public void UpdateCallSid_AnyCallId_CallNull_isCallerFalse() { // Setup dependence var settingMock = new Mock<ISettings>(); var componentMock = new Mock<IComponents>(); var uowMock = new Mock<IUnitOfWork>(); var repositoryMock = new Mock<IRepository>(); var serviceLocatorMock = new Mock<IServiceLocator>(); serviceLocatorMock.Setup(r => r.GetInstance<IRepository>()) .Returns(repositoryMock.Object); ServiceLocator.SetLocatorProvider(() => serviceLocatorMock.Object); // Arrange data Guid callId = Guid.NewGuid(); string receiverSid = "12345"; bool isCaller = false; // Act CallService callService = new CallService(uowMock.Object, repositoryMock.Object, settingMock.Object, componentMock.Object); CallDto currentCall = callService .UpdateCallSid(callId, receiverSid, isCaller); // Assert repositoryMock.Verify(r => r.FindById<Call>(callId)); Assert.AreEqual(currentCall, null); }