public void Details()
        {
            var repMock = new Mock<IFakultetRepository<Students>>();
            Students student = new Students() { BI = "10011", Ime = "Pera", Prezime = "Peric", Adresa = "Ulica1", Grad = "Grad1" };

            repMock.Setup(x => x.GetEntityById(student.BI)).Returns(student);
            controller = new StudentsController(repMock.Object);
            ViewResult result = controller.Details(student.BI) as ViewResult;
            repMock.VerifyAll();
            Students s = result.ViewData.Model as Students;
            Assert.IsNotNull(s);
            Assert.AreEqual("10011", s.BI);
            Assert.AreEqual("Details", result.ViewName);
        }