diff --git a/package.json b/package.json
index 4b6128ab2..6773a62b7 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
"ci:build": "yarn build:types && yarn build all && yarn build:i18n && yarn build:ts && yarn build:docs && yarn test:imports",
"test:imports": "node --test test/esm.test.js test/i18n.test.js test/ssr.test.js",
"typecheck": "node scripts/typecheck.mjs",
- "test:unit": "node --test test/thumbnail-emitter.test.js test/thumbnail-runtime.test.js test/thumbnail-vendor.test.js test/thumbnail-lifecycle.test.js test/thumbnail-input.test.js test/thumbnail.test.js test/iframe-navigation.test.js test/iframe-boundaries.test.js test/iframe-lifecycle.test.js test/iframe.test.js test/mediabunny.test.js test/mediabunny-shim.test.js test/mediabunny-coordination.test.js test/mediabunny-video.test.js test/mediabunny-audio.test.js test/mediabunny-hls.test.js test/mediabunny-entry.test.js test/mediabunny-capability.test.js test/mediabunny-load.test.js test/mediabunny-input.test.js test/dpip.test.js test/dpip-lifecycle.test.js test/canvas.test.js test/canvas-lifecycle.test.js test/ambilight.test.js test/ambilight-lifecycle.test.js test/ambilight-proxy.test.js test/vast.test.js test/vast-lifecycle.test.js test/ads.test.js test/ads-lifecycle.test.js test/playback.test.js test/dash-control.test.js test/dash-contract.test.js test/dash-lifecycle.test.js test/dash-events.test.js test/hls-control.test.js test/audio-track.test.js test/public-behavior.test.js test/helpers.test.js test/chapter.test.js test/utils.test.js test/resource-scope.test.js test/instance-lifecycle.test.js test/options.test.js test/media-hosts.test.js test/plugins.test.js test/source.test.js test/playback-properties.test.js test/media-events.test.js test/template-resources.test.js test/core-vendor.test.js test/component-resources.test.js test/setting-model.test.js test/setting-layout.test.js test/setting-resources.test.js test/subtitle.test.js test/display-native.test.js test/display-video-fullscreen.test.js test/display-pip.test.js test/display-mini.test.js test/display-sizing.test.js test/display-orientation.test.js test/hotkey.test.js test/listener-registry.test.js test/global-events.test.js test/pointer-events.test.js test/gesture.test.js test/event-scheduling.test.js test/notice.test.js test/fast-forward.test.js test/auto-playback.test.js test/builtin-layers.test.js test/prompt-components.test.js test/screenshot.test.js test/thumbnails.test.js test/progress.test.js test/environment.test.js test/storage.test.js test/facade-properties.test.js test/dom-boundaries.test.js test/initialization.test.js test/entry.test.js test/accessibility-button.test.js test/accessibility-focus.test.js test/accessibility-slider.test.js",
+ "test:unit": "node --test test/auto-thumbnail.test.js test/thumbnail-emitter.test.js test/thumbnail-runtime.test.js test/thumbnail-vendor.test.js test/thumbnail-lifecycle.test.js test/thumbnail-input.test.js test/thumbnail.test.js test/iframe-navigation.test.js test/iframe-boundaries.test.js test/iframe-lifecycle.test.js test/iframe.test.js test/mediabunny.test.js test/mediabunny-shim.test.js test/mediabunny-coordination.test.js test/mediabunny-video.test.js test/mediabunny-audio.test.js test/mediabunny-hls.test.js test/mediabunny-entry.test.js test/mediabunny-capability.test.js test/mediabunny-load.test.js test/mediabunny-input.test.js test/dpip.test.js test/dpip-lifecycle.test.js test/canvas.test.js test/canvas-lifecycle.test.js test/ambilight.test.js test/ambilight-lifecycle.test.js test/ambilight-proxy.test.js test/vast.test.js test/vast-lifecycle.test.js test/ads.test.js test/ads-lifecycle.test.js test/playback.test.js test/dash-control.test.js test/dash-contract.test.js test/dash-lifecycle.test.js test/dash-events.test.js test/hls-control.test.js test/audio-track.test.js test/public-behavior.test.js test/helpers.test.js test/chapter.test.js test/utils.test.js test/resource-scope.test.js test/instance-lifecycle.test.js test/options.test.js test/media-hosts.test.js test/plugins.test.js test/source.test.js test/playback-properties.test.js test/media-events.test.js test/template-resources.test.js test/core-vendor.test.js test/component-resources.test.js test/setting-model.test.js test/setting-layout.test.js test/setting-resources.test.js test/subtitle.test.js test/display-native.test.js test/display-video-fullscreen.test.js test/display-pip.test.js test/display-mini.test.js test/display-sizing.test.js test/display-orientation.test.js test/hotkey.test.js test/listener-registry.test.js test/global-events.test.js test/pointer-events.test.js test/gesture.test.js test/event-scheduling.test.js test/notice.test.js test/fast-forward.test.js test/auto-playback.test.js test/builtin-layers.test.js test/prompt-components.test.js test/screenshot.test.js test/thumbnails.test.js test/progress.test.js test/environment.test.js test/storage.test.js test/facade-properties.test.js test/dom-boundaries.test.js test/initialization.test.js test/entry.test.js test/accessibility-button.test.js test/accessibility-focus.test.js test/accessibility-slider.test.js",
"test:coverage": "node --test test/coverage.test.js && node scripts/coverage.mjs",
"test": "yarn test:node && yarn test:baseline",
"test:browser": "playwright test",
@@ -84,7 +84,8 @@
"test:iframe": "node --test test/iframe-navigation.test.js test/iframe-boundaries.test.js test/iframe.test.js test/iframe-lifecycle.test.js refactor/scripts/iframe-contract.test.mjs refactor/scripts/iframe-types.test.mjs",
"test:iframe-types-package": "node refactor/scripts/iframe-package-types.mjs",
"test:thumbnail": "node --test test/thumbnail-emitter.test.js test/thumbnail-runtime.test.js test/thumbnail-vendor.test.js test/thumbnail-lifecycle.test.js test/thumbnail-input.test.js test/thumbnail.test.js refactor/scripts/thumbnail-contract.test.mjs refactor/scripts/thumbnail-types.test.mjs",
- "test:thumbnail-types-package": "node refactor/scripts/thumbnail-package-types.mjs"
+ "test:thumbnail-types-package": "node refactor/scripts/thumbnail-package-types.mjs",
+ "test:auto-thumbnail": "node --test test/auto-thumbnail.test.js refactor/scripts/auto-thumbnail-contract.test.mjs"
},
"browserslist": "last 1 Chrome version",
"devDependencies": {
diff --git a/refactor/baselines/auto-thumbnail-failures-validation.json b/refactor/baselines/auto-thumbnail-failures-validation.json
new file mode 100644
index 000000000..840134b6d
--- /dev/null
+++ b/refactor/baselines/auto-thumbnail-failures-validation.json
@@ -0,0 +1,1947 @@
+{
+ "schemaVersion": 1,
+ "task": "PKG-AUTO-THUMB-02",
+ "status": "done",
+ "parentCommit": "cdc252b158af25836e7f0a5c07de78ee57eb0cf4",
+ "checks": [
+ {
+ "command": "node --test test/auto-thumbnail.test.js",
+ "result": "pass",
+ "tests": 64,
+ "scope": "Eight historical failure behaviors across eight frozen implementations; defects are reproduced, not fixed.",
+ "log": "refactor/.cache/auto-thumbnail02-unit.log"
+ },
+ {
+ "command": "yarn test:browser test/browser/auto-thumbnail.spec.js",
+ "result": "pass",
+ "tests": 9,
+ "retries": 0,
+ "skipped": 0,
+ "report": "refactor/.cache/auto-thumbnail02-browser-verified.json",
+ "results": "refactor/.cache/auto-thumbnail02-browser-verified-results",
+ "reportSha256": "e38a4478260d922d70389801ae230e6d5c30e439d108baeb8825a6ab3611b744"
+ },
+ {
+ "command": "yarn ci:check",
+ "result": "pass",
+ "tests": {
+ "unit": 1520,
+ "engineering": 14,
+ "baseline": 232,
+ "total": 1766
+ },
+ "strictProductionTypeScriptFiles": 339,
+ "log": "refactor/.cache/auto-thumbnail02-ci.log",
+ "logSha256": "f531bdcf2b73f49c81e994c3913ce340e3599620b91281a32feb6127a9749dec",
+ "warnings": [
+ "Existing generated core editor declaration unused eslint suppression",
+ "Existing Yarn DEP0169 url.parse warning"
+ ]
+ },
+ {
+ "command": "focused eslint --no-fix; yarn test:browser test/browser/auto-thumbnail.spec.js",
+ "result": "pass",
+ "tests": 9,
+ "retries": 0,
+ "skipped": 0,
+ "report": "refactor/.cache/auto-thumbnail02-browser-portable.json",
+ "reportSha256": "c48b511f69f0bad94956ff81de83a16a5d0dda17072775aa95ff7335a72b90c4",
+ "results": "refactor/.cache/auto-thumbnail02-browser-portable-results",
+ "scope": "Final platform assertion guard and all-cell color check verified after full CI. Production sources, package scripts and Node tests did not change after full CI; Linux hosted execution is not claimed."
+ },
+ {
+ "command": "yarn test:auto-thumbnail",
+ "result": "pass",
+ "tests": 102,
+ "log": "refactor/.cache/auto-thumbnail02-combined.log"
+ }
+ ],
+ "diagnosticRuns": [
+ {
+ "report": "refactor/.cache/auto-thumbnail02-browser-initial.json",
+ "results": "refactor/.cache/auto-thumbnail02-browser-initial-results",
+ "expected": 6,
+ "unexpected": 3,
+ "note": "Intermediate WebKit pixel hypothesis was tested and refined using independent native controls; not silently discarded."
+ },
+ {
+ "report": "refactor/.cache/auto-thumbnail02-browser-control.json",
+ "results": "refactor/.cache/auto-thumbnail02-browser-control-results",
+ "expected": 6,
+ "unexpected": 3,
+ "note": "Intermediate WebKit pixel hypothesis was tested and refined using independent native controls; not silently discarded."
+ },
+ {
+ "report": "refactor/.cache/auto-thumbnail02-browser-played-control.json",
+ "results": "refactor/.cache/auto-thumbnail02-browser-played-control-results",
+ "expected": 6,
+ "unexpected": 3,
+ "note": "Intermediate WebKit pixel hypothesis was tested and refined using independent native controls; not silently discarded."
+ }
+ ],
+ "measurements": [
+ {
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+ ],
+ "outstandingAfterDestroy": 1,
+ "goodRevoked": true,
+ "staleUrlLive": true,
+ "result": {
+ "name": "artplayerPluginAutoThumbnail"
+ },
+ "videoState": {
+ "src": "/test/pattern.mp4",
+ "readyState": 4,
+ "width": 320,
+ "seekHandler": "function",
+ "metadataHandler": "function"
+ }
+ },
+ {
+ "browser": "firefox",
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+ "implementation": "published-1.0.1-main",
+ "sha256": "3d9756b7437f24372d34138002b46937bb09e7392b82fb1caf5f09460f151c46",
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+ "blanks": {
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+ {
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+ }
+ ],
+ "outstandingAfterDestroy": 1,
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+ "staleUrlLive": true,
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+ },
+ "videoState": {
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+ "width": 320,
+ "seekHandler": "function",
+ "metadataHandler": "function"
+ }
+ },
+ {
+ "browser": "firefox",
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+ "implementation": "frozen-workspace-js",
+ "sha256": "ce1f1472bf02b836dd85b92eadf2f00786c02cde11a20ac2801136a0f675d12a",
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+ "width": 800,
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+ ],
+ "updates": [
+ {
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+ "scale": 1,
+ "afterDestroy": false
+ },
+ {
+ "height": 45,
+ "column": 10,
+ "number": 4,
+ "width": 80,
+ "scale": 1,
+ "afterDestroy": true
+ }
+ ],
+ "outstandingAfterDestroy": 1,
+ "goodRevoked": true,
+ "staleUrlLive": true,
+ "result": {
+ "name": "artplayerPluginAutoThumbnail"
+ },
+ "videoState": {
+ "src": "/test/pattern.mp4",
+ "readyState": 4,
+ "width": 320,
+ "seekHandler": "function",
+ "metadataHandler": "function"
+ }
+ },
+ {
+ "browser": "webkit",
+ "browserVersion": "26.6",
+ "retry": 0,
+ "implementation": "published-1.1.0-main",
+ "sha256": "ce1f1472bf02b836dd85b92eadf2f00786c02cde11a20ac2801136a0f675d12a",
+ "scope": "Native HTTP video, seeking and JPEG pixels with controlled delivery of native toBlob results; player-facing host is a stub, not a core integration result.",
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+ "type": "image/jpeg"
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+ ],
+ "updates": [
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+ "scale": 1,
+ "afterDestroy": false
+ },
+ {
+ "height": 45,
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+ "number": 4,
+ "width": 80,
+ "scale": 1,
+ "afterDestroy": true
+ }
+ ],
+ "outstandingAfterDestroy": 1,
+ "goodRevoked": true,
+ "staleUrlLive": true,
+ "result": {
+ "name": "artplayerPluginAutoThumbnail"
+ },
+ "videoState": {
+ "src": "/test/pattern.mp4",
+ "readyState": 4,
+ "width": 320,
+ "seekHandler": "function",
+ "metadataHandler": "function"
+ }
+ },
+ {
+ "browser": "webkit",
+ "browserVersion": "26.6",
+ "retry": 0,
+ "implementation": "published-1.0.1-main",
+ "sha256": "3d9756b7437f24372d34138002b46937bb09e7392b82fb1caf5f09460f151c46",
+ "scope": "Native HTTP video, seeking and JPEG pixels with controlled delivery of native toBlob results; player-facing host is a stub, not a core integration result.",
+ "blanks": {
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+ ]
+ ],
+ "type": "image/jpeg"
+ },
+ "final": {
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+ "height": 45,
+ "pixel": [
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+ ],
+ "samples": [
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+ ]
+ ],
+ "type": "image/jpeg"
+ },
+ "native": {
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+ "rawPixel": [
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+ ],
+ "width": 800,
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+ ],
+ "type": "image/jpeg"
+ },
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+ ],
+ "type": "image/jpeg"
+ },
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+ 6.0015607
+ ],
+ "updates": [
+ {
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+ "number": 4,
+ "width": 80,
+ "scale": 1,
+ "afterDestroy": false
+ },
+ {
+ "height": 45,
+ "column": 10,
+ "number": 4,
+ "width": 80,
+ "scale": 1,
+ "afterDestroy": true
+ }
+ ],
+ "outstandingAfterDestroy": 1,
+ "goodRevoked": true,
+ "staleUrlLive": true,
+ "result": {
+ "name": "artplayerPluginAutoThumbnail"
+ },
+ "videoState": {
+ "src": "/test/pattern.mp4",
+ "readyState": 4,
+ "width": 320,
+ "seekHandler": "function",
+ "metadataHandler": "function"
+ }
+ },
+ {
+ "browser": "webkit",
+ "browserVersion": "26.6",
+ "retry": 0,
+ "implementation": "frozen-workspace-js",
+ "sha256": "ce1f1472bf02b836dd85b92eadf2f00786c02cde11a20ac2801136a0f675d12a",
+ "scope": "Native HTTP video, seeking and JPEG pixels with controlled delivery of native toBlob results; player-facing host is a stub, not a core integration result.",
+ "blanks": {
+ "width": 800,
+ "height": 45,
+ "pixel": [
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+ 0,
+ 0,
+ 255
+ ],
+ "samples": [
+ [
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+ ],
+ [
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+ ],
+ [
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+ ],
+ [
+ 0,
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+ 0,
+ 255
+ ]
+ ],
+ "type": "image/jpeg"
+ },
+ "final": {
+ "width": 800,
+ "height": 45,
+ "pixel": [
+ 0,
+ 0,
+ 0,
+ 255
+ ],
+ "samples": [
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+ ],
+ [
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+ ],
+ [
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+ ],
+ [
+ 0,
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+ 255
+ ]
+ ],
+ "type": "image/jpeg"
+ },
+ "native": {
+ "readyState": 4,
+ "currentTime": 0.2557929,
+ "rawPixel": [
+ 16,
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+ 239,
+ 255
+ ],
+ "width": 800,
+ "height": 45,
+ "pixel": [
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+ ],
+ "samples": [
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+ ],
+ [
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+ ],
+ [
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+ ],
+ [
+ 0,
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+ ]
+ ],
+ "type": "image/jpeg"
+ },
+ "staticControl": {
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+ "height": 45,
+ "pixel": [
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+ 255
+ ],
+ "samples": [
+ [
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+ ],
+ [
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+ ],
+ [
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+ 255
+ ],
+ [
+ 0,
+ 0,
+ 0,
+ 255
+ ]
+ ],
+ "type": "image/jpeg"
+ },
+ "seeks": [
+ 0,
+ 0.0015887,
+ 4.0007806,
+ 6.001757
+ ],
+ "updates": [
+ {
+ "height": 45,
+ "column": 10,
+ "number": 4,
+ "width": 80,
+ "scale": 1,
+ "afterDestroy": false
+ },
+ {
+ "height": 45,
+ "column": 10,
+ "number": 4,
+ "width": 80,
+ "scale": 1,
+ "afterDestroy": true
+ }
+ ],
+ "outstandingAfterDestroy": 1,
+ "goodRevoked": true,
+ "staleUrlLive": true,
+ "result": {
+ "name": "artplayerPluginAutoThumbnail"
+ },
+ "videoState": {
+ "src": "/test/pattern.mp4",
+ "readyState": 4,
+ "width": 320,
+ "seekHandler": "function",
+ "metadataHandler": "function"
+ }
+ }
+ ],
+ "limitations": [
+ "Tests assert known historical defects, not successful candidate repair.",
+ "Browser player-facing host is a stub; actual core matrix/demo integration remains task05/06.",
+ "Windows WebKit black plugin samples coexist with colored played-video and static JPEG controls; this is not a waived capability.",
+ "Invalid numeric input, reentrancy, cross-instance and cleanup-failure candidate boundaries remain for task03.",
+ "No physical Safari, mobile, CORS matrix, arbitrary formats or sustained-load acceptance is claimed."
+ ],
+ "completedAt": "2026-09-12T22:04:39.411Z",
+ "inputs": [
+ {
+ "file": "package.json",
+ "sha256LF": "38c96d1cbfef31b38506465c71c06c3d8408ef8e48bf4cd7b3106fd112d9791f"
+ },
+ {
+ "file": "test/auto-thumbnail.test.js",
+ "sha256LF": "ce8ff64895b3e89648324ed5d9b16787ac397ed9f1076488361ab93e1b2681d9"
+ },
+ {
+ "file": "test/browser/auto-thumbnail.spec.js",
+ "sha256LF": "ec9fcbedc9ee12d61a82e2edff84f677d9474d38c111c7bd295bf880277ccc11"
+ },
+ {
+ "file": "test/helpers/auto-thumbnail.js",
+ "sha256LF": "6c4fb8a27d5495578fb18df813458b2cb1ae467f0a182de14d75b72f2f760c3a"
+ },
+ {
+ "file": "test/browser/media/pattern.mp4",
+ "sha256": "0ad1d7ad286aec6e0fa9e27fc1e487e7277df2e603e30040fb942365763d0233"
+ },
+ {
+ "file": "refactor/baselines/auto-thumbnail-failures.md",
+ "sha256LF": "2d7b49ba6711a6403a3e16011001019384cd54a4df3bcff08d51ba2fd57ab1de"
+ }
+ ],
+ "exploratoryReadinessProbes": [
+ {
+ "scope": "Exploratory conditions, includes unsupported and timeout outcomes; not counted as candidate acceptance.",
+ "source": "refactor/.cache/auto-thumbnail-readiness-initial.mjs",
+ "sourceSha256": "18ec3c5472d298c4bde1f0fc5e703a91d2028f1f8eed5cc45391c9d28d81c3e7",
+ "results": "refactor/.cache/auto-thumbnail-readiness-initial.json",
+ "resultsSha256": "0f77c28f7e60b07abde56ce29db597125ed1ed42dc34ef2e5000e30dfc7af43d"
+ },
+ {
+ "scope": "Exploratory conditions, includes unsupported and timeout outcomes; not counted as candidate acceptance.",
+ "source": "refactor/.cache/auto-thumbnail-readiness-probe.mjs",
+ "sourceSha256": "93cf64c7b1cbad915f5c70266f882ad7ad3e4b36aa21b2bc0f0b69d957e3141f",
+ "results": "refactor/.cache/auto-thumbnail-readiness-probe.json",
+ "resultsSha256": "bf8e252fddc77de84f54183d4329fe3b472c6d3ed62cce6957fcc14a3d6fc30a"
+ }
+ ],
+ "fullCiBrowserTestInput": {
+ "file": "test/browser/auto-thumbnail.spec.js",
+ "sha256LF": "5a8f20a77c145d534c624b23cb407bc6f50f21de365d9e5fb3c6e5bf0ba329c3"
+ }
+}
diff --git a/refactor/baselines/auto-thumbnail-failures.md b/refactor/baselines/auto-thumbnail-failures.md
new file mode 100644
index 000000000..49fd0b933
--- /dev/null
+++ b/refactor/baselines/auto-thumbnail-failures.md
@@ -0,0 +1,78 @@
+# Auto-thumbnail 失败与原生对照
+
+`PKG-AUTO-THUMB-02` 补64项旧行为回归,八份固定夹具各执行八类问题。
+配合01的38项正常/分发契约,成功、失败、切源和销毁有可重跑对照。
+这里测试通过意味着 **成功复现旧缺陷**,不是候选已经修复。
+生产源码和包版本本步仍未变化,下一步03负责模块和生命周期修复。
+
+## 受控故障
+
+| 情况 | 实际旧行为 | 03应建立的候选断言 |
+| --- | --- | --- |
+| destroy期间等待Blob | 迟到回调继续写thumbnails,最终URL存活,decoder src/handlers未清 | 取消后不写UI、不创建URL;清理decoder/监听器/本任务URL |
+| 切源后旧metadata迟到 | 旧width/旧源覆盖新结果,两个任务URL同时留存 | 代际检查覆盖metadata/seek/Blob,只有当前任务可发布 |
+| 重复metadata | 创建三个独立decoder和三个未释放URL | 新任务替换旧任务,并明确保留预览与释放的时机 |
+| 编码回调逆序到达 | 完整→空白→半成品倒退,每次撤销前一可用URL | 串行或按代际/序号提交可用帧,不能倒退 |
+| toBlob返回null | 先撤销可用URL,再抛错;核心配置仍指向已失效URL | 验证Blob后才替换;失败有归属并释放临时资源 |
+| drawImage/toBlob同步抛错 | 异常逃逸,decoder和回调未清 | 出错后停止任务,继续清理,即使个别清理动作再抛错 |
+| getContext为null/原生media error | 前者稍后在drawImage抛错,后者没有处理者 | 失败不能静默挂起,不能冒充可用输出 |
+| 核心thumbnails setter抛错 | 新URL泄漏,后续帧继续工作 | 保留错误身份、收回新URL、停止失效任务及迟到副作用 |
+
+这些测试控制的是事件/编码回调,媒体对象不是原生解码器。无效数值、重入、跨实例、
+监听器安装/清理失败还需03的候选测试补齐,不能从上述八类推断穷尽覆盖。
+01中的旧高度参数、异步注册、CJS形状与类型推导问题保持独立处理。
+
+## 三浏览器真实证据
+
+最终9项原生测试覆盖1.0.1 main、1.1.0 main和冻结工作区main,分别运行
+Chromium153.0.8010.12、Firefox155.0、Windows WebKit26.6,均无重试/跳过。
+使用真实HTTP `/test/pattern.mp4`、原生seek、canvas.toBlob JPEG编码、BlobURL及img.decode
+读取像素。仅 **延迟交付原生编码结果** 来确定性验证竞争,没有替换视频帧或Blob内容。
+核心一侧是最小宿主替身,故这不是05的新旧核心联调、8082示例或真实Safari验收。
+
+每项原生证据都记录:0/2/4/6秒附近四次seek,五份编码(第一份空白),最终拼图
+800×45,四个已填格子的采样点,完整/空白两份回调的交付顺序,destroy前后更新及
+URL存活状态。最终URL在destroy后仍存活,迟到空白回调仍写入并撤销前一份URL。
+测试结束由测试方清理decoder和URL,明确不是旧插件完成了清理。
+
+### WebKit黑色采样没有作为能力豁免
+
+首次运行6项通过、3项WebKit像素断言失败;后续独立loadeddata+两次动画帧对照显示,
+不播放就draw也可能黑色(包括Chromium对照)。这不足以认定平台不支持。
+再加入可见、静音的独立video,等待播放前进至少0.25秒后暂停和draw,三个浏览器
+均得到彩色原始像素及JPEG;红色静态canvas→JPEG也通过。
+
+WebKit旧插件仍在四个采样点得到黑色JPEG,原生播放对照的原始/编码像素均有颜色。
+因此登记`AUTO-THUMB-PIXEL-01`为**旧抽帧路径缺陷**,根因仍需03用解码/帧就绪证据细化。
+没有将它归为不可用或跳过,也没有把“返回了JPEG”当成抽帧成功;不以四个采样点
+声称整幅图每个像素都是黑色。Firefox/Chromium旧插件的四格均采到彩色像素。
+
+最终测试严格断言这些旧版差异以及原生阳性对照,不是删除像素断言来通过。
+三个中间诊断运行(各6通过/3失败)和完整最终9通过报告/附件均独立归档。
+未来候选须验证可用像素,不能继承历史黑色结果作为成功标准。
+Windows的黑色历史断言明确限制在win32/WebKit,不将该平台现象硬编码成所有系统的
+WebKit行为;其他系统接受有正常采样的输出,若仍黑则必须是WebKit并保留同一原生阳性
+对照。最后这项平台边界调整经过定向lint和整组9项原生重跑;Linux托管CI本步未执行。
+
+### 03前置实验线索(不是候选验收)
+
+另用独立本地HTTP/原生video探测DOM挂载、loadeddata、播放、帧回调和seek条件。
+Windows WebKit26.6的该运行没有requestVideoFrameCallback;脱离DOM的等待/播放
+仍产生透明原始像素,挂载后追加seek可出现有效像素。display:none仍透明;
+将video渲染为1×1会把正常蓝色采样变成灰色平均值,**不能以非黑判定内容正确**。
+visibility:hidden且保留正常尺寸的探测保留了正常采样颜色,可作为03验证方向。
+首次seek位置还有偏离目标的记录,需要验证精确帧条件,不能直接把实验代码作为实现。
+原始记录在`.cache/auto-thumbnail-readiness-initial.{mjs,json,log}`和
+`.cache/auto-thumbnail-readiness-probe.{mjs,json,log}`;实验有明确不支持/超时结果,
+不计入上面9项验收,也不据此关闭像素风险。
+
+## 执行与接续
+
+- `yarn test:auto-thumbnail`:64项旧失败对照+38项冻结契约。
+- `yarn test:browser test/browser/auto-thumbnail.spec.js`:9项固定历史原生对照。
+- Node64项纳入`test:unit`;基线38项由`test:baseline`继续执行。
+- 03按入口注册、任务/源所有权、抽帧/编码、错误清理拆分,并保留有效旧调用;
+ 新增的候选回归先在冻结旧版失败,再在源码/构建产物/原生浏览器通过。
+- 04迁严格TS与声明,05最终核心/真实设备,06实际tarball和完整demo,不合并冒充完成。
+
+详见[机器验证记录](auto-thumbnail-failures-validation.json)。本步不推送、不发布。
diff --git a/refactor/changes/2026-09-13-PKG-AUTO-THUMB-02-failures.md b/refactor/changes/2026-09-13-PKG-AUTO-THUMB-02-failures.md
new file mode 100644
index 000000000..7ac64343d
--- /dev/null
+++ b/refactor/changes/2026-09-13-PKG-AUTO-THUMB-02-failures.md
@@ -0,0 +1,23 @@
+# PKG-AUTO-THUMB-02 旧失败回归与原生像素
+
+在八份冻结夹具上增加64项失败行为对照,覆盖销毁/切源/重复metadata/逆序编码/
+null Blob/draw与encode异常/缺context与media错误/核心setter异常。
+保留01正常契约,根脚本新增test:auto-thumbnail并将64项纳入test:unit,无新依赖。
+
+新增9项三浏览器原生HTTP/video/seek/JPEG/URL/像素测试,手动延迟原生编码结果交付以
+确定性复现销毁后更新和逆序覆盖。没有将宿主替身包装成核心联调,原生媒体内容未伪造。
+WebKit首轮像素失败后增加四格采样、独立loadeddata、可见静音播放和静态红色JPEG对照。
+播放/静态阳性对照均成功,旧抽帧路径四点仍黑,故作为待修缺陷而不是能力豁免。
+诊断失败运行完整保留,最终历史断言9项通过并不代表候选已修复。
+
+AUTO-THUMB-LIFE-01和AUTO-THUMB-ENCODE-01从source-observed变为reproduced,
+新增AUTO-THUMB-PIXEL-01;均保持open。无效输入/重入/跨实例等候选边界继续03补齐。
+下一步修改生产源码并建立候选成功标准;04保留独立TS/类型工作。
+
+见[故障表](../baselines/auto-thumbnail-failures.md)及
+[验证](../baselines/auto-thumbnail-failures-validation.json)。
+回退此提交只移除本步测试/脚本/记录;生产代码、发布版本、dist均未变。独立本地提交,
+不推送、不发布。
+
+最终完整CI1766项(1520单元+14工程+232基线)、339生产TS检查通过;历史原生9项通过,
+没有重试/跳过/未处理浏览器错误。源码修复是独立03任务,不把历史缺陷复现记为修复完成。
diff --git a/refactor/plan.md b/refactor/plan.md
index bb4ef5c0b..a7643132a 100644
--- a/refactor/plan.md
+++ b/refactor/plan.md
@@ -4,7 +4,7 @@
基线:`40fcda6a37d0049d42e49c1e64e70d4fd9ba5f7f`。总任务 222 项,范围 22 个包及工作区/示例。
-状态:todo 98 / doing 11 / blocked 0 / done 113 / deferred 0。风险 L/M/H 表示兼容风险,不表示工期。
+状态:todo 97 / doing 11 / blocked 0 / done 114 / deferred 0。风险 L/M/H 表示兼容风险,不表示工期。
前置依赖是启动条件;验收是完成条件。任务可以继续拆分,但不能复用或悄悄删除旧 ID。
@@ -172,7 +172,7 @@
| ID | 范围 / 步骤 | 前置依赖 | 交付物 | 验收条件 | 风险 | 状态 |
| --- | --- | --- | --- | --- | --- | --- |
| PKG-AUTO-THUMB-01 | artplayer-plugin-auto-thumbnail
核对包契约与历史用法 | BASE-05 | url/width/number/scale、异步工厂和渐进缩略图更新 | 源码/声明/README/demo/发布包差异已登记;公开形状和版本范围冻结 | H | done |
-| PKG-AUTO-THUMB-02 | artplayer-plugin-auto-thumbnail
建立特有行为与错误测试 | PKG-AUTO-THUMB-01, ENG-03, ENG-05 | 抽帧边界、短视频、失败、连续来源和销毁中的抽帧 | 旧版本行为可重跑,成功/失败/切源/销毁有必要断言 | H | todo |
+| PKG-AUTO-THUMB-02 | artplayer-plugin-auto-thumbnail
建立特有行为与错误测试 | PKG-AUTO-THUMB-01, ENG-03, ENG-05 | 抽帧边界、短视频、失败、连续来源和销毁中的抽帧 | 旧版本行为可重跑,成功/失败/切源/销毁有必要断言 | H | done |
| PKG-AUTO-THUMB-03 | artplayer-plugin-auto-thumbnail
整理内部职责与资源 | PKG-AUTO-THUMB-02, CORE-09, CORE-19 | 隐藏 video、seek 队列、canvas 编码与 Blob URL 清理 | 结构变化和缺陷修复分开记录;原 API/事件/资源生命周期通过 | H | todo |
| PKG-AUTO-THUMB-04 | artplayer-plugin-auto-thumbnail
迁移自有源码和公开类型 | PKG-AUTO-THUMB-03, ENG-04, ENG-06, CORE-07 | 抽帧结果和真实异步插件返回类型兼容 | 严格类型检查、旧消费样例通过;声明路径/导出和同步异步兼容 | H | todo |
| PKG-AUTO-THUMB-05 | artplayer-plugin-auto-thumbnail
验证新旧核心和组合 | PKG-AUTO-THUMB-04, CORE-22 | 旧核心/候选核心预览、多次加载无过期缩略图覆盖 | 最终核心与原支持范围核心分别通过;设备/SDK 缺证据不能标完成 | H | todo |
@@ -495,6 +495,7 @@
- PKG-AUDIO-04: [记录](changes/2026-09-12-PKG-AUDIO-04-types.md) [记录](baselines/audio-types-validation.json)
- PKG-AUDIO-05: [记录](changes/2026-09-12-PKG-AUDIO-05-combinations.md) [记录](baselines/audio-combinations-first.json) [记录](baselines/audio-combinations-checkpoint.json) [记录](audio-validation.md)
- PKG-AUTO-THUMB-01: [记录](baselines/auto-thumbnail-release.json) [记录](baselines/auto-thumbnail-contract.md) [记录](changes/2026-09-13-PKG-AUTO-THUMB-01-contract.md) [记录](baselines/auto-thumbnail-contract-validation.json)
+- PKG-AUTO-THUMB-02: [记录](baselines/auto-thumbnail-failures.md) [记录](baselines/auto-thumbnail-failures-validation.json) [记录](changes/2026-09-13-PKG-AUTO-THUMB-02-failures.md)
- PKG-HLS-01: [记录](baselines/hls-control-contract.md) [记录](baselines/hls-control-release.json) [记录](changes/2026-09-11-PKG-HLS-01-contract.md)
- PKG-HLS-02: [记录](hls-validation.md) [记录](baselines/hls-sdk.json) [记录](baselines/hls-validation.json) [记录](changes/2026-09-11-PKG-HLS-02-tests.md)
- PKG-HLS-03: [记录](changes/2026-09-12-PKG-HLS-03-modules.md) [记录](baselines/hls-modules-validation.json) [记录](hls-validation.md)
diff --git a/refactor/progress.md b/refactor/progress.md
index 10c0a4245..0666437a2 100644
--- a/refactor/progress.md
+++ b/refactor/progress.md
@@ -1,5 +1,17 @@
# 进度与证据
+## PKG-AUTO-THUMB-02 完成:失败回归和原生抽帧对照
+
+64项旧行为测试覆盖8份冻结夹具的销毁/切源/重复metadata/逆序Blob/null Blob/
+draw与encode异常/缺context和media错误/setter异常。9项三浏览器原生HTTP/video/
+seek/JPEG/像素对照复现迟到更新;WebKit旧插件四点黑色,而播放及静态JPEG对照有色,
+登记为待修抽帧路径缺陷,不作为能力豁免。保留3次中间诊断失败报告和最终完整报告。
+完整CI1766项、339生产TS通过。新增test:auto-thumbnail,Node64项纳入test:unit。
+问题已复现并记录但源码尚未修复,03负责资源/抽帧重构;独立隐藏渲染实验仅作03线索。
+见[故障表](baselines/auto-thumbnail-failures.md)和[验证](baselines/auto-thumbnail-failures-validation.json)。
+222项:114 done、11 doing、97 todo;185风险,新增像素风险与已有相关风险均open。
+
+
## PKG-AUTO-THUMB-01 完成:自动缩略图发布与行为基线
核实全部三个npm版本及16成员,冻结8份工作区输入。明确1.0.0缺main/legacy,
diff --git a/refactor/risk-table.md b/refactor/risk-table.md
index 2e79823de..749f33a1e 100644
--- a/refactor/risk-table.md
+++ b/refactor/risk-table.md
@@ -186,5 +186,6 @@
| AUTO-THUMB-TYPE-01 | open / 已复现 | Published declarations misdescribe async registration and switch height/number option fields across generations | PKG-AUTO-THUMB-04 |
| AUTO-THUMB-EXPORT-01 | open / 已复现 | Published 1.0.1 CommonJS default namespace differs from the direct function exported by 1.1.0 | PKG-AUTO-THUMB-04, PKG-AUTO-THUMB-06 |
| AUTO-THUMB-DIST-01 | open / 已复现 | Published 1.0.0 archive lacks declared main and legacy runtimes | PKG-AUTO-THUMB-06 |
-| AUTO-THUMB-LIFE-01 | open / 源码/产物事实 | Extraction tasks, decoder handlers and final object URLs lack source-switch and destroy ownership | PKG-AUTO-THUMB-02, PKG-AUTO-THUMB-03, PKG-AUTO-THUMB-05 |
-| AUTO-THUMB-ENCODE-01 | open / 源码/产物事实 | Unserialized encodes include blank output and lack media/canvas/input failure handling | PKG-AUTO-THUMB-02, PKG-AUTO-THUMB-03, PKG-AUTO-THUMB-05 |
+| AUTO-THUMB-LIFE-01 | open / 已复现 | Extraction tasks, decoder handlers and final object URLs lack source-switch and destroy ownership | PKG-AUTO-THUMB-02, PKG-AUTO-THUMB-03, PKG-AUTO-THUMB-05 |
+| AUTO-THUMB-ENCODE-01 | open / 已复现 | Unserialized encodes include blank output and lack media/canvas/input failure handling | PKG-AUTO-THUMB-02, PKG-AUTO-THUMB-03, PKG-AUTO-THUMB-05 |
+| AUTO-THUMB-PIXEL-01 | open / 已复现 | Historical auto-thumbnail yields black sampled JPEG cells on Windows WebKit while played native video and static JPEG controls yield color | PKG-AUTO-THUMB-03, PKG-AUTO-THUMB-05 |
diff --git a/refactor/risks.json b/refactor/risks.json
index 34c255921..cb189145e 100644
--- a/refactor/risks.json
+++ b/refactor/risks.json
@@ -4051,7 +4051,7 @@
{
"id": "AUTO-THUMB-LIFE-01",
"title": "Extraction tasks, decoder handlers and final object URLs lack source-switch and destroy ownership",
- "confirmation": "source-observed",
+ "confirmation": "reproduced",
"status": "open",
"owners": [
"PKG-AUTO-THUMB-02",
@@ -4061,15 +4061,19 @@
"evidence": [
"refactor/baselines/auto-thumbnail-release.json",
"refactor/baselines/auto-thumbnail-contract.md",
- "refactor/scripts/auto-thumbnail-contract.test.mjs"
+ "refactor/scripts/auto-thumbnail-contract.test.mjs",
+ "test/auto-thumbnail.test.js",
+ "refactor/baselines/auto-thumbnail-failures.md",
+ "refactor/baselines/auto-thumbnail-failures-validation.json"
],
"compatibleResolution": "Cancel obsolete work and release owned resources while retaining live options and progressive usable sheet updates.",
- "closureCriteria": "Delayed callbacks, repeated metadata, switching, destroy, multiple instances and failure cleanup are reproduced then pass source/artifacts and native browser checks."
+ "closureCriteria": "Delayed callbacks, repeated metadata, switching, destroy, multiple instances and failure cleanup are reproduced then pass source/artifacts and native browser checks.",
+ "workspaceState": "Task02 reproduces old failures with 64 controlled tests and native delayed JPEG callbacks. Candidate fixes, numeric validation, reentrancy and complete cleanup boundaries remain task03; status stays open."
},
{
"id": "AUTO-THUMB-ENCODE-01",
"title": "Unserialized encodes include blank output and lack media/canvas/input failure handling",
- "confirmation": "source-observed",
+ "confirmation": "reproduced",
"status": "open",
"owners": [
"PKG-AUTO-THUMB-02",
@@ -4079,10 +4083,31 @@
"evidence": [
"refactor/baselines/auto-thumbnail-release.json",
"refactor/baselines/auto-thumbnail-contract.md",
- "refactor/scripts/auto-thumbnail-contract.test.mjs"
+ "refactor/scripts/auto-thumbnail-contract.test.mjs",
+ "test/auto-thumbnail.test.js",
+ "refactor/baselines/auto-thumbnail-failures.md",
+ "refactor/baselines/auto-thumbnail-failures-validation.json"
],
"compatibleResolution": "Preserve JPEG grid/time/scale while bounding jobs, sequencing valid updates and handling null Blob, invalid media and thrown callbacks.",
- "closureCriteria": "Fault controls and native valid/corrupt media prove no stale sheet replacement, leaked URLs or unhandled async callbacks; capability limitations remain explicit."
+ "closureCriteria": "Fault controls and native valid/corrupt media prove no stale sheet replacement, leaked URLs or unhandled async callbacks; capability limitations remain explicit.",
+ "workspaceState": "Task02 reproduces old failures with 64 controlled tests and native delayed JPEG callbacks. Candidate fixes, numeric validation, reentrancy and complete cleanup boundaries remain task03; status stays open."
+ },
+ {
+ "id": "AUTO-THUMB-PIXEL-01",
+ "title": "Historical auto-thumbnail yields black sampled JPEG cells on Windows WebKit while played native video and static JPEG controls yield color",
+ "confirmation": "reproduced",
+ "status": "open",
+ "owners": [
+ "PKG-AUTO-THUMB-03",
+ "PKG-AUTO-THUMB-05"
+ ],
+ "evidence": [
+ "test/browser/auto-thumbnail.spec.js",
+ "refactor/baselines/auto-thumbnail-failures.md",
+ "refactor/baselines/auto-thumbnail-failures-validation.json"
+ ],
+ "compatibleResolution": "Establish actual decoded-frame readiness for the existing timeline/grid and preserve silent independent extraction; do not waive colored pixel checks as unsupported media.",
+ "closureCriteria": "Candidate source and artifacts generate usable sampled pixels on native browser controls with lifecycle checks; supported Safari and core combinations remain explicit final gates."
}
]
}
diff --git a/refactor/tasks.json b/refactor/tasks.json
index 8b89f74d6..294621054 100644
--- a/refactor/tasks.json
+++ b/refactor/tasks.json
@@ -1755,11 +1755,15 @@
"ENG-03",
"ENG-05"
],
- "status": "todo",
+ "status": "done",
"risk": "H",
"deliverable": "抽帧边界、短视频、失败、连续来源和销毁中的抽帧",
"acceptance": "旧版本行为可重跑,成功/失败/切源/销毁有必要断言",
- "evidence": []
+ "evidence": [
+ "baselines/auto-thumbnail-failures.md",
+ "baselines/auto-thumbnail-failures-validation.json",
+ "changes/2026-09-13-PKG-AUTO-THUMB-02-failures.md"
+ ]
},
{
"id": "PKG-AUTO-THUMB-03",
diff --git a/test/auto-thumbnail.test.js b/test/auto-thumbnail.test.js
new file mode 100644
index 000000000..16bce303d
--- /dev/null
+++ b/test/auto-thumbnail.test.js
@@ -0,0 +1,140 @@
+import assert from 'node:assert/strict'
+// eslint-disable-next-line test/no-import-node-test -- Frozen historical regressions use the repository Node runner.
+import test from 'node:test'
+import { autoThumbnailEnvironment, autoThumbnailHistorical } from './helpers/auto-thumbnail.js'
+
+for (const implementation of await autoThumbnailHistorical()) {
+ test(`Auto-thumbnail ${implementation.name} historical: destroy leaves pending encode and final URL alive`, async () => {
+ const env = autoThumbnailEnvironment(implementation)
+ await env.factory({ number: 2 })(env.art)
+ env.art.emit('video:loadedmetadata')
+ env.metadata()
+ const video = env.videos[0]
+ env.art.emit('destroy')
+ env.finish()
+ assert.equal(env.updates.length, 1)
+ assert.equal(env.urls.size, 1)
+ assert.equal(env.listeners.get('video:loadedmetadata').size, 1)
+ assert.equal(typeof video.onloadedmetadata, 'function')
+ assert.equal(typeof video.onseeked, 'function')
+ assert.equal(video.src, 'original.mp4')
+ assert.equal(env.operations.filter(item => item.name === 'pause' || item.name === 'load').length, 0)
+ env.art.emit('destroy')
+ assert.equal(env.urls.size, 1)
+ })
+
+ test(`Auto-thumbnail ${implementation.name} historical: delayed old metadata overwrites a newer source sheet`, async () => {
+ const env = autoThumbnailEnvironment(implementation)
+ const options = { number: 2, width: 80 }
+ await env.factory(options)(env.art)
+ env.art.emit('video:loadedmetadata')
+ const oldVideo = env.videos[0]
+ env.art.option.url = 'replacement.mp4'
+ options.width = 160
+ env.art.emit('restart')
+ env.art.emit('video:loadedmetadata')
+ env.metadata(env.videos[1])
+ env.finish(0, { source: 'new' })
+ assert.equal(env.updates.at(-1).width, 160)
+ env.metadata(oldVideo)
+ env.finish(1, { source: 'old' })
+ assert.equal(env.updates.at(-1).width, 80)
+ assert.equal(env.urls.get(env.updates.at(-1).url).source, 'old')
+ assert.equal(env.urls.size, 2, 'Separate jobs never revoke each other or release the latest stale sheet')
+ })
+
+ test(`Auto-thumbnail ${implementation.name} historical: repeated metadata opens independent decoders without closing previous jobs`, async () => {
+ const env = autoThumbnailEnvironment(implementation)
+ await env.factory({ number: 1 })(env.art)
+ for (let index = 0; index < 3; index++) {
+ env.art.emit('video:loadedmetadata')
+ env.metadata()
+ env.finish(index)
+ }
+ assert.equal(env.videos.length, 3)
+ assert.equal(env.urls.size, 3)
+ assert.equal(env.operations.some(item => item.name === 'pause' || item.name === 'load'), false)
+ assert.equal(env.videos.every(video => typeof video.onseeked === 'function'), true)
+ })
+
+ test(`Auto-thumbnail ${implementation.name} historical: reverse Blob delivery replaces a complete sheet with its initial blank snapshot`, async () => {
+ const env = autoThumbnailEnvironment(implementation)
+ await env.factory({ number: 2 })(env.art)
+ env.art.emit('video:loadedmetadata')
+ env.metadata()
+ env.seeked()
+ env.seeked()
+ assert.equal(env.blobs.length, 3, 'All native encodes can be pending together')
+ env.finish(2, { frames: 2 })
+ const completed = env.updates.at(-1).url
+ env.finish(0, { frames: 0 })
+ assert.equal(env.urls.has(completed), false)
+ assert.equal(env.urls.get(env.updates.at(-1).url).frames, 0)
+ env.finish(1, { frames: 1 })
+ assert.equal(env.urls.get(env.updates.at(-1).url).frames, 1)
+ })
+
+ test(`Auto-thumbnail ${implementation.name} historical: null Blob revokes the previous usable URL before throwing`, async () => {
+ const env = autoThumbnailEnvironment(implementation)
+ await env.factory({ number: 2 })(env.art)
+ env.art.emit('video:loadedmetadata')
+ env.metadata()
+ env.finish()
+ const sheet = env.art.thumbnails
+ env.seeked()
+ assert.throws(() => env.finish(1, null), /Blob required/)
+ assert.equal(env.urls.has(sheet.url), false)
+ assert.equal(env.art.thumbnails, sheet, 'Public state still references the revoked URL')
+ assert.equal(typeof env.videos[0].onseeked, 'function')
+ })
+
+ test(`Auto-thumbnail ${implementation.name} historical: draw and encode exceptions escape and retain decoder callbacks`, async () => {
+ for (const phase of ['draw', 'encode']) {
+ const env = autoThumbnailEnvironment(implementation)
+ const failure = new Error(`${phase} failed`)
+ await env.factory({ number: 2 })(env.art)
+ env.art.emit('video:loadedmetadata')
+ if (phase === 'draw') {
+ env.metadata()
+ env.controls.drawError = failure
+ assert.throws(() => env.seeked(), error => error === failure)
+ }
+ else {
+ env.controls.encodeError = failure
+ assert.throws(() => env.metadata(), error => error === failure)
+ }
+ assert.equal(typeof env.videos[0].onloadedmetadata, 'function')
+ assert.equal(env.videos[0].src, 'original.mp4')
+ assert.equal(env.operations.some(item => item.name === 'pause' || item.name === 'load'), false)
+ }
+ })
+
+ test(`Auto-thumbnail ${implementation.name} historical: missing context and native media errors have no failure owner`, async () => {
+ const env = autoThumbnailEnvironment(implementation)
+ await env.factory({ number: 2 })(env.art)
+ env.art.emit('video:loadedmetadata')
+ env.controls.nullContext = true
+ env.metadata()
+ assert.throws(() => env.seeked(), /drawImage/)
+ assert.equal(env.videos[0].onerror, null)
+ assert.equal(env.operations.some(item => item.name === 'pause' || item.name === 'load'), false)
+ })
+
+ test(`Auto-thumbnail ${implementation.name} historical: thumbnail setter failure leaks the new URL and does not cancel later work`, async () => {
+ const env = autoThumbnailEnvironment(implementation)
+ const failure = new Error('thumbnail setter failed')
+ await env.factory({ number: 2 })(env.art)
+ env.art.emit('video:loadedmetadata')
+ env.metadata()
+ env.controls.updateError = failure
+ assert.throws(() => env.finish(), error => error === failure)
+ assert.equal(env.urls.size, 1)
+ assert.equal(env.updates.length, 0)
+ env.controls.updateError = null
+ env.seeked()
+ env.finish(1)
+ assert.equal(env.updates.length, 1)
+ env.art.emit('destroy')
+ assert.equal(env.urls.size, 1)
+ })
+}
diff --git a/test/browser/auto-thumbnail.spec.js b/test/browser/auto-thumbnail.spec.js
new file mode 100644
index 000000000..e04b28773
--- /dev/null
+++ b/test/browser/auto-thumbnail.spec.js
@@ -0,0 +1,195 @@
+import process from 'node:process'
+import { hash } from '../../refactor/scripts/releases.mjs'
+import { autoThumbnailHistorical } from '../helpers/auto-thumbnail.js'
+import { expect, test } from './fixtures.js'
+
+const implementations = (await autoThumbnailHistorical()).filter(item => ['published-1.0.1-main', 'published-1.1.0-main', 'frozen-workspace-js'].includes(item.name))
+
+for (const implementation of implementations) {
+ test(`Auto-thumbnail ${implementation.name}: native JPEG callbacks outlive destroy and can restore the blank sheet`, async ({ page, browserName }, testInfo) => {
+ await page.goto('/test/player.html?core=published')
+ await page.setContent('