public void testTaskScheduleEventIsSendOnTaskDurationChange() {
TaskManager taskManager = getTaskManager();
Task task1 = taskManager.createTask();
TaskListenerImpl listener = new TaskListenerImpl(taskManager);
taskManager.addTaskListener(listener);
TaskMutator mutator = task1.createMutator();
mutator.setDuration(taskManager.createLength(GregorianTimeUnitStack.DAY,
5));
mutator.commit();
assertTrue("Listener has not been called on task duration change",