@Override
        public void run() {
          check();
        }
Constructors a MessageStreamAssert with an id and serde
@param id unique id
@param messageStream represents messageStream that you want to assert on
@param serde serde used to desialize messageStream
@param <M> represents type of Message
@return MessageStreamAssert that returns the the messages in the stream
samza-test/src/main/java/org/apache/samza/test/framework/MessageStreamAssert.java