Serialize and then deserialize a message. This simulates sending a message
between ROS nodes and makes sure that the ROS messages being tested are
actually serializable, and are in the same format as they would be received
over the network. In rospy, it is possible to assign an illegal data type
to a message field (for example, `message = String(data=42)`), but trying
to publish this message will throw `SerializationError: field data must be
of type str`. This method will expose such bugs.
Definition at line 523 of file test_message_converter.py.