@Test public void scheduleTest() { TestPriorityScheduler testScheduler = new TestPriorityScheduler(); PrioritySchedulerDefaultPriorityWrapper psw = new PrioritySchedulerDefaultPriorityWrapper(testScheduler, TaskPriority.Low); psw.schedule(DoNothingRunnable.instance(), 10); assertTrue(testScheduler.scheduleCalled); // reset and try with priority testScheduler.scheduleCalled = false; psw.schedule(DoNothingRunnable.instance(), 10, TaskPriority.High); assertTrue(testScheduler.scheduleCalled); }