googletest/test/gtest_uninitialized_test.py

#!/usr/bin/env python
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"""Verifies that Google Test warns the user when not initialized properly."""

__author__ = 'wan@google.com (Zhanyong Wan)'

import gtest_test_utils
import os
import sys
import unittest

IS_WINDOWS = os.name == 'nt'
IS_LINUX = os.name == 'posix'

if IS_WINDOWS:
  BUILD_DIRS = [
      'build.dbg\\',
      'build.opt\\',
      'build.dbg8\\',
      'build.opt8\\',
      ]
  COMMAND = 'gtest_uninitialized_test_.exe'

if IS_LINUX:
  COMMAND = os.path.join(gtest_test_utils.GetBuildDir(),
                         'gtest_uninitialized_test_')


def Assert(condition):
  if not condition:
    raise AssertionError


def AssertEq(expected, actual):
  if expected != actual:
    print 'Expected: %s' % (expected,)
    print '  Actual: %s' % (actual,)
    raise AssertionError


def GetOutput(command):
  """Runs the given command and returns its output."""

  stdin, stdout = os.popen2(command, 't')
  stdin.close()
  output = stdout.read()
  stdout.close()
  return output


def TestExitCodeAndOutput(command):
  """Runs the given command and verifies its exit code and output."""

  # Verifies that 'command' exits with code 1.
  if IS_WINDOWS:
    # On Windows, os.system(command) returns the exit code of 'command'.
    AssertEq(1, os.system(command))
  else:
    # On Unix-like system, os.system(command) returns 256 times the
    # exit code of 'command'.
    AssertEq(256, os.system(command))

  output = GetOutput(command)
  Assert('InitGoogleTest' in output)


if IS_WINDOWS:

  def main():
    for build_dir in BUILD_DIRS:
      command = build_dir + COMMAND
      print 'Testing with %s . . .' % (command,)
      TestExitCodeAndOutput(command)
    return 0

  if __name__ == '__main__':
    main()


if IS_LINUX:

  class GTestUninitializedTest(unittest.TestCase):
    def testExitCodeAndOutput(self):
      TestExitCodeAndOutput(COMMAND)


  if __name__ == '__main__':
    gtest_test_utils.Main()