gistfile1.cs

        [Test]
        public void When_requesting_the_admin_categories_add_post_page_result_is_correct()
        {
            var repository = new Mock<IRepository<Category>>();

            repository.Setup(x=>x.Save(It.IsAny<Category>())).Verifiable();

            var controller = new AdminController(repository.Object);
            var  viewModel = new CategoriesAddViewModel();
            var result = controller.CategoriesAdd(viewModel);
            result.Should().BeAssignableTo<RedirectToRouteResult>();
            ((RedirectToRouteResult)result).RouteValues["Action"].Should().Be("Categories");
            ((RedirectToRouteResult)result).RouteValues["Controller"].Should().Be("Admin");

            repository.VerifyAll();
        }