### Question:
LiveNotificationEmailManager implements Initializable { public DateTime getNextExecutionDate() { if (!this.queue.isEmpty()) { return this.queue.peek().date; } else { return null; } }  void addEvent(Event event); void run(); DateTime getNextExecutionDate(); @Override void initialize();  }### Answer:
@Test public void testNextExecutionWithNoEvents() throws Exception { assertEquals(null, this.mocker.getComponentUnderTest().getNextExecutionDate()); }