public void TestRemoveCourseSuccessfully()
 {
     Course course = new Course();
     Student student = new Student("Gosho", 34000);
     course.JoinCourse(student);
     string result = course.RemoveCourse(student);
     Assert.AreEqual("Done!", result);
 }
 public void TestRemoveCourseStudentNotAddedToCourse()
 {
     Student student = new Student("Pesho", 23412);
     Course course = new Course();
     course.RemoveCourse(student);
 }