正在调用模拟的方法，但是Verify返回false

Question

使用Moq，我有一个被调用的方法，但是测试中的Verify失败，说明不是。似乎很困惑，模拟对象中只有一个调用。逐步调试，代码将其转到有问题的方法中。

测试中的代码

[Fact]
public async Task WhenUsernameAndPasswordAreEmpty_ThenDisplayErrorMessage() {
     mockAuthenticationService.Setup(mock => mock.SignInAsync(It.IsAny<string>(), It.IsAny<string>())).Throws(new NullReferenceException());

     var loginMessageReceived = false;

     mockAppService.Setup(mock => mock.IsBusy).Returns(false);
     mockLoginViewModel.Object.Username = string.Empty;
     mockLoginViewModel.Object.Password = string.Empty;

     MessagingCenter.Subscribe<LoginViewModel>(this, "LoginSuccessful", (obj) => {
          loginMessageReceived = true;
     });

     await mockLoginViewModel.Object.LoginCommand.ExecuteAsync();

     Equals(loginMessageReceived, false);
     mockAuthenticationService.Verify(auth => auth.SignInAsync(string.Empty, string.Empty), Times.Once());
     mockMessageService.Verify(msg => msg.DisplayLoginError(new Exception("You must enter both a username and password to login.")), Times.Once());
}

被调用的代码

 catch (NullReferenceException ex) {
     _messageService.DisplayLoginError(new Exception("You must enter both a username and password to login."));
     var properties = new Dictionary<string, string> {
           { "ExecuteLoginCommand", "You must enter both a username and password to login." },
           { "Username", Username },
           { "Password", Password }
     };
                Crashes.TrackError(ex, properties);
 }

赞赏任何指导

Answer 1

好吧，部分感谢@ canton7我知道了。不得不做一些搜索，但是想出了办法。

Verify需要采用任何类型的Exception，然后我才能在那里查看属性。

mockMessageService.Verify(msg => 
    msg.DisplayLoginError(It.Is<Exception>(ex => 
        ex.Message == "You must enter both a username and password to login."
    ))
    , Times.Once()
);