How do you mock the session object collection using Moq

Question

I am using shanselmann\'s MvcMockHelper class to mock up some HttpContext stuff using Moq but the issue I am having is being able to assign something to my mocked session ob

Answer 1

Thank you, @RonnBlack for your solution! In my case, I kept getting this exception because Session.SessionID was null:

System.NotImplementedException was unhandled by user code
  HResult=-2147467263
  Message=The method or operation is not implemented.
  Source=System.Web
  StackTrace:
       at System.Web.HttpSessionStateBase.get_SessionID()

To solve this problem I implement @RonnBlack's code this way using the Moq Mock instead of his MockHttpSession:

    private readonly MyController controller = new MyController();

    [TestFixtureSetUp]
    public void Init()
    {
        var session = new Mock();
        session.Setup(s => s.SessionID).Returns(Guid.NewGuid().ToString());
        var request = new Mock();
        var response = new Mock();
        var server = new Mock();
        // 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();
        //context
        context.Setup(ctx => ctx.Request).Returns(request.Object);
        context.Setup(ctx => ctx.Response).Returns(response.Object);
        context.Setup(ctx => ctx.Session).Returns(session.Object);
        context.Setup(ctx => ctx.Server).Returns(server.Object);
        context.SetupGet(x => x.Request).Returns(request.Object);
        context.SetupGet(p => p.Request.Url).Returns(new Uri("http://www.mytesturl.com"));
        var queryString = new NameValueCollection { { "code", "codeValue" } };
        context.SetupGet(r => r.Request.QueryString).Returns(queryString);

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

For details, please see http://weblogs.asp.net/gunnarpeipman/using-moq-to-mock-asp-net-mvc-httpcontextbase