fix(test): deterministic async settle in metadata_fetch compare-rows Vitest (5s-timeout flake) (bookshelf-ora3c) #1333

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zombor merged 3 commits from bd-bookshelf-ora3c into main 2026-08-05 20:28:09 +00:00

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zombor commented 2026-08-04 20:32:23 +00:00

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Root cause

The _openModalWithDetail describe block in metadata_fetch_controller_compare_rows.test.js used fixed-count microtask drains (for (i < N) { await Promise.resolve(); }) to wait for async DOM updates. The counts were borderline: 8 ticks for a chain that needs at least 7, and the jsdom microtask scheduler interleaves MutationObserver callbacks (Stimulus controller connect/disconnect) non-deterministically under CI load. Any extra MO scheduling tick caused the test to check the DOM one tick too early, leaving it awaiting a promise chain that never progressed — tying up the full 5s Vitest default timeout before the test was killed.

The specific tests reported as failing:

• :2114 "renders the degrade note when detail response resolves with degrade_note"
• :1909 "renders the modal with enriched writer credits after fetch resolves"

Both are in the _openModalWithDetail describe block and share the same fragile pattern.

Fix

Replace all fixed microtask loops in the _openModalWithDetail block with vi.waitFor() that polls real DOM conditions:

• mountWithDetailUrl(): wait for fetchButton to become enabled (providers loaded + rendered) instead of draining 8 ticks.
• After click(fetchButton): new waitForCard() helper polls until .candidate-card appears.
• After click(card): new waitForModal() helper polls until .mf-modal-overlay:not(.mf-modal-overlay--loading) is in the DOM.

Loading-overlay tests (1954, 1995) that intentionally use a never-resolving detail fetch only use waitForCard() (not waitForModal()), preserving their existing synchronous loading-overlay check.

Test plan

• make js-test: 4610 tests pass (137 files)
• 100% JS coverage maintained (statements/branches/functions/lines)
• Specific file run 5× locally: stable across all runs

Closes bead bookshelf-ora3c on merge.

## Root cause The `_openModalWithDetail` describe block in `metadata_fetch_controller_compare_rows.test.js` used fixed-count microtask drains (`for (i < N) { await Promise.resolve(); }`) to wait for async DOM updates. The counts were borderline: 8 ticks for a chain that needs at least 7, and the jsdom microtask scheduler interleaves MutationObserver callbacks (Stimulus controller connect/disconnect) non-deterministically under CI load. Any extra MO scheduling tick caused the test to check the DOM one tick too early, leaving it awaiting a promise chain that never progressed — tying up the full 5s Vitest default timeout before the test was killed. The specific tests reported as failing: - `:2114` "renders the degrade note when detail response resolves with degrade_note" - `:1909` "renders the modal with enriched writer credits after fetch resolves" Both are in the `_openModalWithDetail` describe block and share the same fragile pattern. ## Fix Replace all fixed microtask loops in the `_openModalWithDetail` block with `vi.waitFor()` that polls real DOM conditions: - `mountWithDetailUrl()`: wait for `fetchButton` to become **enabled** (providers loaded + rendered) instead of draining 8 ticks. - After `click(fetchButton)`: new `waitForCard()` helper polls until `.candidate-card` appears. - After `click(card)`: new `waitForModal()` helper polls until `.mf-modal-overlay:not(.mf-modal-overlay--loading)` is in the DOM. Loading-overlay tests (1954, 1995) that intentionally use a never-resolving detail fetch only use `waitForCard()` (not `waitForModal()`), preserving their existing synchronous loading-overlay check. ## Test plan - `make js-test`: 4610 tests pass (137 files) - 100% JS coverage maintained (statements/branches/functions/lines) - Specific file run 5× locally: stable across all runs Closes bead bookshelf-ora3c on merge.

zombor added 1 commit 2026-08-04 20:32:24 +00:00

fix(test): deterministic async settle in metadata_fetch compare-rows Vitest (bookshelf-ora3c) ... fd6e6ae14a

Replace the fragile fixed-microtask-count loops (`for (i < N) await Promise.resolve()`)
in the _openModalWithDetail describe block with `vi.waitFor()` polling for real DOM
conditions:

- `mountWithDetailUrl`: replace 8-tick drain with `vi.waitFor` until fetchButton is
  enabled (providers loaded and rendered).
- After `click(fetchButton)`: replace 8-tick drain with `waitForCard()` helper that
  polls until `.candidate-card` appears in the results area.
- After `click(card)`: replace 16-tick drain with `waitForModal()` helper that polls
  until `.mf-modal-overlay:not(.mf-modal-overlay--loading)` is in the DOM.

Root cause: the jsdom microtask scheduler interleaves MutationObserver callbacks
(Stimulus controller connect) and Promise microtasks non-deterministically under CI
load. The fixed-count drain was borderline — 8 ticks for a 7-tick chain — and any
extra MO scheduling tick caused the condition check to run before the DOM was ready,
leaving the test awaiting a never-completing promise chain for 5s until Vitest killed
it. `vi.waitFor` polls the real settled condition with a 1000ms timeout and 50ms
interval, making the settle instant and deterministic regardless of MO interleaving.

Applies to all 11 tests in the _openModalWithDetail block (consistent fix); loading-
overlay tests that intentionally use a never-resolving detail fetch are handled by
only waiting for the card (not the modal) after fetch button click.

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

zombor added 1 commit 2026-08-04 20:49:46 +00:00

fix(test): deterministic vi.waitFor settle in 3 more flaky Vitest files (bookshelf-ora3c) ... 22414454ff

Same root cause as compare_rows fix: fixed-count Promise.resolve() microtask
drains are fragile because jsdom's MutationObserver callback scheduling is
non-deterministic under CI load. The three files that timed out in CI (5000ms)
on the same run:

- length_sweet_spot_controller.test.js: mountChart() awaited only 2 ticks;
  for non-empty points, now uses vi.waitFor(() => svg appeared); re-render
  test also switched to vi.waitFor().

- llm_provider_modal_controller.test.js: mountModal() awaited only 2 ticks;
  now uses vi.waitFor(() => getControllerForElementAndIdentifier != null),
  which is null until Stimulus fully connects the instance.

- metadata_fetch_controller_chip_fields.test.js: openModalForCandidate()
  used 8+4 tick drains; now uses vi.waitFor for card and modal appearance,
  matching the approach applied to compare_rows in the prior commit.

All 4610 JS unit tests pass. 100% coverage maintained.

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

zombor added 1 commit 2026-08-04 21:18:43 +00:00

fix(e2e): delete 3 screenshot-only browser journeys to fix E2E Browser timeout (bookshelf-ora3c) ... 1642769f1c

journey_oi1l2_screenshot_test.go — one-time screenshot helper (PR #1070), no
functional assertions worth keeping in the permanent suite.

journey_cover_card_series_test.go — screenshot capture for bookshelf-m3yzn, only
asserts element existence (already covered by the books-list journey) + takes a PNG.

journey_library_counts_sidebar_test.go — explicitly labelled "screenshot-only
journey" in its own file comment (bookshelf-t3z2w.4).

These 3 files add ~340 lines to the browser suite that run per Ginkgo proc,
pushing the 4-proc wall-clock time over the 10m Ginkgo --timeout on slow CI
runners. Removing them brings the suite back under budget (same fix as PR #1324
which passes E2E Browser in 6m22s vs 10m58s with these present).

This is consistent with bz643.1 (PR #1324) which also deletes these files as
part of the browser suite reduction epic.

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

zombor commented 2026-08-04 21:29:28 +00:00

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Security Review — bookshelf-ora3c / PR #1333

This PR is test-only: it replaces fixed-microtask-count polling (await Promise.resolve() loops) with vi.waitFor()-based deterministic settle in four Vitest files, and deletes three screenshot-only e2e/browser/ specs.

Diff surface

Vitest changes (4 files):

• static/js/test/length_sweet_spot_controller.test.js — replaces 2× await Promise.resolve() with vi.waitFor() polling on DOM artifact (SVG).
• static/js/test/llm_provider_modal_controller.test.js — same pattern; polls getControllerForElementAndIdentifier instead of fixed-tick drain.
• static/js/test/metadata_fetch_controller_chip_fields.test.js — replaces 8-tick and 4-tick drains with vi.waitFor() on .candidate-card and .mf-modal-overlay:not(.mf-modal-overlay--loading).
• static/js/test/metadata_fetch_controller_compare_rows.test.js — same replacement at ~15 call sites; introduces waitForCard() / waitForModal() helpers.

No production JS files are touched. No Go files are touched. No auth logic, permission gates, fetch validators, or CSP handlers are modified.

Browser e2e deletions (3 files):

• e2e/browser/journey_oi1l2_screenshot_test.go — screenshot-only: navigated to /account and /account/hardcover as the seeded stub user (user_id=1) and uploaded PNGs to a PR comment. No authz assertion; no cross-user check; no CSP probe. Authentication was supplied via setAuthCookies (session cookie for the single seeded user) — no login bypass.
• e2e/browser/journey_cover_card_series_test.go — screenshot-only: seeded two books in a fresh library, navigated to /books?view=grid&library_id=…, and verified presence/absence of .cover-card-series. No authz assertion; no ownership boundary test; no cross-user leak scenario.
• e2e/browser/journey_library_counts_sidebar_test.go — screenshot-only: seeded two libraries, navigated to /, waited for #sidebar-section-libraries-body in the DOM. No authz assertion; no CSP probe; no cross-user check. The PR comment block it deleted confirms: "The journey is not intended as a behavioural regression spec; the SSE controller logic is already covered by Vitest."

Security analysis

No security-relevant behavior is weakened or removed:

1. AuthZ / multi-user scoping: none of the deleted specs tested ownership, cross-user isolation, or RBAC. They were screenshot capture helpers whose only side-effect was uploading a PNG to Forgejo. Removing them does not reduce authz coverage.
2. CSP: none of the deleted specs contained a CSP audit (Page.enable-style DevTools check or assertion on Content-Security-Policy headers). The oi1l2 spec navigated the account page but made no assertion on CSP behavior.
3. Injection / SSRF: no fetch-URL validation or outbound-request gating was exercised in any deleted spec.
4. Secrets / PII: no tokens or sensitive values appear in the diff. The FORGEJO_TOKEN env var referenced in the deleted spec comments was read from the environment at runtime and never committed.
5. Vitest vi.waitFor usage: the new polling helpers wait on DOM state produced by the controller under test; they do not alter what the controller does, only how the test waits for it. No security assertion is relaxed or removed — the same .candidate-card, .mf-modal-overlay, and svg assertions remain.
6. No production code touched: all changes are confined to static/js/test/ and e2e/browser/.

Nil security surface confirmed.

REVIEW VERDICT: 0 blocker, 0 major, 0 minor

## Security Review — bookshelf-ora3c / PR #1333 This PR is test-only: it replaces fixed-microtask-count polling (`await Promise.resolve()` loops) with `vi.waitFor()`-based deterministic settle in four Vitest files, and deletes three screenshot-only `e2e/browser/` specs. ### Diff surface **Vitest changes (4 files):** - `static/js/test/length_sweet_spot_controller.test.js` — replaces 2× `await Promise.resolve()` with `vi.waitFor()` polling on DOM artifact (SVG). - `static/js/test/llm_provider_modal_controller.test.js` — same pattern; polls `getControllerForElementAndIdentifier` instead of fixed-tick drain. - `static/js/test/metadata_fetch_controller_chip_fields.test.js` — replaces 8-tick and 4-tick drains with `vi.waitFor()` on `.candidate-card` and `.mf-modal-overlay:not(.mf-modal-overlay--loading)`. - `static/js/test/metadata_fetch_controller_compare_rows.test.js` — same replacement at ~15 call sites; introduces `waitForCard()` / `waitForModal()` helpers. No production JS files are touched. No Go files are touched. No auth logic, permission gates, fetch validators, or CSP handlers are modified. **Browser e2e deletions (3 files):** - `e2e/browser/journey_oi1l2_screenshot_test.go` — screenshot-only: navigated to `/account` and `/account/hardcover` as the seeded stub user (user_id=1) and uploaded PNGs to a PR comment. No authz assertion; no cross-user check; no CSP probe. Authentication was supplied via `setAuthCookies` (session cookie for the single seeded user) — no login bypass. - `e2e/browser/journey_cover_card_series_test.go` — screenshot-only: seeded two books in a fresh library, navigated to `/books?view=grid&library_id=…`, and verified presence/absence of `.cover-card-series`. No authz assertion; no ownership boundary test; no cross-user leak scenario. - `e2e/browser/journey_library_counts_sidebar_test.go` — screenshot-only: seeded two libraries, navigated to `/`, waited for `#sidebar-section-libraries-body` in the DOM. No authz assertion; no CSP probe; no cross-user check. The PR comment block it deleted confirms: "The journey is not intended as a behavioural regression spec; the SSE controller logic is already covered by Vitest." ### Security analysis No security-relevant behavior is weakened or removed: 1. **AuthZ / multi-user scoping:** none of the deleted specs tested ownership, cross-user isolation, or RBAC. They were screenshot capture helpers whose only side-effect was uploading a PNG to Forgejo. Removing them does not reduce authz coverage. 2. **CSP:** none of the deleted specs contained a CSP audit (`Page.enable`-style DevTools check or assertion on `Content-Security-Policy` headers). The oi1l2 spec navigated the account page but made no assertion on CSP behavior. 3. **Injection / SSRF:** no fetch-URL validation or outbound-request gating was exercised in any deleted spec. 4. **Secrets / PII:** no tokens or sensitive values appear in the diff. The `FORGEJO_TOKEN` env var referenced in the deleted spec comments was read from the environment at runtime and never committed. 5. **Vitest `vi.waitFor` usage:** the new polling helpers wait on DOM state produced by the controller under test; they do not alter what the controller does, only how the test waits for it. No security assertion is relaxed or removed — the same `.candidate-card`, `.mf-modal-overlay`, and `svg` assertions remain. 6. **No production code touched:** all changes are confined to `static/js/test/` and `e2e/browser/`. Nil security surface confirmed. REVIEW VERDICT: 0 blocker, 0 major, 0 minor

zombor commented 2026-08-04 21:32:00 +00:00

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Code Review — bookshelf-ora3c (PR #1333)

Phase 1: Spec Compliance

Bead scope: fix Vitest 5-second-timeout flakes in 4 JS test files by replacing fixed microtask-drain counts with vi.waitFor polling. Secondary in-scope item from the dispatch: the 3 browser spec deletions.

All 4 JS files are converted. The browser spec deletions are present and are the coordination concern flagged below.

---

Phase 2: Code Quality Findings

[MINOR] static/js/test/metadata_fetch_controller_chip_fields.test.js:148 — vi.waitFor inside vi.useFakeTimers() context; interaction not documented
The beforeEach in this file calls vi.useFakeTimers(). The two vi.waitFor calls in openModalForCandidate (lines 148 and 155) do not pass an explicit timeout option, relying on the Vitest default of 1000ms. This is safe: Vitest's vi.waitFor calls getSafeTimers() (real timers) and calls vi.advanceTimersByTime(interval) on each poll when fake timers are active (verified in node_modules/vitest/dist/chunks/test.DNmyFkvJ.js). No deadlock risk. However, the interaction is non-obvious — the next engineer reading this will not know without digging. Suggested fix: add a brief comment above each vi.waitFor in openModalForCandidate noting that vi.waitFor internally advances fake timers and is safe here, or pass an explicit { timeout: 2000 } to make the intent visible.

[MINOR] static/js/test/length_sweet_spot_controller.test.js:43 — empty-points fallback still uses fixed Promise.resolve() drain
The mountChart function converts non-empty points to vi.waitFor(() => el.querySelector('svg')) (correct), but for the empty-points path (points.length === 0) it retains two Promise.resolve() drains as a fallback. The comment acknowledges: "no DOM artifact to poll." Logically sound — when points is empty, connect()→_render() returns immediately without building any DOM node, so there is nothing deterministic to poll. The assertion is querySelector('svg') === null, which would produce a false-pass (not a flaky fail) if the controller had not yet connected, so the flake risk is one-directional and low. Suggested fix: have connect() set a sentinel attribute (e.g. data-connected="true") synchronously, and poll for that attribute instead of the SVG — this eliminates the last fragile drain in the file without requiring production code changes beyond a single this.element.setAttribute(...) line.

[MINOR] e2e/browser/journey_cover_card_series_test.go, e2e/browser/journey_library_counts_sidebar_test.go — deleted without replacement in this PR; replacement lives in unmerged PR #1324
This PR deletes two browser specs that contain genuine behavioral assertions: journey_cover_card_series_test.go asserts both positive and negative cover-card-series label cases; journey_library_counts_sidebar_test.go asserts #sidebar-section-libraries-body is in the DOM. PR #1324 (bookshelf-bz643.1) replaces both with equivalent API e2e assertions in journey_11_reader_html_structure_test.go — but #1324 is not yet merged (state: open, merged: false). If this PR lands before #1324 there is a window where these assertions are unrepresented in CI. The journey_oi1l2_screenshot_test.go deletion is safe — that was a one-time screenshot helper for PR #1070 (already merged) with no ongoing behavioral assertions.
Recommended fix: remove the 3 browser file deletions from this PR entirely (scope creep; this PR is a JS flake fix). Let #1324 own the deletions and their replacements as a coordinated pair. Alternatively, merge #1324 first, then rebase this PR — the deletions become true no-ops.

---

Summary

The core fix is sound: replacing fixed microtask-drain loops with vi.waitFor polling real settled DOM conditions is the correct approach. The vi.waitFor implementation handles fake timers correctly (internally uses real timers + advanceTimersByTime). waitForModal correctly targets .mf-modal-overlay:not(.mf-modal-overlay--loading). waitForCard returns the element enabling callers to chain click(card) without a second query. No new coverage exclusions, no golangci changes, no workflow command-sequence changes, e2e-policy-check unaffected.

REVIEW VERDICT: 0 blocker, 0 major, 3 minor

## Code Review — bookshelf-ora3c (PR #1333) ### Phase 1: Spec Compliance Bead scope: fix Vitest 5-second-timeout flakes in 4 JS test files by replacing fixed microtask-drain counts with `vi.waitFor` polling. Secondary in-scope item from the dispatch: the 3 browser spec deletions. All 4 JS files are converted. The browser spec deletions are present and are the coordination concern flagged below. --- ### Phase 2: Code Quality Findings [MINOR] static/js/test/metadata_fetch_controller_chip_fields.test.js:148 — `vi.waitFor` inside `vi.useFakeTimers()` context; interaction not documented The `beforeEach` in this file calls `vi.useFakeTimers()`. The two `vi.waitFor` calls in `openModalForCandidate` (lines 148 and 155) do not pass an explicit `timeout` option, relying on the Vitest default of 1000ms. This is safe: Vitest's `vi.waitFor` calls `getSafeTimers()` (real timers) and calls `vi.advanceTimersByTime(interval)` on each poll when fake timers are active (verified in `node_modules/vitest/dist/chunks/test.DNmyFkvJ.js`). No deadlock risk. However, the interaction is non-obvious — the next engineer reading this will not know without digging. Suggested fix: add a brief comment above each `vi.waitFor` in `openModalForCandidate` noting that `vi.waitFor` internally advances fake timers and is safe here, or pass an explicit `{ timeout: 2000 }` to make the intent visible. [MINOR] static/js/test/length_sweet_spot_controller.test.js:43 — empty-points fallback still uses fixed `Promise.resolve()` drain The `mountChart` function converts non-empty points to `vi.waitFor(() => el.querySelector('svg'))` (correct), but for the empty-points path (`points.length === 0`) it retains two `Promise.resolve()` drains as a fallback. The comment acknowledges: "no DOM artifact to poll." Logically sound — when points is empty, `connect()→_render()` returns immediately without building any DOM node, so there is nothing deterministic to poll. The assertion is `querySelector('svg') === null`, which would produce a false-pass (not a flaky fail) if the controller had not yet connected, so the flake risk is one-directional and low. Suggested fix: have `connect()` set a sentinel attribute (e.g. `data-connected="true"`) synchronously, and poll for that attribute instead of the SVG — this eliminates the last fragile drain in the file without requiring production code changes beyond a single `this.element.setAttribute(...)` line. [MINOR] e2e/browser/journey_cover_card_series_test.go, e2e/browser/journey_library_counts_sidebar_test.go — deleted without replacement in this PR; replacement lives in unmerged PR #1324 This PR deletes two browser specs that contain genuine behavioral assertions: `journey_cover_card_series_test.go` asserts both positive and negative cover-card-series label cases; `journey_library_counts_sidebar_test.go` asserts `#sidebar-section-libraries-body` is in the DOM. PR #1324 (bookshelf-bz643.1) replaces both with equivalent API e2e assertions in `journey_11_reader_html_structure_test.go` — but #1324 is not yet merged (state: open, merged: false). If this PR lands before #1324 there is a window where these assertions are unrepresented in CI. The `journey_oi1l2_screenshot_test.go` deletion is safe — that was a one-time screenshot helper for PR #1070 (already merged) with no ongoing behavioral assertions. Recommended fix: remove the 3 browser file deletions from this PR entirely (scope creep; this PR is a JS flake fix). Let #1324 own the deletions and their replacements as a coordinated pair. Alternatively, merge #1324 first, then rebase this PR — the deletions become true no-ops. --- ### Summary The core fix is sound: replacing fixed microtask-drain loops with `vi.waitFor` polling real settled DOM conditions is the correct approach. The `vi.waitFor` implementation handles fake timers correctly (internally uses real timers + `advanceTimersByTime`). `waitForModal` correctly targets `.mf-modal-overlay:not(.mf-modal-overlay--loading)`. `waitForCard` returns the element enabling callers to chain `click(card)` without a second query. No new coverage exclusions, no golangci changes, no workflow command-sequence changes, e2e-policy-check unaffected. REVIEW VERDICT: 0 blocker, 0 major, 3 minor

zombor force-pushed bd-bookshelf-ora3c from 1642769f1c to aa04745786 2026-08-05 15:06:44 +00:00 Compare

zombor force-pushed bd-bookshelf-ora3c from aa04745786 to c7455ba2fe 2026-08-05 20:21:45 +00:00 Compare

zombor merged commit 0a18271af3 into main 2026-08-05 20:28:09 +00:00

zombor referenced this pull request from a commit 2026-08-05 20:28:12 +00:00

Merge pull request 'fix(test): deterministic async settle in metadata_fetch compare-rows Vitest (5s-timeout flake) (bookshelf-ora3c)' (#1333) from bd-bookshelf-ora3c into main

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