Calendar events of all user overrides are shown for a user that has a user override, but does not belong in any group

1. Create a course C1.
2. Enrol students s1, s2, s3 and s4 to C1.
3. Create a group g1 in C1 with s2 and s3 as members.
4. Create an assignment with a due date.
5. Create user overrides for the assignment's due date for s1 and s2.
6. Create a group override for the assignment's due date for g1.
7. Login as s1 and go to the calendar.
   • Confirm that the calendar only displays the user override event for the assignment for s1.
8. Login as s2 and go to the calendar.
   • Confirm that the calendar only displays the user override event for the assignment for s2.
9. Login as s3 and go to the calendar.
   • Confirm that the calendar only displays the group override event for the assignment for g1.
10. Login as s4 and go to the calendar.
    • Confirm that the calendar only displays the assignment's original due date.

Bonus: Repeat the above tests, but for lesson and quiz activities.