human
Solve the following python programming problem given the following code:
def test_stringReceived() : 
    proto = MessageProtocol () 
    class C (object) : 
        def __init__(self, name, val) : 
            setattr (self, name, val) 
node = C ('message_received', MagicMock ()) 
    factory = C ('node', node) 
    setattr (proto, 'factory', factory) 
    msg = { 
        'type' : 'message', 
        'message' : 'hello', 
} 
    proto.stringReceived (json.dumps (msg)) 
    assert (1 == factory.factory.node.message_received.call_count) 
    assert (msg == proto.factory.node.message_received.call_args [0] [0]) 

    
    

    Fix the buggy line: assert (1 == factory.factory.node.message_received.call_count)
assistant
#Here is Python code to fix the buggy line: assert (1 == factory.

assert (1 == proto.factory.node.message_received.call_count)