How to Mock HttpContext.User.Identity.Name in Asp.Net MVC 4

Question

I have code in the controller which consumes HttpContext

public ActionResult Index() {     var currentUser=HttpContext.User.Identity.Name;    ......  } 

While trying to write test using NUnit like this

[Test] public void CanDisplayRequest() {     //Act     var result=  (ViewResult)_requestController.Index();      //Assert     Assert.IsInstanceOf<OrderRequest>(resut.Model); } 

Test will fail because it couldn't find HttpContext

So how can I mock HttpContext.Current.User.Identity.Name

I'm using Moq for Mocking

Answer 1

you can initialize your controller with fake context with fake principal as shown below

var fakeHttpContext = new Mock<HttpContextBase>(); var fakeIdentity = new GenericIdentity("User"); var principal = new GenericPrincipal(fakeIdentity, null);  fakeHttpContext.Setup(t => t.User).Returns(principal); var controllerContext = new Mock<ControllerContext>(); controllerContext.Setup(t => t.HttpContext).Returns(fakeHttpContext.Object);  _requestController = new RequestController();  //Set your controller ControllerContext with fake context _requestController.ControllerContext = controllerContext.Object; 

Answer 2

To do it using Microsoft tests only (no 3rd party frameworks), you can do as below:

public class MockHttpContextBase : HttpContextBase {     public override IPrincipal User { get; set; }  } 

And then...

        var userToTest = "User";         string[] roles = null;          var fakeIdentity = new GenericIdentity(userToTest);         var principal = new GenericPrincipal(fakeIdentity, roles);         var fakeHttpContext = new MockHttpContextBase { User = principal };         var controllerContext = new ControllerContext         {             HttpContext = fakeHttpContext         };          // This is the controller that we wish to test:         _requestController = new RequestController();          // Now set the controller ControllerContext with fake context         _requestController.ControllerContext = controllerContext;