jensandClaude Sonnet 4.6 5ef7f13118 tests: add test suite for jay_diff; fix two bugs found ...

Move the inline assertions from jay_diff.py into tests/test_jay_diff.py
as proper pytest functions, grouped by function under test.  Add corner
cases for numeric/bool/None/list values, completely different structures,
empty containers, deep nesting, type changes (dict↔scalar), and
parametrised round-trip tests (diff→merge produces new).

Two bugs fixed during the exercise:
- jay_diff_rev: guard against _old being a non-dict (type change from
  dict to scalar caused TypeError on item assignment)
- jay_merge_delete / jay_merge_update: already fixed in previous commit;
  covered by new tests

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-05-27 11:54:57 +02:00

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