tests(11): make uploadModal-reset zombie-callback test deterministic (correct mock boundary)

The "guard against zombie callbacks" subtest passed its asserts but leaked async
activity after the test ended (node:test flags that as failure). Root cause: it
mocked modal.generateTorrentMetadata / resolveUploadIdentifier, but
handleVideoSelection drives the upload through this.mediaUploader.uploadVideo —
a DIFFERENT object with its own helpers — so the mediaUploader still ran real
createTorrentMetadata()/hashing on a synthetic {name:"video.mp4"} file ("invalid
input type" async) and captureVideoMetadata() ran URL.createObjectURL(file)
("must be an instance of Blob"). Not intermittent — a consistent wrong-boundary mock.

Fix: mock at the real DI boundary — modal.mediaUploader.uploadVideo = () =>
delayedUpload (controllable pending promise) — and stub captureVideoMetadata.
Hermetic, deterministic (3/3 exit 0, # pass 3). Mutation-verified: breaking the
videoUploadId zombie guard makes the test fail. Production code untouched. See
TEST_INTEGRITY.md.

NOTE: the runner is fail-fast, so the full suite surfaces pre-existing failures one
at a time. tests/unit/hashChangeHandler.test.mjs is next (consistent AssertionError
on "loads default view if hash is empty" — likely the same stale-default bug the
sibling tests/app/hash-change-handler.test.mjs already had when TRENDING became the
logged-out default). Enumerating full scope next.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

TEST_INTEGRITY.md

@@ -510,6 +510,46 @@ test_integrity_note:
     if_true_explain_spec_basis: ""
 ```
 
+## 2026-07-05 — todo-11: uploadModal-reset zombie-callback test made deterministic (correct mock boundary)
+
+```yaml
+test_integrity_note:
+  change_type: ["flake_fix", "refactor_tests"]
+  scenarios:
+    - id: SCN-upload-zombie-callback-guard
+      given: "An upload is in progress (videoUploadState.status === 'uploading') via a controllable pending mediaUploader.uploadVideo"
+      when: "resetUploads() runs mid-upload (bumping videoUploadId), then the in-flight upload later resolves (a 'zombie' completion)"
+      then: "The stale completion is ignored — status stays 'idle' and results.videoUrl stays '' — because handleVideoSelection guards on videoUploadId !== currentUploadId"
+  observable_outcomes:
+    - "videoUploadState.status: 'uploading' after start, 'idle' after reset, still 'idle' after the zombie resolve"
+    - "results.videoUrl.value === '' after the zombie resolve"
+    - "test exits 0 with no async-after-test activity (was leaking webtorrent/Blob errors)"
+  determinism_controls:
+    - "mediaUploader.uploadVideo replaced with a manually-resolved promise; captureVideoMetadata stubbed; jsdom DOM; no webtorrent, no network, no real Blob ops"
+  anti_cheat_rationale:
+    prevents:
+      - "over-mocking internal logic"
+      - "retry/sleep-based flake masking"
+    note: |
+      FLAKE_FIX + REFACTOR_TESTS, no assertion weakened. The subtest PASSED its asserts but
+      leaked async activity after the test ended, which node:test flags as a failure. Root
+      cause: it mocked modal.generateTorrentMetadata / resolveUploadIdentifier, but
+      handleVideoSelection drives the upload through this.mediaUploader.uploadVideo — a
+      DIFFERENT object with its OWN helpers — so the mediaUploader still ran real
+      createTorrentMetadata()/hashing on a synthetic {name:'video.mp4'} file ("invalid input
+      type" async), and captureVideoMetadata() ran URL.createObjectURL(file) ("must be an
+      instance of Blob"). Fixed by mocking at the correct DI boundary
+      (modal.mediaUploader.uploadVideo returns the controllable pending promise) and stubbing
+      captureVideoMetadata. The unit under test is the modal's videoUploadId zombie-guard, so
+      mocking the uploader boundary is correct isolation, not over-mocking (real upload/torrent
+      paths are covered by the mediaUploader / s3-upload suites).
+  mutation_verification:
+    - "Broke the guard (`if (this.videoUploadId !== currentUploadId) return` → `if (false)`) → the test FAILS ('State should remain idle after zombie completion', # fail 1). Reverted."
+  relaxation:
+    did_relax_any_assertion: false
+    if_true_explain_spec_basis: ""
+```
+
 ## 2026-07-05 — todo-11b: un-quarantine dm-block-filter (hermetic subscription; no force-exit)
 
 ```yaml

tests/ui/uploadModal-reset.test.mjs

@@ -151,17 +151,9 @@ describe("UploadModal Reset Logic", () => {
       let resolveUpload;
       const delayedUpload = new Promise(r => { resolveUpload = r; });
 
-      const slowR2Service = {
-          prepareUpload: async () => ({
-               settings: {},
-               bucketEntry: { bucket: 'test', publicBaseUrl: 'https://test.com' }
-          }),
-          uploadFile: () => delayedUpload // Return promise that waits
-      };
-
       const modal = new UploadModal({
           storageService: mockStorageService,
-          r2Service: slowR2Service,
+          r2Service: mockR2Service,
           getCurrentPubkey: () => "pk1",
           removeTrackingScripts: () => {},
           setGlobalModalState: () => {},
@@ -175,9 +167,19 @@ describe("UploadModal Reset Logic", () => {
       modal.activeProvider = "cloudflare_r2";
       modal.activeCredentials = { accountId: 'acc', accessKeyId: 'key', secretAccessKey: 'sec' };
 
-      // Mock generateTorrentMetadata BEFORE calling handleVideoSelection
-      modal.generateTorrentMetadata = async () => ({ hasValidInfoHash: false });
-      modal.resolveUploadIdentifier = async () => "mock-identifier";
+      // handleVideoSelection() drives the upload through this.mediaUploader.uploadVideo
+      // — NOT the modal's own generate/resolve helpers — so mock at THAT boundary.
+      // Returning the controllable pending promise lets us reset mid-upload and then
+      // release a "zombie" completion. This isolates the unit under test (the modal's
+      // videoUploadId versioning guard) from real webtorrent/S3, which is what the
+      // test intends. Previously the test mocked modal.generateTorrentMetadata /
+      // resolveUploadIdentifier (the wrong object), so the mediaUploader still ran
+      // real createTorrentMetadata()/hashing on a synthetic file — throwing "invalid
+      // input type" as async activity after the test ended.
+      modal.mediaUploader.uploadVideo = () => delayedUpload;
+      // captureVideoMetadata() does URL.createObjectURL(file), which needs a real
+      // Blob; stub it so the synthetic file below doesn't throw an async Blob error.
+      modal.captureVideoMetadata = async () => {};
 
       // Start upload
       const file = { name: "video.mp4" };

todo/TODO_2026-06-20_pre-launch.md

@@ -1241,10 +1241,20 @@ Reported 2026-06-25. Relates to #17 (NIP-71 interop) / the bitvid→NIP-71 mirro
       local patch is guesswork — the update is the honest fix.
 
 ### 11. Harden flaky tests (CI gate reliability)
-- [ ] `tests/ui/uploadModal-reset.test.mjs` ("UploadModal Reset Logic") intermittently
-      hangs/cancels (jsdom/webtorrent async-hang flake; documented in KNOWN_ISSUES,
-      reproduced on pre-refactor `1b11cb1b`). Make it deterministic so it can be a
-      trusted release gate. Audit e2e parallel-load flakiness too.
+- [x] `tests/ui/uploadModal-reset.test.mjs` ("UploadModal Reset Logic") — FIXED 2026-07-05.
+      The "guard against zombie callbacks" subtest mocked `modal.generateTorrentMetadata` /
+      `resolveUploadIdentifier`, but handleVideoSelection drives the upload through
+      `this.mediaUploader.uploadVideo` (a DIFFERENT object with its own helpers) — so the
+      mediaUploader still ran real `createTorrentMetadata()`/hashing on a synthetic
+      `{name:"video.mp4"}` file, throwing "invalid input type" as async activity AFTER the
+      test ended (node:test flags that as an uncaughtException) plus
+      `captureVideoMetadata()` calling `URL.createObjectURL(file)` → "must be an instance of
+      Blob". Not intermittent anymore — it was a consistent, wrong-boundary mock. Fix: mock
+      at the real DI boundary — `modal.mediaUploader.uploadVideo = () => delayedUpload` (the
+      controllable pending promise) + stub `modal.captureVideoMetadata`. Now hermetic, no
+      webtorrent/Blob, deterministic (3/3 exit 0, # pass 3). Mutation-verified: breaking the
+      videoUploadId zombie guard makes the test fail (# fail 1). See TEST_INTEGRITY.md.
+- [ ] Audit e2e parallel-load flakiness too.
 
 ### 11b. SILENTLY-EXCLUDED unit tests — 20 files never run in CI (found 2026-06-23)
 > **2026-07-03 addendum — stale-default failure was hiding in local runs:**