exit_code)
 96    self.assert_(HELP_REGEX.search(output), output)
 97    if IS_WINDOWS:
 98      self.assert_(CATCH_EXCEPTIONS_FLAG in output, output)
 99      self.assert_(DEATH_TEST_STYLE_FLAG not in output, output)
100    else:
101      self.assert_(CATCH_EXCEPTIONS_FLAG not in output, output)
102      self.assert_(DEATH_TEST_STYLE_FLAG in output, output)
103
104  def testPrintsHelpWithFullFlag(self):
105    self.TestHelpFlag('--help')
106
107  def testPrintsHelpWithShortFlag(self):
108    self.TestHelpFlag('-h')
109
110  def testPrintsHelpWithQuestionFlag(self):
111    self.TestHelpFlag('-?')
112
113  def testPrintsHelpWithWindowsStyleQuestionFlag(self):
114    self.TestHelpFlag('/?')
115
116  def testRunsTestsWithoutHelpFlag(self):
117    """Verifies that when no help flag is specified, the tests are run
118    and the help message is not printed."""
119
120    exit_code, output = RunWithFlag(None)
121    self.assert_(exit_code != 0)
122    self.assert_(not HELP_REGEX.search(output), output)
123
124
125if __name__ == '__main__':
126  gtest_test_utils.Main()