public void Modify_ShouldReturn_ExampleDTO() { var entity = new ExampleDTO { Id = 1, Name = "Mock Name", Description = "Mock Description" }; var result = controller.Modify(entity); Assert.Multiple(() => { service.Verify(s => s.Modify(It.IsAny <ExampleEntity>()), Times.Once); Assert.NotNull(result); Assert.IsInstanceOf(typeof(OkObjectResult), result.Result); }); }