- useOnboardingChecklist.wiring.test.ts: a data event, then a route
change 100 ms later, still gets its deferred re-read (two LOAD_START).
Pins the follower's deps: with `pathname` among them, the cleanup drops
the pending timer and the test goes red (mutation M1 of the review). The
comment that claimed "one subscription only" now points to this test.
- hookHarness.test.ts: a dependency array that shrinks, or grows by
`undefined`, recomputes the memo (mutation M8, length branch of
depsChanged).
- NOT SIMULATED, in hookHarness.ts and docs/architecture.md: the dispatch
of a useReducer keeps the reducer of the first render, where React
applies the latest one.
Refs #409
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
src/test/hookHarness.ts gives the tests that call hooks and components as
plain functions one fake React with React's semantics: state initialized
once with stable setters, the reducer applied with a dispatch spy, refs kept,
memos and callbacks recomputed only on a changed dependency, effects run by
commit() only when a dependency changed (cleanups first), and every hook it
does not cover throws instead of reaching the real React. Each semantic is
proved by hookHarness.test.ts, which also checks that the module imports
React only as a type.
Refs #409
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
