open-design/apps/web/tests/utils
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fix(web): prune draft tokens when the plugin chip strip clears (#2881) (#3356)
ChatComposer tracks the `@…` tokens this surface authored via the
@-mention popover plugin-pick path. When PluginsSection's chip strip
clears, we wire its `onCleared` and prune *only* those tracked
insertions from the draft so the textarea no longer holds orphaned
styled mentions whose chips just unmounted.

Architecture summary (rounds 1–9 collapsed; round 10 detailed below):

  - `Array<{token, start, pluginId, insertionId?}>` tracking with
    start offsets reconciled across each keystroke via an LCS+LCP
    edit-range diff in
    `apps/web/src/utils/pluginInsertionTracking.ts` (round 3-4).
    `insertionId` is forwarded by `reconcileInsertions` so the
    producer can locate its own entry across reconciles
    (round 10).
  - All draft mutations route through a single `updateDraft`
    chokepoint that runs `reconcileInsertions` outside the
    `setDraft` updater so React StrictMode's double-invoke is
    harmless (round 4-5).
  - Boundaries delegate to the shared
    `inlineMentions.isMentionBoundary` /
    `inlineMentions.isMentionRightBoundary` helpers so the
    tracker can never diverge from the parser (round 5).
  - `setActivePlugin` is a chokepoint for every applyById path,
    filtering tracked entries to those matching the new active
    plugin so a replace-plugin flow can never let stale entries
    survive (round 6).
  - Picker rollback double-snapshots draft + tracker so apply-
    failure restores the tracker but only rewrites the draft
    when no user keystrokes arrived during the await
    (round 7-8).
  - `stripPluginInsertedTokens` collapses whitespace seam-local
    so user-authored multi-space spans elsewhere are preserved
    (round 8).
  - `setActivePlugin` is deferred past `await applyById` on
    every path, and `onCleared` filters by
    `pluginsSectionRef.current?.getActiveRecord()?.id` so a
    pending-window clear scopes to the actually-mounted
    plugin's tokens (round 9).

race in the picker rollback:

  Round 9 made `onCleared` mutate the tracker and the draft when
  it ran during a pending replace, and added the `getActiveRecord`
  filter so the strip targets the still-mounted plugin's entries
  only. The picker's failure-path rollback, however, still
  restored `prevEntries` / `prevActiveId` wholesale — assuming
  nothing else had touched the tracker during the await. If the
  user clicked the still-mounted original chip's × during the
  pending replace AND the deferred `applyById` then resolved
  with a 500, the wholesale restore (a) resurrected entries that
  `onCleared` had legitimately stripped (now stale offsets) and
  (b) left the optimistic `@<target>` orphaned in the draft with
  no chip ever having mounted — the original #2881 symptom
  recurring inside the failure window.

  Fix splits the failure rollback into two paths:

  1. **Detect "intervening clear" via `activePluginIdRef.current
     === null && prevActiveId !== null`.** `onCleared` always
     nulls the active id as its last action; our deferred
     `setActivePlugin` never ran in the failure branch. So the
     null-while-prev-not-null state is the smoking gun for an
     intervening clear during the await.

  2. **On detection, surgically remove only our optimistic
     entry and only its `@<target>`.** Locate the entry by
     `insertionId` (added to `TrackedInsertion` as an optional
     field, forwarded by `reconcileInsertions` so the id
     survives offset shifts) — this disambiguates the case
     where the user picked the same plugin from the @-popover
     more than once during the await window. Splice that entry
     out and run `updateDraft((d) => stripPluginInsertedTokens(
     d, [ourEntry]))` so the draft loses `@<target>` and any
     remaining tracked entries (the in-flight target would have
     no others, but a co-pending second pick could) get their
     offsets reconciled. `activePluginIdRef` stays at `null` —
     `onCleared`'s truth, since no chip is mounted.

  The "no intervening clear" branch is the round 7/8 path:
  restore `prevEntries`/`prevActiveId` wholesale and rewrite
  the draft only if `draftRef.current === postInsertDraft`
  (no user keystrokes during the await).

Regression coverage (additions):

  - `apps/web/tests/components/ChatComposer.plugin-clear-prunes-draft.test.tsx`
    — 18 integration specs total (17 prior + 1 new round-10):
    * `@-popover pick A → @-popover pick B (apply pending) →
      clear A's chip → resolve B with 500 → assert no orphan
      @<target>, no orphan @A, no chip mounted, no stale
      tracker entries`. Uses a deferred `Promise<Response>` so
      the apply stays in flight while the chip-clear is fired,
      then resolves with a 500 to drive the failure path. Pre-
      fix this would resurrect Airbnb's stale entry AND leave
      `@SecondPlugin` orphaned in the draft.

PluginsSection.tsx is unchanged. The host-local tracking +
draft-update chokepoint + parser-aligned boundaries + deferred
active-plugin scoping + transactional applyById + intervening-
clear-aware rollback + filtered `onCleared` keep the cross-
component contract identical to main — only ChatComposer touches
behavior, plus the utils module and two `inlineMentions` exports.

Validation:
  - pnpm exec vitest run tests/utils/pluginInsertionTracking.test.ts → 36/36 passed
  - pnpm exec vitest run tests/components/ChatComposer.plugin-clear-prunes-draft.test.tsx → 18/18 passed
  - pnpm exec vitest run -c vitest.config.ts (full apps/web suite, 228 files) → 2202/2202 passed
  - pnpm --filter @open-design/web typecheck → green
  - pnpm guard → green
2026-05-30 17:16:24 +00:00
..
apiProtocol.test.ts feat[qoder cli] add Qoder CLI agent support (#626) 2026-05-06 19:54:03 +08:00
chatTime.test.ts chore: enforce test directory conventions (#496) 2026-05-05 15:34:22 +08:00
fileSystemErrors.test.ts fix(web): handle dropped file read failures (#2858) 2026-05-25 06:05:17 +00:00
notifications.test.ts chore: enforce test directory conventions (#496) 2026-05-05 15:34:22 +08:00
pluginInsertionTracking.test.ts fix(web): prune draft tokens when the plugin chip strip clears (#2881) (#3356) 2026-05-30 17:16:24 +00:00
projectName.test.ts [codex] Add pet task center and desktop pet (#1833) 2026-05-19 15:38:39 +08:00
uuid.test.ts fix(web): unbreak Create button on plain HTTP / LAN-IP deployments (#849) (#900) 2026-05-08 16:50:59 +08:00