private final ActorFactory actorFactory = Mock()
    private final MaxNParallelTestClassProcessor processor = new MaxNParallelTestClassProcessor(2, factory, actorFactory)

    def createsThreadSafeWrapperForResultProcessorOnStart() {
        when:
        processor.startProcessing(resultProcessor)

        then:
        1 * actorFactory.createActor(resultProcessor) >> resultProcessorActor