public void FindLanguageById_Service_Success() { // Arrange languageService = new LanguageService(mockRepository.Object, mockLogger.Object, mockCache.Object, mockTelemetry.Object); mockRepository.Setup(x => x.FindById <Language>(It.IsAny <int>())).Returns(new Language()).Verifiable(); // Act var response = languageService.FindLanguageById(It.IsAny <int>()); // Assert Assert.IsNotNull(response); Assert.IsNotNull(response.Result); Assert.IsInstanceOfType(response, typeof(GenericServiceResponse <LanguageDto>)); mockRepository.Verify(x => x.FindById <Language>(It.IsAny <int>()), Times.Once); }