def test_command_line(self):
        command_line = [u"hello", u"there"]
        fake_docker = FakeDockerClient()
        deployer = ApplicationNodeDeployer(u'example.com', fake_docker)

        application_name = u'site-example.com'
        application = Application(
            name=application_name,
            image=DockerImage.from_string(u"postgresql"),
            command_line=command_line)

        StartApplication(
            application=application,
            node_state=EMPTY_NODESTATE,
        ).run(deployer, state_persister=InMemoryStatePersister())

        self.assertEqual(
            fake_docker._units[application_name].command_line,
            pvector(command_line),
        )
``StartApplication.run()`` passes an ``Application``'s
dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/test/test_container.py/StartApplicationTests.test_command_line