public void AddCourse_AddCoursesForStudents_true()
        {
            Student newStudent = new Student("Joe", DateTime.Today);
            Course  course1    = new Course("Math Party", "MTH505");
            Course  course2    = new Course("Intro", "CS101");

            newStudent.Save();
            course1.Save();
            course2.Save();
            List <Course> expectedList = new List <Course> {
                course1
            };

            newStudent.AddCourse(course1.GetId());
            List <Course> result = newStudent.GetAllCourses();

            Assert.Equal(result, expectedList);
        }