模擬方法被調用，但驗證返回 false

Question

使用 Moq，我有一個正在調用的方法，但測試中的驗證失敗，說明它不是。 令人困惑的是，模擬 object 中似乎有一個調用。 逐步調試，代碼使其成為有問題的方法。

測試中的代碼

[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());
}

被調用的代碼

 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);
 }

感謝任何指導

Answer 1

好的，部分感謝@canton7 我想通了。 不得不做一些搜索，但想出了如何。

Verify需要采取任何類型的Exception ，然后我可以在那里檢查屬性。

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