I am trying to follow the typical pattern of overriding the ControllerContext in order to mock HttpContext. In my case I specifically want to test HTTP POSTS so i need to mock Request.Form.
I have tried all 3 flavours found on google - with Moq, with Rhino.Mocks and with the MVCContrib.TestHelpers. For my specifics I've not been able to find a solution.
When my controller tries to bind the model, i get the following error:
Object reference not set to an instance of an object.
System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Web.Infrastructure.DynamicValidationHelper.ValidationUtility.CollectionReplacer.GetUnvalidatedCollections(HttpContext context)
at System.Web.Helpers.Validation.Unvalidated(HttpRequest request)
at System.Web.Mvc.FormValueProviderFactory.<.ctor>b__0(ControllerContext cc)
at System.Web.Mvc.FormValueProviderFactory.GetValueProvider(ControllerContext controllerContext)
at System.Web.Mvc.ValueProviderFactoryCollection.<>c__DisplayClassc.<GetValueProvider>b__7(ValueProviderFactory factory)
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList(IEnumerable`1 source)
at System.Web.Mvc.ValueProviderFactoryCollection.GetValueProvider(ControllerContext controllerContext)
at System.Web.Mvc.Controller.TryUpdateModel(TModel model)
at eServices.Admin.Web.Controllers.User.UserController.Search() in UserController.cs: line 56
at eServices.Admin.Specs.Controllers.when_the_user_controller_is_posted_the_manage_users_find_form.<.ctor>b__1() in UserControllerSpecs.cs: line 96
Which appears to suggest it is not finding the mocked form. Here's the test code snippet:
MoqHttpContext MoqHttpContext = new MoqHttpContext();
var sut = new UserController(
UserRepository,
EmailService,
SessionProvider);
var controllerContext = new ControllerContext
(new RequestContext(MoqHttpContext.GetHttpContext(), new RouteData()), sut);
sut.ControllerContext = controllerContext;
MoqHttpContext.FormData.Add("FindCriteria.SearchText", "searchText");
MoqHttpContext.FormData.Add("FindCriteria.AccountIsPending", "true");
sut.Search();
...
in the controller:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Search()
{
var manageUsersViewModel = new ManageUsersViewModel();
TryUpdateModel(manageUsersViewModel);
...
Any ideas or better solutions for testing POSTs?
Using MvcContrib.TestHelper:
// arrange
var sut = new SomeController();
var tcb = new TestControllerBuilder();
tcb.InitializeController(sut);
var formValues = new FormCollection()
{
{ "FindCriteria.SearchText", "searchText" },
{ "FindCriteria.AccountIsPending", "true" },
};
sut.ValueProvider = formValues.ToValueProvider();
// act
var actual = sut.Search();
// assert
...
Any ideas or better solutions for testing POSTs?
Yes: instead of using TryUpdateModel have your controller actions directly take the view model as argument:
[HttpPost]
public ActionResult Search(ManageUsersViewModel model)
{
...
}
then in your unit test:
// arrange
var sut = new SomeController();
var model = new ManageUsersViewModel
{
FindCriteria = new FindCriteria
{
SearchText = "searchText",
AccountIsPending = true
}
};
// act
var actual = sut.Search(model);
// assert
...
Related
We have the following lines in one of the functions in the MVC controller.
public ActionResult EditEmp(int eId = 0)
{
EPermission ePermission = (EPermission)HttpContext.Items["empPermission"];
}
In my unit test, I am calling this controller to test.
public void TestMethod1()
{
var result = eController.EditEmp(10) as ViewResult;
}
My test case fails because there is no value in the HttpContext for empPermission during the runtime.
We are wondering how can we populate the HttpContext.Items with a value so it can pick up during the runtime. We have look for some examples in mock, but not any luck so far.
You need to mock the HttpContext. Here is an example of code that should run in your unit test (preferably on TestInitialize) before calling your controller method:
var httpRequest = new HttpRequest("", "http://mySomething/", "");
var stringWriter = new StringWriter();
var httpResponce = new HttpResponse(stringWriter);
var httpContext = new HttpContext(httpRequest, httpResponce);
var sessionContainer = new HttpSessionStateContainer("id", new SessionStateItemCollection(),
new HttpStaticObjectsCollection(), 10, true,
HttpCookieMode.AutoDetect,
SessionStateMode.InProc, false);
httpContext.Items["AspSession"] = typeof(HttpSessionState).GetConstructor(
BindingFlags.NonPublic | BindingFlags.Instance,
null, CallingConventions.Standard,
new[] { typeof(HttpSessionStateContainer) },
null)
.Invoke(new object[] { sessionContainer });
HttpContext.Current = httpContext;
HttpContext.Current.User = new GenericPrincipal(
new GenericIdentity("WSUSER"),
new string[0]
Possible repeat of Mock HttpContext.Current in Test Init Method
public async Task <ActionResult>Select(DWorkingTimeSelection dto) {
var session = HttpUtils.GetSeesion<User>("USER");
}
public static T GetSeesion<T>(string key) where T : class
{
if (HttpContext.Current == null)
{
return default(T);
}
return HttpContext.Current.Session[key] as T;
}
public async Task <ActionResult>Select(DWorkingTimeSelection dto) {
var session = HttpUtils.GetSeesion<User>("USER");
}
public static T GetSeesion<T>(string key) where T : class
{
if (HttpContext.Current == null)
{
return default(T);
}
return HttpContext.Current.Session[key] as T;
}
I use nunti to mock a request.
And I add the SessionStateItemCollection to the Controller 's ControllerContext .
I found that the HttpContext.Current is null but the Controller 's Session[]
is not null because it get from the Controller 's ControllerContext .
So what should I do to avoid the HttpContext.Current is null while mocking a request
You can mock the HttpContext:
public static HttpContext FakeHttpContext(HttpRequest request)
{
var stringWriter = new StringWriter();
var httpResponce = new HttpResponse(stringWriter);
var httpContext = new HttpContext(request, httpResponce);
var sessionContainer = new HttpSessionStateContainer(
"id",
new SessionStateItemCollection(),
new HttpStaticObjectsCollection(),
10,
true,
HttpCookieMode.AutoDetect,
SessionStateMode.InProc,
false);
httpContext.Items["AspSession"] =
typeof(HttpSessionState).GetConstructor(
BindingFlags.NonPublic | BindingFlags.Instance,
null,
CallingConventions.Standard,
new[] { typeof(HttpSessionStateContainer) },
null).Invoke(new object[] { sessionContainer });
return httpContext;
}
[TestMethod]
public void ActionTest()
{
var request = new HttpRequest(string.Empty, "url to the action that you are testing", string.Empty)
{
RequestType = "GET"
};
HttpContext.Current = FakeHttpContext(request);
var controller = new YourController();
//You need the get a Result property since it is an async action
var result = controller.ActionToTest(//the parameters that your action expects).Result;
Assert.IsNotNull(result);
}
EDIT (answering the questions in your comment):
In order tot get a session you need to call HttpContext.Current.Session and not the HttpContext.Current.Session["id"] because HttpContext.Current.Session["id"] tries to get an id key from your session.
Once you store it there it will be available through this call. You can test it:
HttpContext.Current.Session["id"] = 5;
Assert.AreEqual(HttpContext.Current.Session["id"],5);
Regarding the httpContext.Items statement:
(From MSDN)HttpContext.Items is a key/value collection that can be used to organize and share data between an IHttpModule interface and an IHttpHandler interface during an HTTP request.
The statement that you are asking for, simply crates a new HttpSessionState object by using reflection (because it has only internal constructors) associates it with the HttpSessionStateContainer that you created earlier and stores it in HttpContext.Items under AspSession. And an interesting thing is that HttpContext.Current.Session actually is a shortcut to HttpContext.Items["AspSession"]. So the assignment of HttpSessionState object to the AspSession key is the on that makes HttpContext.Current.Session to work.
Well,after mocking the HttpContext as Alex Art said .
Calling the following method will be fine.
var sessionItems = new SessionStateItemCollection();
sessionItems["SessionKey"] = new MyCustomObject();
SessionStateUtility.AddHttpSessionStateToContext(fakeHttpContext,
new HttpSessionStateContainer(SessionNameStorage.Suser,
sessionItems,
new HttpStaticObjectsCollection(),
20000,
true,
HttpCookieMode.AutoDetect,
SessionStateMode.InProc,
false
));
I have an MVC Controller Class that I am trying to Unit Test.
The particular ActionResult is like this
public ActionResult Create(Shipment newShipment)
{
do some stuff to create a shipmentID
...
return RedirectToAction("AddUnit",newShipment.ShipmentID);
}
I have mocked up the controller context etc and now I want to test that the newShipment.ShipmentID passed to the RedirectToAction call is what I expect.
I have a test (with lots of mocking of things in the setup phase)
[Test]
public void CreateSuccess()
{
//Arrange
var shipment = new Shipment();
shipment.Widgets = 2; //Make sure it a valid shipment otherwise
//Act
var result = controller.Create(shipment) as RedirectToRouteResult;
//Assert
Assert.IsNotNull(result);
Assert.AreEqual("AddUnits", result.RouteValues["action"]);
Assert.IsNull(result.RouteValues["controller"]);
...
And now I want to find an Assert to check that the shipmentID I pass to RedirectToAction is the right one. How do I retrieve its value?
(I believe this code works for real (ie the actual view gets the correct shipmentID) but I want to write a unit test ).
Actually, RedirectToActions can take parameters; below is a simplified example of how I tested for correct parameters in one. I'm using NUnit & FluentAssertions here.
[HttpPost]
public ActionResult RedirectMethod()
{
return RedirectToAction("Index", "Home", new { parameter = "Value" });
}
and then the test:
[Test]
public void RedirectSetsExpectedParameters()
{
var result = controller.RedirectMethod();
var redirectResult = result.As<RedirectToRouteResult>();
var expectedRedirectValues = new RouteValueDictionary
{
{ "parameter", "Value" },
{ "action", "Index" },
{ "controller", "Home" }
};
redirectResult
.RouteValues
.ShouldBeEquivalentTo(expectedRedirectValues,
"The redirect should look as I expect, including the parameters");
}
Here i given one sample for Redirect to action
public ActionResult Signupsuccess(string account_code, string plan)
{
..........
do some stuff
return RedirectToAction("SubscriptionPlan", "Settings");
}
I have mocked up controllercontext and passed some parameter to RedirectToAction call from controller to test method.Finally it tested both the expected and actual
[TestMethod()]
public void SignupsuccessTest()
{
HomeController target = new HomeController(); // TODO: Initialize to an appropriate value
string account_code = "B898YB7"; // TODO: Initialize to an appropriate value
string plan = "Application-BASIC"; // TODO: Initialize to an appropriate value
var ControllerContext = new Mock<ControllerContext>();
var context = target.HttpContext;
ControllerContext.SetupGet(p => p.HttpContext.Session["MerchantID"]).Returns("15");
ControllerContext.SetupGet(p => p.HttpContext.Session["FriendlyIdentifier"]).Returns("3d649876-19f5-48d2-af03-ca89083ae712");
target.ControllerContext = controllerContext.Object;
var action = (RedirectToRouteResult)target.Signupsuccess(account_code, plan);
action.RouteValues["action"].Equals("SubscriptionPlan");
action.RouteValues["controller"].Equals("Settings");
Assert.AreEqual("SubscriptionPlan", action.RouteValues["action"]);
Assert.AreEqual("Settings", action.RouteValues["controller"]);
}
I Hope really it will helpful for you.Thank You
I have the following unit test defined to test my model binder:
[TestMethod]
public void DateTime_Works() {
// Arrange
var controllerContext = FakeContext.GetAuthenticatedControllerContext(new Mock<Controller>().Object, "TestAdmin");
var values = new NameValueCollection {
{ "Foo.Date", "12/02/1964" },
{ "Foo.Hour", "12" },
{ "Foo.Minute", "00" },
{ "Foo.Second", "00" }
};
var bindingContext = new ModelBindingContext() { ModelName = "Foo", ValueProvider = new NameValueCollectionValueProvider(values, null) };
var binder = new DateAndTimeModelBinder();
// Act
var result = (DateTime)binder.BindModel(controllerContext, bindingContext);
// Assert
Assert.AreEqual(DateTime.Parse("1964-12-02 12:00:00"), result);
}
Here is the FakeContext class:
public static class FakeContext {
public static HttpContextBase GetHttpContext(string username) {
var context = new Mock<HttpContextBase>();
context.SetupGet(ctx => ctx.Request.IsAuthenticated).Returns(!string.IsNullOrEmpty(username));
return context.Object;
}
public static ControllerContext GetControllerContext(Controller controller) {
return GetAuthenticatedControllerContext(controller, null);
}
public static ControllerContext GetAuthenticatedControllerContext(Controller controller, string username) {
var httpContext = GetHttpContext(username);
return new ControllerContext(httpContext, new RouteData(), controller);
}
}
Within my model binder i call a utility method which has the following line in it:
HttpContext.Current.User.Identity.IsAuthenticated
This seems to always return false even when I pass a username in. I was wondering how the GetHttpContext method can be modified to mock this out aswell.
I'd appreciate the help. Thanks
You are mocking the IsAuthenticated property of the Request and not of the User Identity. Your mock is indicating that the request has been authenticated, but has nothing to do with the identity authentication.
Changing your mock up a little should fix your problem.
var identityMock = new Mock<IIdentity>();
identityMock.SetupGet( i => i.IsAuthenticated ).Returns( !string.IsNullOrEmpty(username));
var userMock = new Mock<IPrincipal>();
userMock.SetupGet( u => u.Identity ). Returns( identityMock.Object );
var context = new Mock<HttpContextBase>();
context.SetupGet( ctx => ctx.User ).Returns( userMock.Object );
Edit The more I thought about it the more I felt these mocks needed to be setup seperatly
Note, I have not executed this code. It should get you what you need however.
MSDN for Request.IsAuthenticated
http://msdn.microsoft.com/en-us/library/system.web.httprequest.isauthenticated.aspx
MSDN for User.Identity.IsAuthenticated
http://msdn.microsoft.com/en-us/library/system.security.principal.iidentity.isauthenticated.aspx
Hope this helps.
You could use Moq and follow the advice found here:
Moq: unit testing a method relying on HttpContext
I have a controller in C# using the ASP.Net MVC framework
public class HomeController:Controller{
public ActionResult Index()
{
if (Request.IsAjaxRequest())
{
//do some ajaxy stuff
}
return View("Index");
}
}
I got some tips on mocking and was hoping to test the code with the following and RhinoMocks
var mocks = new MockRepository();
var mockedhttpContext = mocks.DynamicMock<HttpContextBase>();
var mockedHttpRequest = mocks.DynamicMock<HttpRequestBase>();
SetupResult.For(mockedhttpContext.Request).Return(mockedHttpRequest);
var controller = new HomeController();
controller.ControllerContext = new ControllerContext(mockedhttpContext, new RouteData(), controller);
var result = controller.Index() as ViewResult;
Assert.AreEqual("About", result.ViewName);
However I keep getting this error:
Exception
System.ArgumentNullException:
System.ArgumentNullException : Value
cannot be null. Parameter name:
request at
System.Web.Mvc.AjaxRequestExtensions.IsAjaxRequest(HttpRequestBase
request)
Since the Request object on the controller has no setter. I tried to get this test working properly by using recommended code from an answer below.
This used Moq instead of RhinoMocks, and in using Moq I use the following for the same test:
var request = new Mock<HttpRequestBase>();
// Not working - IsAjaxRequest() is static extension method and cannot be mocked
// request.Setup(x => x.IsAjaxRequest()).Returns(true /* or false */);
// use this
request.SetupGet(x => x.Headers["X-Requested-With"]).Returns("XMLHttpRequest");
var context = new Mock<HttpContextBase>();
context.SetupGet(x => x.Request).Returns(request.Object);
var controller = new HomeController(Repository, LoginInfoProvider);
controller.ControllerContext = new ControllerContext(context.Object, new RouteData(), controller);
var result = controller.Index() as ViewResult;
Assert.AreEqual("About", result.ViewName);
but get the following error:
Exception System.ArgumentException:
System.ArgumentException : Invalid
setup on a non-overridable member: x
=> x.Headers["X-Requested-With"] at Moq.Mock.ThrowIfCantOverride(Expression
setup, MethodInfo methodInfo)
Again, it seems like I cannot set the request header.
How do I set this value, in RhinoMocks or Moq?
Using Moq:
var request = new Mock<HttpRequestBase>();
// Not working - IsAjaxRequest() is static extension method and cannot be mocked
// request.Setup(x => x.IsAjaxRequest()).Returns(true /* or false */);
// use this
request.SetupGet(x => x.Headers).Returns(
new System.Net.WebHeaderCollection {
{"X-Requested-With", "XMLHttpRequest"}
});
var context = new Mock<HttpContextBase>();
context.SetupGet(x => x.Request).Returns(request.Object);
var controller = new YourController();
controller.ControllerContext = new ControllerContext(context.Object, new RouteData(), controller);
UPDATED:
Mock Request.Headers["X-Requested-With"] or Request["X-Requested-With"] instead of Request.IsAjaxRequest().
For anyone using NSubstitute I was able to modify the above answers and do something like this... (where Details is the Action method name on the controller)
var fakeRequest = Substitute.For<HttpRequestBase>();
var fakeContext = Substitute.For<HttpContextBase>();
fakeRequest.Headers.Returns(new WebHeaderCollection { {"X-Requested-With", "XMLHttpRequest"}});
fakeContext.Request.Returns(fakeRequest);
controller.ControllerContext = new ControllerContext(fakeContext, new RouteData(), controller);
var model = new EntityTypeMaintenanceModel();
var result = controller.Details(model) as PartialViewResult;
Assert.IsNotNull(result);
Assert.AreEqual("EntityType", result.ViewName);
Here is a working solution using RhinoMocks. I've based it on a Moq solution I found at http://thegrayzone.co.uk/blog/2010/03/mocking-request-isajaxrequest/
public static void MakeAjaxRequest(this Controller controller)
{
MockRepository mocks = new MockRepository();
// Create mocks
var mockedhttpContext = mocks.DynamicMock<HttpContextBase>();
var mockedHttpRequest = mocks.DynamicMock<HttpRequestBase>();
// Set headers to pretend it's an Ajax request
SetupResult.For(mockedHttpRequest.Headers)
.Return(new WebHeaderCollection() {
{"X-Requested-With", "XMLHttpRequest"}
});
// Tell the mocked context to return the mocked request
SetupResult.For(mockedhttpContext.Request).Return(mockedHttpRequest);
mocks.ReplayAll();
// Set controllerContext
controller.ControllerContext = new ControllerContext(mockedhttpContext, new RouteData(), controller);
}
Is AjaxRequest is an extension method. So you can do it the following way using Rhino:
protected HttpContextBase BuildHttpContextStub(bool isAjaxRequest)
{
var httpRequestBase = MockRepository.GenerateStub<HttpRequestBase>();
if (isAjaxRequest)
{
httpRequestBase.Stub(r => r["X-Requested-With"]).Return("XMLHttpRequest");
}
var httpContextBase = MockRepository.GenerateStub<HttpContextBase>();
httpContextBase.Stub(c => c.Request).Return(httpRequestBase);
return httpContextBase;
}
// Build controller
....
controller.ControllerContext = new ControllerContext(BuildHttpContextStub(true), new RouteData(), controller);
Looks like you are looking for this,
var requestMock = new Mock<HttpRequestBase>();
requestMock.SetupGet(rq => rq["Age"]).Returns("2001");
Usage in Controller :
public ActionResult Index()
{
var age = Request["Age"]; //This will return 2001
}
In current .NET (v 5):
var controller = new SomeController(); // SomeController that inherits Microsoft.AspNetCore.Mvc.ControllerBase
var httpContext = new DefaultHttpContext(); // DefaultHttpContext class is part of Microsoft.AspNetCore.Http namespace
httpContext.Request.Headers.Add("origin", "0.0.0.1"); // Add your custom headers to request
controller.ControllerContext.HttpContext = httpContext;
You need to mock HttpContextBase and put it into your ControllerContext property, like that:
controller.ControllerContext =
new ControllerContext(mockedHttpContext, new RouteData(), controller);
To make IsAjaxRequest() to return false during Unit test you need to setup Request Headers as well as request collection value both in your test method as given below:
_request.SetupGet(x => x.Headers).Returns(new System.Net.WebHeaderCollection { { "X-Requested-With", "NotAjaxRequest" } });
_request.SetupGet(x=>x["X-Requested-With"]).Returns("NotAjaxRequest");
The reason for setting up both is hidden in implementation of IsAjaxRequest() which is given below:
public static bool IsAjaxRequest(this HttpRequestBase request)<br/>
{
if (request == null)
{
throw new ArgumentNullException("request");
}
return ((request["X-Requested-With"] == "XMLHttpRequest") || ((request.Headers != null) && (request.Headers["X-Requested-With"] == "XMLHttpRequest")));
}
It uses both request Collection and header this is why we need to create setup for both Header and Request Collection.
this will make the request to return false when it is not a ajax request. to make it return true you can do the following:
_httpContext.SetupGet(x => x.Request["X-Requested-With"]).Returns("XMLHttpRequest");
I found other way to add a HttpRequestMessage object into your request during Web API as follow
[Test]
public void TestMethod()
{
var controllerContext = new HttpControllerContext();
var request = new HttpRequestMessage();
request.Headers.Add("TestHeader", "TestHeader");
controllerContext.Request = request;
_controller.ControllerContext = controllerContext;
var result = _controller.YourAPIMethod();
//Your assertion
}
(A bit late to the party but I went for a different route so thought I'd share)
To go for a pure code/mocking way of testing this without creating mocks for Http classes I implemented an IControllerHelper which has an Initialise method which takes the Request as a parameter and then exposed properties I want eg:
public interface IControllerHelper
{
void Initialise(HttpRequest request);
string HostAddress { get; }
}
public class ControllerHelper : IControllerHelper
{
private HttpRequest _request;
public void Initialise(HttpRequest request)
{
_request = request;
}
public string HostAddress => _request.GetUri().GetLeftPart(UriPartial.Authority);
}
Then in my controller I call initialise at the start of the method:
_controllerHelper.Initialise(Request);
And then my code is only dependent on mockable dependacies.
return Created(new Uri($"{_controllerHelper.HostName}/api/MyEndpoint/{result.id}"), result);
For functional tests I just override the iControllerHelper in the composition for a substitute.