public void When_Add_Products_Method_Is_Called_With_All_The_Valid_Data_Than_It_Returns_Product_Added_Sucessfully() { var okResult = _ProductController.AddToProductList(new Product() { ProductId = 123, ProductName = "Watch", ProductCost = 12000 }); var SuccessResult = okResult as OkObjectResult; var Result = Convert.ToString(SuccessResult.Value); //Assert Assert.Equal("{ message = Product Added Successfully }", Result); }