### Question:
TaskAssigningService { public void start(SolverDef solverDef, KieServerRegistry registry) { solverHandler = createSolverHandler(solverDef, registry, delegate, userSystemService, executorService, solverHandlerConfig); solverHandler.start(); } TaskAssigningService(TaskAssigningServiceConfig config); void setDelegate(TaskAssigningRuntimeDelegate delegate); void setUserSystemService(UserSystemService userSystemService); void setExecutorService(ScheduledExecutorService executorService); void start(SolverDef solverDef, KieServerRegistry registry); void destroy();  }### Answer:
@Test public void start() { taskAssigningService.start(solverDef, registry); verify(solverHandler).start(); }