How to test cookies in xUnit?

Question

ASP.NET

I'm doing testing, but when I need to add a cookie, I get an error:

NullReferenceException: "Object reference not set to an instance of an object."

Here is the code for testing:

var testsP = await controller.GetAllTest();
            var testsView = Assert.IsType<ActionResult<List<TestView>>>(testsP);
            var testsVw = Assert.IsType<OkObjectResult>(testsView.Result);
            var tests = Assert.IsAssignableFrom<List<TestView>>(testsVw.Value);


            controller.Response.Cookies.Append("test", new Mock<string>().Object) // Ошибка тут, выдают такую же ошибку в контроллере при добавление cookie

Answer 1

0. You have Response or Cookies = null
1. What do you want to test anyway?
2. Why are you trying to do Response.Cookies.Append
3. Google asp net core integration tests
https://www.dotnetcurry.com/aspnet-core/1420/integ...
https://docs.microsoft.com/en -us/aspnet/core/test/...
https://www.syncfusion.com/blogs/post/how-to-integ...

Answer 2

Mock filling the request and response with the controller
Add cookies to httpResponse and httpRequest
I don’t know if this is correct, but I make mocks for myself

#region Mock

            // Not working - IsAjaxRequest() is static extension method and cannot be mocked
            // request.Setup(x => x.IsAjaxRequest()).Returns(true /* or false */);
            // use this

            var httpResponse = new Mock<HttpResponseBase>();
            httpResponse.SetupGet(x => x.Headers).Returns(
                new System.Net.WebHeaderCollection {
                    {"X-Requested-With", "XMLHttpRequest"}
                });

            var httpRequest = new Mock<HttpRequestBase>();
            httpRequest.SetupGet(x => x.Headers).Returns(
                new System.Net.WebHeaderCollection {
                    {"X-Requested-With", "XMLHttpRequest"}
                });
            httpRequest.SetupGet(x => x.IsAuthenticated).Returns(false);
            httpRequest.SetupGet(x => x.ServerVariables).Returns(new NameValueCollection());
            httpRequest.SetupGet(x => x.UserHostAddress).Returns("192.168.1.1");

            var context = new Mock<HttpContextBase>();
            context.SetupGet(x => x.Request).Returns(httpRequest.Object);
            context.SetupGet(x => x.Response).Returns(httpResponse.Object);
            context.SetupGet(x => x.User).Returns(new CustomPrincipal(""));

            controller.ControllerContext = new ControllerContext(context.Object, new RouteData(), controller);
            #endregion