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#!/usr/bin/env python
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"""Tests the --help flag of Google C++ Testing Framework.
SYNOPSIS
gtest_help_test.py --gtest_build_dir=BUILD/DIR
# where BUILD/DIR contains the built gtest_help_test_ file.
gtest_help_test.py
"""
__author__ = 'wan@google.com (Zhanyong Wan)'
import gtest_test_utils
import os
import re
import unittest
IS_WINDOWS = os.name == 'nt'
if IS_WINDOWS:
PROGRAM = 'gtest_help_test_.exe'
else:
PROGRAM = 'gtest_help_test_'
PROGRAM_PATH = os.path.join(gtest_test_utils.GetBuildDir(), PROGRAM)
FLAG_PREFIX = '--gtest_'
CATCH_EXCEPTIONS_FLAG = FLAG_PREFIX + 'catch_exceptions'
# The help message must match this regex.
HELP_REGEX = re.compile(
FLAG_PREFIX + r'list_tests.*' +
FLAG_PREFIX + r'filter=.*' +
FLAG_PREFIX + r'also_run_disabled_tests.*' +
FLAG_PREFIX + r'repeat=.*' +
FLAG_PREFIX + r'color=.*' +
FLAG_PREFIX + r'print_time.*' +
FLAG_PREFIX + r'output=.*' +
FLAG_PREFIX + r'break_on_failure.*' +
FLAG_PREFIX + r'throw_on_failure.*',
re.DOTALL)
def RunWithFlag(flag):
"""Runs gtest_help_test_ with the given flag.
Returns:
the exit code and the text output as a tuple.
Args:
flag: the command-line flag to pass to gtest_help_test_, or None.
"""
if flag is None:
command = [PROGRAM_PATH]
else:
command = [PROGRAM_PATH, flag]
child = gtest_test_utils.Subprocess(command)
return child.exit_code, child.output
class GTestHelpTest(unittest.TestCase):
"""Tests the --help flag and its equivalent forms."""
def TestHelpFlag(self, flag):
"""Verifies that the right message is printed and the tests are
skipped when the given flag is specified."""
exit_code, output = RunWithFlag(flag)
self.assertEquals(0, exit_code)
self.assert_(HELP_REGEX.search(output), output)
if IS_WINDOWS:
self.assert_(CATCH_EXCEPTIONS_FLAG in output, output)
else:
self.assert_(CATCH_EXCEPTIONS_FLAG not in output, output)
def testPrintsHelpWithFullFlag(self):
self.TestHelpFlag('--help')
def testPrintsHelpWithShortFlag(self):
self.TestHelpFlag('-h')
def testPrintsHelpWithQuestionFlag(self):
self.TestHelpFlag('-?')
def testPrintsHelpWithWindowsStyleQuestionFlag(self):
self.TestHelpFlag('/?')
def testRunsTestsWithoutHelpFlag(self):
"""Verifies that when no help flag is specified, the tests are run
and the help message is not printed."""
exit_code, output = RunWithFlag(None)
self.assert_(exit_code != 0)
self.assert_(not HELP_REGEX.search(output), output)
if __name__ == '__main__':
gtest_test_utils.Main()