human
Solve the following python programming problem given the following code:
@ if_docker_configured 
def test_environment(self) : 
    '
        The environment specified in an ``Application`` is passed to the
        container.
        ' 
    expected_variables = frozenset ({ 
        'key1' : 'value1', 
        'key2' : 'value2', 
}.items ()) 
    docker_dir = FilePath (__file__).sibling ('env-docker') 
    volume_service = create_volume_service (self) 
    image = DockerImageBuilder (test = self, source_dir = docker_dir) 
    d = image.build () 
    def image_built(image_name) : 
        application_name = random_name (self) 
        docker_client = DockerClient () 
        self.addCleanup (docker_client.remove, application_name) 
        deployer = P2PNodeDeployer ('localhost', volume_service, docker_client, make_memory_network (), node_uuid = uuid4 ()) 
        dataset = Dataset (dataset_id = unicode (uuid4 ()), metadata = pmap ({ 
            'name' : application_name, 
})) 
        manifestation = Manifestation (dataset = dataset, primary = True) 
        desired_state = Deployment (nodes = frozenset ([Node (uuid = deployer.node_uuid, applications = frozenset ([Application (name = application_name, image = DockerImage.from_string (image_name), environment = expected_variables, volume = AttachedVolume (manifestation = manifestation, mountpoint = FilePath ('/data')), links = frozenset ())]), manifestations = { 
            manifestation.dataset_id : manifestation, 
})])) 
        return change_node_state (deployer, desired_state) 
d.addCallback (expected_variables) 
    d.addCallback ((lambda _ : volume_service.enumerate ())) 
    d.addCallback ((lambda volumes : list (volumes) [0].get_filesystem ().get_path ().child (b'env'))) 
    def got_result_path(result_path) : 
        d = loop_until (reactor, result_path.exists) 
        d.addCallback ((lambda _ : result_path)) 
        return d 
d.addCallback (got_result_path) 
    def started(result_path) : 
        contents = result_path.getContent () 
        assertContainsAll (haystack = contents, test_case = self, needles =...

    
    

    Fix the buggy line: d.addCallback (expected_variables)
assistant
#Here is Python code to fix the buggy line: d.

d.addCallback (def image_built()