FridaTveit
c3968d5066
Issue #253: Tried to improve grade school structure. (#259)
* Issue #253: Tried to improve grade school structure. Removed .db() function, added numberOfStudents functions and renamed the sort function to studentsByGradeAlphabetical. Added test to check that grade() gets the students in the order they were inserted. Removed getsStudentsInAGrade() test as what it was testing was already being covered by the tests before it.
* Added tests for protection agains mutation of the list object