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FN-5728: fake-timer store-watcher polling tests

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Speed up store-watcher polling coverage by replacing real-time waits with deterministic fake-timer advancement.

- Apply Vitest fake timers to watch-active polling tests in store-watcher coverage.
- Advance timers explicitly around polling cycles and task creation to avoid interval-based delays.
- Ensure watcher teardown restores real timers and stops polling cleanly.
- Update FN-5048 speed audit notes with the fake-timer rewrite details and new runtime sample.

Files changed:
 docs/test-speed-audit-FN-5048.md                  |  4 ++--
 packages/core/src/__tests__/store-watcher.test.ts | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

Fusion-Task-Id: FN-5728

Fusion-Task-Lineage: 7cc1eed6-fe86-458d-94c3-8d0780ff7828
This commit is contained in:
gsxdsm
2026-05-30 12:58:47 -07:00
parent 15bc51a47e
commit 5ff7f37c24
2 changed files with 21 additions and 2 deletions
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4
docs/test-speed-audit-FN-5048.md
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@@ -31,7 +31,7 @@
| 3 | `src/__tests__/db.test.ts` | 5.64s | Database (~68%) | keep | Keep (real SQLite backstop). |
| 4 | `src/__tests__/test-project.test.ts` | 5.13s | test-project fixture (100%) | rewrite | Evaluate fixture-heavy setup duplication, trim low-value cases. |
| 5 | `src/__tests__/plugin-loader.test.ts` | 3.48s | PluginLoader (100%) | keep | Keep. |
| 6 | `src/__tests__/store-watcher.test.ts` | 2.77s | TaskStore (100%) | rewrite | Replace slow polling waits with fake timers. |
| 6 | `src/__tests__/store-watcher.test.ts` | 1.80s | TaskStore (100%) | rewrite | Replaced slow watch polling waits with FN-2707 fake-timer recipe. |
| 7 | `src/__tests__/run-audit.test.ts` | 2.60s | Run Audit (100%) | keep | Keep. |
| 8 | `src/__tests__/store-comments.test.ts` | 2.58s | TaskStore (100%) | keep | Keep. |
| 9 | `src/__tests__/plugin-store.test.ts` | 2.48s | PluginStore (100%) | keep | Keep. |
@@ -99,7 +99,7 @@
- `@fusion/dashboard`: **335.40s** (`vitest run` failed with broad pre-existing suite issues unrelated to FN-5048 edits)
### Targeted outcome checks for FN-5048 edits
- `packages/core/src/__tests__/store-watcher.test.ts` (`rewrite`): reverted to per-test harness (`createTaskStoreTestHarness`) after measuring shared-harness regression for watcher-focused assertions; core suite total improved vs baseline.
- `packages/core/src/__tests__/store-watcher.test.ts` (`rewrite`): retained per-test harness and fake-timerized watch-active polling tests (`vi.useFakeTimers` before `watch`, `advanceTimersByTimeAsync` driving cycles); sampled isolated file runtime now ~1.8s total with watch-active cases no longer incurring 1–3s interval waits.
- `packages/cli/src/__tests__/bin.test.ts` (`rewrite`/`trim`): redundant route permutations consolidated with `it.each`; CLI suite passes.
- `AGENTS.md` standing rule added and cross-linked from this audit to prevent reintroduction of slow-test patterns.