public void School_AddNewCourse()
{
var school = new School();
var course = new Course("Math");
school.AddCourse(course);
bool isCourseAdded = school.CheckIfCourseExists(course);
Assert.IsTrue(isCourseAdded);
}
public void School_CreateNewSchool()
{
var school = new School();
bool isSchoolAdded = school is School;
Assert.IsTrue(isSchoolAdded);
}