public void AddLecturerToCourseRedirectUserToIndexAfterAdd()
        {
            var    mock = new Mock <ICourseRepository>();
            string name = "teacher1";
            int    id   = 1;

            mock.Setup(course => course.AddLecturerToCourse(name, id)).Verifiable();
            AdminController controller = new AdminController(mock.Object);

            RedirectToRouteResult result = controller.AddLecturerToCourse(id, name) as RedirectToRouteResult;

            Assert.AreEqual("Index", result.RouteValues["action"]);
        }