Unit tests

HomeControllerTests.cs

public void User_can_write_story_when_authenticated()
{
    var controller = new HomeController();
    controller.ControllerContext = new ControllerContext
    {
        HttpContext = new DefaultHttpContext
        {
            User = new ClaimsPrincipal(new ClaimsIdentity(new Claim[]
            {
                new Claim(ClaimTypes.Name, "username")
            }, "someAuthTypeName"))
        }
    };

    var actionResult = controller.Index();

    var viewResult = Assert.IsType<ViewResult>(actionResult);
    var model = Assert.IsType<HomePageViewModel>(viewResult.Model);
    Assert.True(model.CanWriteStory);
}