Using Moq to mock ASP.NET MVC HttpContextBase

Here’s my little example about how to use Moq to mock HttpContextBase and it’s members to make controller tests pass. You can use this code when you are not allowed to use open-source or use-on-your-own-risk pieces of software that provide you this kind on initialization using built-in features. Also it is good exercise that introduces you how to solve mocking problems.

Here’s the simple example to get started.

var controller = new MyController();

var server = new Mock<HttpServerUtilityBase>(MockBehavior.Loose);
var response = new Mock<HttpResponseBase>(MockBehavior.Strict);

var request = new Mock<HttpRequestBase>(MockBehavior.Strict);
request.Setup(r => r.UserHostAddress).Returns("");

var session = new Mock<HttpSessionStateBase>();
session.Setup(s => s.SessionID).Returns(Guid.NewGuid().ToString());

var context = new Mock<HttpContextBase>();
context.SetupGet(c => c.Request).Returns(request.Object);
context.SetupGet(c => c.Response).Returns(response.Object);
context.SetupGet(c => c.Server).Returns(server.Object);
context.SetupGet(c => c.Session).Returns(session.Object);

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

Same way you can also mock other members of HttpContextBase.

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View Comments (6)

  • Hi,

    Nice post. Good timing :) was just thinking about how to do this.

    So your Mocking the HttpContextBase without a creating a wrapper for it? Do you have a larger example available maybe a sample project that has the controller code?


  • What is the ControllerContext ? And the namespace ?

    re: new ControllerContext(context.Object,
    new RouteData(), controller);

  • Hi, thanks for this sample, was just what I needed.

    @Zeb: Just instantiate your own controller in the first line, and remember to add the System.Web.Routing namespace in your using statements.

  • Nice and concise, but some explanation of your choices of strict mocks for some types and loose mocks for other types would be very helpful.

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