public void TestIfUniCanAddANewStudent()
        {
            University uni = new University();

            Student s  = new Student("A Student", 111, DateTime.ParseExact("20/10/1974", "dd/MM/yyyy", null));
            Student s2 = new Student("A Student", 112, DateTime.ParseExact("20/10/1974", "dd/MM/yyyy", null));

            uni.AddNewStudent(s);

            bool expected, actual;

            expected = false;
            actual   = uni.CheckIfStudentAlreadyExists(s2.ID);
            Assert.AreEqual(expected, actual);
        }