For the quadrant example, you can make up property tests without reimplementing the code:
for any x,y, if the quadrant is a left one, x-1,y should still fall in the same quadrant.
etc
The trick is, not to test a single call, but the relation of results on related input.
Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink.
Hide child comments as well
Confirm
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
For the quadrant example, you can make up property tests without reimplementing the code:
for any x,y, if the quadrant is a left one, x-1,y should still fall in the same quadrant.
etc
The trick is, not to test a single call, but the relation of results on related input.