HttpContext is null in the controller during Unit Testing in Asp.net MVC [duplicate]

This question already has an answer here:

• ASP.NET MVC unit test controller with HttpContext 5 answers

Here is my Asp.net Controller Property and Method

    public ApplicationSignInManager SignInManager
    {
        get
        {
            return _signInManager ?? HttpContext.GetOwinContext().Get<ApplicationSignInManager>();
        }
        private set { _signInManager = value; }
    }


    [HttpPost]
    [AllowAnonymous]
    [ValidateAntiForgeryToken]
    public async Task<ActionResult> Login(LoginViewModel model, string returnUrl)
    {
        if (!ModelState.IsValid)
        {
            return View(model);
        }

        // This doesn't count login failures towards account lockout
        // To enable password failures to trigger account lockout, change to shouldLockout: true
        var result = await SignInManager.PasswordSignInAsync(model.UserName, model.Password, model.RememberMe, shouldLockout: false);


        switch (result)
        {
            case SignInStatus.Success:
                return RedirectToLocal(returnUrl);             

            default:
                ModelState.AddModelError("", "Invalid login attempt.");
                return View(model);
        }
    }

My Unit Test

 [TestMethod]
    public void Login_WhenEnteredValidCredential_AllowsUserToLogIn()
    {

        var model = new LoginViewModel
        {
            Password = "TestPassWord1",
            UserName = "TestUserName",
            RememberMe = true
        };

        HttpContext.Current = new HttpContext(
    new HttpRequest(null, "http://tempuri.org", null),
    new HttpResponse(null));

       var accountController = new AccountController(); 
        var result= accountController.Login(model,null);
        Assert.AreEqual(result.Status,TaskStatus.RanToCompletion);


    }

The problem here is that whenever i run the unit test HttpContext inside the property SignInManager becomes null. Is there a way to set the HttpContext from the Unit Test? PLease note i have referred to this links but the solution there doesnt work me

Mock HttpContext using moq for unit test

Using httpcontext in unit test

http://ift.tt/1BrpkPW