如何使用NSubstitute來模擬一個懶類

Question

//Assert 
Lazy<INotificationService> notificationService = Substitute.For<Lazy<INotificationService>>(); 
Service target = new Service(repository, notificationService); 

//Act 
target.SendNotify("Message"); 

//Arrange 
notificationService.Received().Value.sendNotification(null, null, null, null); 

上面的代碼會引發異常。

的延遲初始化類型不具有公共，無參數的構造函數

我使用C＃4.0和NSubstitute 1.2.1

Answer 1

按@ sanosdole的評論，我會建議使用真實Lazy實例返回您的替代品。例如：

var notificationService = Substitute.For<INotificationService>(); 
var target = new Service(repository, new Lazy<INotificationService>(() => notificationService)); 

target.SendNotify("Message"); 

notificationService.ReceivedWithAnyArgs().sendNotification(null, null, null, null);