def __init__(self):
        SystemHost.__init__(self)
        self.web = web.Web()

        self._scm = None

        # Everything below this line is WebKit-specific and belongs on a higher-level object.
        self.buildbot = buildbot.BuildBot()

        # FIXME: Unfortunately Port objects are currently the central-dispatch objects of the NRWT world.
        # In order to instantiate a port correctly, we have to pass it at least an executive, user, scm, and filesystem
        # so for now we just pass along the whole Host object.
        # FIXME: PortFactory doesn't belong on this Host object if Port is going to have a Host (circular dependency).
        self.port_factory = PortFactory(self)

        self._engage_awesome_locale_hacks()

    def setUp(self):
        # A real PlatformInfo object is used here instead of a
        # MockPlatformInfo because we need to actually check for
        # Windows and Mac to skip some tests.
        self._platform = SystemHost().platform

        # FIXME: Remove this when we fix test-webkitpy to work
        # properly on cygwin (bug 63846).
        self.should_test_processes = not self._platform.is_win()

class RunTest(unittest.TestCase, StreamTestingMixin):
    def setUp(self):
        # A real PlatformInfo object is used here instead of a
        # MockPlatformInfo because we need to actually check for
        # Windows and Mac to skip some tests.
        self._platform = SystemHost().platform

        # FIXME: Remove this when we fix test-webkitpy to work
        # properly on cygwin (bug 63846).
        self.should_test_processes = not self._platform.is_win()

    def test_basic(self):
        options, args = parse_args(tests_included=True)
        logging_stream = StringIO.StringIO()
        host = MockHost()
        port_obj = host.port_factory.get(options.platform, options)
        details = run_webkit_tests.run(port_obj, options, args, logging_stream)

        # These numbers will need to be updated whenever we add new tests.
        self.assertEqual(details.initial_results.total, test.TOTAL_TESTS)
        self.assertEqual(details.initial_results.expected_skips, test.TOTAL_SKIPS)
        self.assertEqual(len(details.initial_results.unexpected_results_by_name), test.UNEXPECTED_PASSES + test.UNEXPECTED_FAILURES)
        self.assertEqual(details.exit_code, test.UNEXPECTED_FAILURES)
        self.assertEqual(details.retry_results.total, test.TOTAL_RETRIES)

        one_line_summary = "%d tests ran as expected, %d didn't:\n" % (
            details.initial_results.total - details.initial_results.expected_skips - len(details.initial_results.unexpected_results_by_name),
            len(details.initial_results.unexpected_results_by_name))
        self.assertTrue(one_line_summary in logging_stream.buflist)

        # Ensure the results were summarized properly.
        self.assertEqual(details.summarized_results['num_regressions'], details.exit_code)

        # Ensure the image diff percentage is in the results.
        self.assertEqual(details.summarized_results['tests']['failures']['expected']['image.html']['image_diff_percent'], 1)

        # Ensure the results were written out and displayed.
        full_results_text = host.filesystem.read_text_file('/tmp/layout-test-results/full_results.json')
        json_to_eval = full_results_text.replace("ADD_RESULTS(", "").replace(");", "")
        self.assertEqual(json.loads(json_to_eval), details.summarized_results)

        self.assertEqual(host.user.opened_urls, [path.abspath_to_uri(MockHost().platform, '/tmp/layout-test-results/results.html')])


    def test_batch_size(self):
        batch_tests_run = get_test_batches(['--batch-size', '2'])
        for batch in batch_tests_run:
            self.assertTrue(len(batch) <= 2, '%s had too many tests' % ', '.join(batch))

    def test_max_locked_shards(self):
        # Tests for the default of using one locked shard even in the case of more than one child process.
        if not self.should_test_processes:
            return
        save_env_webkit_test_max_locked_shards = None
        if "WEBKIT_TEST_MAX_LOCKED_SHARDS" in os.environ:
            save_env_webkit_test_max_locked_shards = os.environ["WEBKIT_TEST_MAX_LOCKED_SHARDS"]
            del os.environ["WEBKIT_TEST_MAX_LOCKED_SHARDS"]
        _, regular_output, _ = logging_run(['--debug-rwt-logging', '--child-processes', '2'], shared_port=False)
        try:
            self.assertTrue(any(['1 locked' in line for line in regular_output.buflist]))
        finally:
            if save_env_webkit_test_max_locked_shards:
                os.environ["WEBKIT_TEST_MAX_LOCKED_SHARDS"] = save_env_webkit_test_max_locked_shards

    def test_child_processes_2(self):
        if self.should_test_processes:
            _, regular_output, _ = logging_run(
                ['--debug-rwt-logging', '--child-processes', '2'], shared_port=False)
            self.assertTrue(any(['Running 2 ' in line for line in regular_output.buflist]))

    def test_child_processes_min(self):
        if self.should_test_processes:
            _, regular_output, _ = logging_run(
                ['--debug-rwt-logging', '--child-processes', '2', '-i', 'passes/passes', 'passes'],
                tests_included=True, shared_port=False)
            self.assertTrue(any(['Running 1 ' in line for line in regular_output.buflist]))

    def test_dryrun(self):
        tests_run = get_tests_run(['--dry-run'])
        self.assertEqual(tests_run, [])

        tests_run = get_tests_run(['-n'])
        self.assertEqual(tests_run, [])

    def test_exception_raised(self):
        # Exceptions raised by a worker are treated differently depending on
        # whether they are in-process or out. inline exceptions work as normal,
        # which allows us to get the full stack trace and traceback from the
        # worker. The downside to this is that it could be any error, but this
        # is actually useful in testing.
        #
        # Exceptions raised in a separate process are re-packaged into
        # WorkerExceptions (a subclass of BaseException), which have a string capture of the stack which can
        # be printed, but don't display properly in the unit test exception handlers.
        self.assertRaises(BaseException, logging_run,
            ['failures/expected/exception.html', '--child-processes', '1'], tests_included=True)

        if self.should_test_processes:
            self.assertRaises(BaseException, logging_run,
                ['--child-processes', '2', '--force', 'failures/expected/exception.html', 'passes/text.html'], tests_included=True, shared_port=False)
#.........这里部分代码省略.........