Assert.assertTrue(mockEventHandler.event.getPriority().getPriority() == 3);
scheduler.scheduleTask(mockEvent2); // R1 runs another. Reordered priority
Assert.assertTrue(mockEventHandler.event.getPriority().getPriority() == 2);
scheduler.scheduleTask(mockEvent2f); // R1 runs retry. Reordered priority
Assert.assertTrue(mockEventHandler.event.getPriority().getPriority() == 2);
scheduler.vertexCompleted(mockVertex1); // M completes
scheduler.scheduleTask(mockEvent3); // R2 starts. Reordered priority
Assert.assertTrue(mockEventHandler.event.getPriority().getPriority() == 5);
scheduler.scheduleTask(mockEvent2); // R1 runs another. Normal priority
Assert.assertTrue(mockEventHandler.event.getPriority().getPriority() == 6);
scheduler.scheduleTask(mockEvent2f); // R1 runs retry. Retry priority