test_walk_topdown() attempts to handle all possible visitation orders, but the result is difficult to read. We can enforce a specific order by sorting dirnames.

test_walk_bottom_up() suffers similar problems, and also makes unjustified assertions about the order that siblings are visited (which is arbitrary and cannot be influenced by the user, contrary to top-down mode). It can be simplified to ensure that children are yielded before parents.

Linked PRs

• GH-103517: Improve tests for pathlib.Path.walk() #103518