public async Task EditAdmin_Valid_Test() { CityAdministrationViewModel admin = new CityAdministrationViewModel(); _mapper.Setup(m => m.Map <CityAdministrationViewModel, CityAdministrationDTO>(It.IsAny <CityAdministrationViewModel>())) .Returns(new CityAdministrationDTO()); _cityAdministrationService.Setup(c => c.EditAdministratorAsync(It.IsAny <CityAdministrationDTO>())); _logger.Setup(l => l.LogInformation(It.IsAny <string>())); CitiesController citycon = CreateCityController; var result = await citycon.EditAdmin(admin); Assert.NotNull(result); Assert.IsInstanceOf <OkObjectResult>(result); }