Due to the design of the DedicatedThreadStageDriver, it is meaningless
to independently test the start or finish methods; however, testing
both together is meaningful.
Due to the design of the SynchronousStageDriver, it is meaningless
to independently test the start or finish methods; however, testing
both together is meaningful.
Due to the design of the ThreadPoolStageDriver, it is meaningless
to independently test the start or finish methods; however, testing
both together is meaningful.