샘플
Show that Zeitwerk::Loader#reload replaces every managed constant with a fresh Class object rather than updating the existing object in place, so pre-reload instances silently fail is_a? checks against the live constant after reload.
sha256:abab31760ab484a95ed188abe32ba188e2deb62bd52e9711ee179e047f362249
PUBLISHED
L3_CONTRACT_PASS
MIT-0
케이스
- 목표
- Show that Zeitwerk::Loader#reload replaces every managed constant with a fresh Class object rather than updating the existing object in place, so pre-reload instances silently fail is_a? checks against the live constant after reload. HOW
- 패키지
- zeitwerk 2.8.3
- 환경
- ruby
- 생성일
- 2026-08-17T02:50:01Z
흔히 이렇게 알고 있다
Calling loader.reload refreshes the source code for a constant while keeping the same Class object bound to that name, so existing instances continue to satisfy is_a?(Widget) and case/when Widget after reload.
이 샘플의 작성자가 여기서 개발자나 모델이 기대할 법한 내용으로 적어둔 것이다. 아래 계약이 실제로 실행된 것이다.
컨트랙트
- After loader.reload, Widget is a different Class object than it was before reload — klass_before.equal?(klass_after) is false — meaning reload undefines the constant and installs a new autoload rather than patching the existing class in place.
- klass_before.name == 'Widget' && klass_after.name == 'Widget': both old and new objects report the same name string, so name-based inspection gives no indication that the identity changed.
- instance.is_a?(Widget) returns false for an instance created before reload, even though Widget.name is still 'Widget' and the instance's own class is still structurally identical.
- instance.is_a?(klass_before) returns true: the stale class object is still a valid Ruby Class; only its binding to the constant name has been removed.
- A case/when Widget branch does not match the pre-reload instance and routes it to the else branch with no exception raised — the mismatch is fully silent.
파일
- Gemfile
- Gemfile.lock
- NOTES.md
- app/widget.rb
- csx.json
- test/contract.rb
검증된 아티팩트 내려받기 (tar.gz) — 컨트랙트가 실제로 실행된 바로 그 바이트
오리진 시더
검증 영수증
- ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-17 · ed25519:d91480838ac982c9