public void SuccessTest() { var accountProviderMock = new Mock <IAccountProvider>(); accountProviderMock.Setup(x => x.GetSettingsViewModel(It.IsAny <Guid>())).Returns(new SettingsViewModel()); var accountMediator = new AccountMediatorBuilder().With(accountProviderMock.Object).Build(); var response = accountMediator.Settings(Guid.NewGuid(), SettingsViewModel.SettingsMode.YourAccount); response.AssertCodeAndMessage(AccountMediatorCodes.Settings.Success); }