### Question:
SendFailedNotifications { public void clearSendFailedNotification(Account account) { int notificationId = NotificationIds.getSendFailedNotificationId(account); getNotificationManager().cancel(notificationId); } SendFailedNotifications(NotificationController controller, NotificationActionCreator actionBuilder); void showSendFailedNotification(Account account, Exception exception); void clearSendFailedNotification(Account account);  }### Answer:
@Test public void testClearSendFailedNotification() throws Exception { sendFailedNotifications.clearSendFailedNotification(account); verify(notificationManager).cancel(notificationId); }