public void TestServiceMethodShouldCallRepoMethodOnce()
{
//Given
var mockRepo = new Mock <IWatchRepository>();
var service = new WatchService(mockRepo.Object);
var alarmCode = 1;
//When
mockRepo.Setup(mr => mr.ReadAllAlarmSubscriptionsByAlarmCode(It.IsAny <int>())).Returns(It.IsAny <List <AlarmWatch> >());
service.GetAlarmSubscriptionsByAlarmCode(alarmCode);
//Then
mockRepo.Verify(mr => mr.ReadAllAlarmSubscriptionsByAlarmCode(It.IsAny <int>()), Times.Once);
}