def make_driver(self, worker_number=0, xorg_running=False, executive=None): port = Port(MockSystemHost(log_executive=True, executive=executive), 'xvfbdrivertestport', options=MockOptions(configuration='Release')) port._config.build_directory = lambda configuration: "/mock-build" port._test_runner_process_constructor = MockServerProcess if xorg_running: port._executive._running_pids['Xorg'] = 108 driver = XvfbDriver(port, worker_number=worker_number, pixel_tests=True) driver._startup_delay_secs = 0 driver._xvfb_screen_depth = lambda: '24' driver._xvfb_pipe = lambda: (3, 4) driver._xvfb_read_display_id = lambda x: 1 driver._xvfb_close_pipe = lambda p: None driver._port_server_environment = port.setup_environ_for_server(port.driver_name()) return driver