public async Task WhenNavigatingToTheHasSignInPage_ThenTheARedirectToYourDetailsIsReturned()
        {
            SessionService.Get(Arg.Is("TempSupportRequestId")).Returns(REQUEST_ID.ToString());

            var actual = await sut.Index();

            actual.Should().BeOfType <RedirectToActionResult>();
        }
        public async Task WhenTheNoDfeSignInOptionIsSelected_ThenUserIsRedirectedToYourDetailsPage()
        {
            SessionService.Get(Arg.Is("TempSupportRequestId")).Returns(REQUEST_ID.ToString());

            var actual = await sut.Index(new HasSignInViewModel()
            {
                HasSignInAccount = false
            });

            var redirectResult = actual as RedirectToActionResult;

            Assert.AreEqual("YourDetails", redirectResult.ControllerName);
            Assert.AreEqual("Index", redirectResult.ActionName);
        }