[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10,"_11":12},"actionData","errors","root",{"_228":-5,"_231":232,"_233":234},"routes/shell",{"_40":41,"_227":-5,"_228":-5,"_229":230},"routes/repo",{"_33":-7,"_34":35,"_36":37,"_38":39,"_40":41,"_42":31,"_43":31,"_44":31,"_45":31,"_46":31,"_47":31,"_48":49,"_50":49,"_51":31,"_52":-7,"_53":-7,"_54":55,"_56":57,"_58":59,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68},"routes/repo.blob",{"_13":14,"_15":16,"_17":18,"_19":20,"_21":14,"_22":23,"_24":-5,"_25":26,"_27":28,"_28":29,"_30":31,"_32":14},"ref","7c690cbcfdf23f1e1925f493bd4e10949afcb76d","path","e2e/responsive-content.e2e.ts","oid","0f2288ecd5d6a236fdbde6c1354af685776c39b2","size",24188,"commit","mounts",[],"source","plain",{"_13":14,"_15":16},"kind","text","import { content, expect, test } from \"./room\";\nimport { readDocument } from \"./database\";\nimport { expectFocusIndicator } from \"./focus\";\nimport * as Room from \"../apps/server/src/plan/room\";\nimport {\n\texpectNoHorizontalOverflow,\n\tRESPONSIVE_IMAGE_URL,\n\tRESPONSIVE_SOURCE,\n\tRESPONSIVE_VIEWPORTS,\n} from \"./responsive\";\n\nimport type { Plan } from \"../packages/protocol/index\";\nimport type { Page } from \"@playwright/test\";\n\nasync function routeResponsiveImage(page: Page): Promise {\n\tawait page.route(RESPONSIVE_IMAGE_URL, route =>\n\t\troute.fulfill({\n\t\t\tbody:\n\t\t\t\t``,\n\t\t\tcontentType: \"image/svg+xml\",\n\t\t}));\n}\n\nasync function injectAgentChange(\n\tpage: Page,\n\tcheckpoint: { epoch: string; source: string; update: Uint8Array },\n) {\n\tlet send: ((frame: Plan.Changes) => void) | undefined;\n\tawait page.routeWebSocket(\"**/ws?**\", route => {\n\t\tlet server = route.connectToServer();\n\t\tsend = frame => route.send(JSON.stringify(frame));\n\t\troute.onMessage(message => server.send(message));\n\t\tserver.onMessage(message => route.send(message));\n\t});\n\n\treturn {\n\t\tasync addedAtEnd() {\n\t\t\tlet document = await Room.restore(\n\t\t\t\tcheckpoint.epoch,\n\t\t\t\tcheckpoint.update,\n\t\t\t\tcheckpoint.source,\n\t\t\t\t[],\n\t\t\t);\n\t\t\ttry {\n\t\t\t\tlet digests = Room.digests(document);\n\t\t\t\tlet index = digests.length - 1;\n\t\t\t\tsend?.({\n\t\t\t\t\tkind: \"plan:changes\",\n\t\t\t\t\tts: 0,\n\t\t\t\t\tepoch: checkpoint.epoch,\n\t\t\t\t\tchanges: [{\n\t\t\t\t\t\tkind: \"added\",\n\t\t\t\t\t\tat: Room.anchorAt(document, index, digests[index]!),\n\t\t\t\t\t\tpreview:\n\t\t\t\t\t\t\t\"AgentChangeExcerptThatIsDeliberatelyLongEnoughToRequireTheChangeListToScrollOrTruncateInsideItsOwnContainedChrome\",\n\t\t\t\t\t\ttype: \"paragraph\",\n\t\t\t\t\t}],\n\t\t\t\t});\n\t\t\t} finally {\n\t\t\t\tdocument.doc.destroy();\n\t\t\t}\n\t\t},\n\t};\n}\n\nasync function expectInsideDocumentWidth(\n\tname: string,\n\tsurface: ReturnType,\n): Promise {\n\tawait expect.poll(() => surface.count(), { message: `${name} must be rendered` }).toBeGreaterThan(\n\t\t0,\n\t);\n\tawait expect.poll(async () =>\n\t\tawait surface.evaluateAll(nodes => {\n\t\t\tlet documentBox = globalThis.document.querySelector(\"[data-plan-scroll]\")\n\t\t\t\t?.getBoundingClientRect();\n\t\t\tif (!documentBox) return [{ reason: \"missing document\" }];\n\t\t\treturn nodes.flatMap(node => {\n\t\t\t\tlet element = node as HTMLElement;\n\t\t\t\tlet rectangle = element.getBoundingClientRect();\n\t\t\t\tlet bounds = {\n\t\t\t\t\tdocument: { left: documentBox.left, right: documentBox.right },\n\t\t\t\t\tleft: rectangle.left,\n\t\t\t\t\tright: rectangle.right,\n\t\t\t\t};\n\t\t\t\tif (!element.checkVisibility() || rectangle.width === 0 || rectangle.height === 0) {\n\t\t\t\t\treturn [{ ...bounds, reason: \"not visible\" }];\n\t\t\t\t}\n\t\t\t\treturn rectangle.left >= documentBox.left && rectangle.right <= documentBox.right\n\t\t\t\t\t? []\n\t\t\t\t\t: [{ ...bounds, reason: \"outside document\" }];\n\t\t\t});\n\t\t}), { message: `${name} must have visible bounds inside the document` }).toEqual([]);\n}\n\nasync function expectIntrinsicWidth(\n\tname: string,\n\tsurface: ReturnType,\n): Promise {\n\tlet widths = await surface.evaluateAll(nodes => {\n\t\tlet host = nodes[0]?.closest('[contenteditable=\"true\"]');\n\t\tif (!host) return [];\n\t\tlet documentWidth = host.getBoundingClientRect().width;\n\t\treturn nodes.map(node => {\n\t\t\tlet copy = node.cloneNode(true) as HTMLElement;\n\t\t\tcopy.style.setProperty(\"display\", \"inline-block\", \"important\");\n\t\t\tcopy.style.setProperty(\"inline-size\", \"max-content\", \"important\");\n\t\t\tcopy.style.setProperty(\"max-inline-size\", \"none\", \"important\");\n\t\t\tcopy.style.setProperty(\"white-space\", \"nowrap\", \"important\");\n\t\t\tcopy.style.setProperty(\"visibility\", \"hidden\", \"important\");\n\t\t\tcopy.style.setProperty(\"position\", \"absolute\", \"important\");\n\t\t\thost.append(copy);\n\t\t\tlet width = copy.getBoundingClientRect().width;\n\t\t\tcopy.remove();\n\t\t\treturn { documentWidth, width };\n\t\t});\n\t});\n\texpect(widths.length, `${name} must be rendered before measuring its intrinsic width`)\n\t\t.toBeGreaterThan(0);\n\texpect(\n\t\twidths.every(value => value.width > value.documentWidth),\n\t\t`${name} must be intrinsically wide`,\n\t).toBe(true);\n}\n\nasync function expectVisibleMermaidSvg(page: Page): Promise {\n\tlet result = await content(page).getByRole(\"region\", { name: \"Diagram preview\" }).evaluateAll(\n\t\tregions => {\n\t\t\tlet documentBox = globalThis.document.querySelector(\"[data-plan-scroll]\")\n\t\t\t\t?.getBoundingClientRect();\n\t\t\tlet visible = regions.flatMap(region => {\n\t\t\t\tlet svg = region.querySelector(\"svg\");\n\t\t\t\tif (!svg) return [];\n\t\t\t\tlet rectangle = svg.getBoundingClientRect();\n\t\t\t\tlet regionBox = region.getBoundingClientRect();\n\t\t\t\tif (!svg.checkVisibility() || rectangle.width === 0 || rectangle.height === 0) return [];\n\t\t\t\treturn [{\n\t\t\t\t\tinside: !!documentBox && regionBox.left >= documentBox.left\n\t\t\t\t\t\t&& regionBox.right <= documentBox.right,\n\t\t\t\t\tintrinsicWidth: svg.viewBox.baseVal.width || svg.width.baseVal.value,\n\t\t\t\t\tdocumentWidth: documentBox?.width ?? 0,\n\t\t\t\t\toverflows: region.scrollWidth > region.clientWidth,\n\t\t\t\t}];\n\t\t\t});\n\t\t\treturn { all: regions.length, visible };\n\t\t},\n\t);\n\texpect(result.all, \"Mermaid must create SVG output\").toBeGreaterThan(0);\n\texpect(result.visible.length, \"Mermaid must paint a visible SVG\").toBeGreaterThan(0);\n\texpect(result.visible.every(value => value.inside), \"Mermaid scrollers must fit the document\")\n\t\t.toBe(true);\n\texpect(\n\t\tresult.visible.every(value => value.overflows),\n\t\t\"wide Mermaid diagrams must scroll internally\",\n\t)\n\t\t.toBe(true);\n\texpect(\n\t\tresult.visible.some(value => value.intrinsicWidth > value.documentWidth),\n\t\t\"Mermaid fixture must be intrinsically wider than the document\",\n\t).toBe(true);\n}\n\nasync function expectOwnScroller(\n\tname: string,\n\tsurface: ReturnType,\n): Promise {\n\tawait expect(surface.first(), `${name} must be rendered`).toBeAttached();\n\texpect(await surface.count(), `${name} must be rendered`).toBeGreaterThan(0);\n\tawait expect.poll(\n\t\t() => surface.evaluateAll(nodes => nodes.every(node => node.scrollWidth > node.clientWidth)),\n\t\t{ message: `${name} must overflow internally` },\n\t).toBe(true);\n}\n\nasync function expectHorizontalScroll(\n\tname: string,\n\tsurface: ReturnType,\n): Promise {\n\tawait surface.first().evaluate(node => {\n\t\tnode.scrollLeft = node.scrollWidth;\n\t});\n\tawait expect.poll(\n\t\t() => surface.first().evaluate(node => node.scrollLeft),\n\t\t{ message: `${name} must allow its hidden content to be reached` },\n\t).toBeGreaterThan(0);\n}\n\nasync function expectWrapped(name: string, surface: ReturnType): Promise {\n\tlet geometry = await surface.evaluate(node => {\n\t\tlet box = node.getBoundingClientRect();\n\t\tlet documentBox = node.closest(\"[data-plan-scroll]\")!.getBoundingClientRect();\n\t\tlet range = document.createRange();\n\t\trange.selectNodeContents(node);\n\t\treturn {\n\t\t\theight: box.height,\n\t\t\tinside: box.left >= documentBox.left && box.right <= documentBox.right,\n\t\t\tlines: range.getClientRects().length,\n\t\t};\n\t});\n\texpect(geometry.inside, `${name} must stay inside the document`).toBe(true);\n\texpect(geometry.lines, `${name} must wrap onto more than one line`).toBeGreaterThan(1);\n}\n\nasync function expectTabInsideStrip(tab: ReturnType) {\n\tawait expect.poll(() =>\n\t\ttab.evaluate(node => {\n\t\t\tlet strip = node.closest('[role=\"tablist\"]')!.getBoundingClientRect();\n\t\t\tlet box = node.getBoundingClientRect();\n\t\t\treturn box.left >= strip.left - 1 && box.right <= strip.right + 1;\n\t\t})\n\t).toBe(true);\n}\n\nasync function selectLastTab(tabs: ReturnType) {\n\tawait tabs.first().focus();\n\tawait tabs.first().press(\"End\");\n\tlet last = tabs.last();\n\tawait expect(last).toHaveAttribute(\"aria-selected\", \"true\");\n\tawait expect(last).toBeFocused();\n\tawait expectTabInsideStrip(last);\n}\n\ntype Join = (handle: string) => Promise;\ntype Seed = (source: string) => Promise;\n\nconst LONG_HANDLE = \"collaborator-with-a-name-long-enough-to-overflow-the-contained-cursor-label\";\n\nasync function expectRepresentativeSurfaces(\n\tbaseURL: string,\n\tjoin: Join,\n\tpage: Page,\n\troom: string,\n\tseed: Seed,\n): Promise {\n\tawait routeResponsiveImage(page);\n\tawait seed(RESPONSIVE_SOURCE);\n\tlet checkpoint = await readDocument(Number(new URL(baseURL).port), room);\n\tlet changes = await injectAgentChange(page, checkpoint);\n\tlet ana = await join(\"ana\");\n\tlet document = content(ana);\n\tlet surfaces = [\n\t\t{\n\t\t\tname: \"long link\",\n\t\t\tlocator: document.getByRole(\"link\", {\n\t\t\t\tname:\n\t\t\t\t\t\"TheCompleteArchitectureDecisionRecordForResponsiveWorkspaceContainmentMustWrapWithoutWideningTheDocument\",\n\t\t\t}),\n\t\t},\n\t\t{\n\t\t\tname: \"wide image\",\n\t\t\tlocator: document.getByRole(\"img\", { name: \"Responsive workspace reference\" }),\n\t\t},\n\t\t{\n\t\t\tname: \"Mermaid preview\",\n\t\t\tlocator: document.locator(\"[data-plan-language='mermaid'] [data-plan-preview]\"),\n\t\t},\n\t\t{ name: \"display math\", locator: document.locator('[data-plan-inline=\"false\"]') },\n\t\t{ name: \"tab strip\", locator: document.getByRole(\"tablist\") },\n\t\t{ name: \"tab panels\", locator: document.locator(\"[data-plan-panels]\") },\n\t\t{ name: \"callout\", locator: document.locator(\"[data-plan-type='warning']\") },\n\t\t{\n\t\t\tname: \"callout title\",\n\t\t\tlocator: document.getByRole(\"textbox\", { name: \"Callout title\" }),\n\t\t},\n\t\t{ name: \"inline code\", locator: document.locator(\":not(pre) > code\") },\n\t];\n\n\tfor (let surface of surfaces) await expectInsideDocumentWidth(surface.name, surface.locator);\n\tawait expectIntrinsicWidth(\"long link\", surfaces[0]!.locator);\n\tawait expectIntrinsicWidth(\"inline code\", surfaces.at(-1)!.locator);\n\tlet image = surfaces[1]!.locator;\n\texpect(\n\t\tawait image.evaluate(node => {\n\t\t\tlet documentWidth = node.closest(\"[data-plan-scroll]\")!.getBoundingClientRect().width;\n\t\t\treturn (node as HTMLImageElement).naturalWidth > documentWidth;\n\t\t}),\n\t\t\"image fixture must be intrinsically wider than the document\",\n\t).toBe(true);\n\tawait expectVisibleMermaidSvg(ana);\n\tawait expectOwnScroller(\n\t\t\"display math\",\n\t\tdocument.locator('[data-plan-inline=\"false\"] [data-plan-preview]'),\n\t);\n\tawait expectOwnScroller(\"tab strip\", document.getByRole(\"tablist\"));\n\tlet table = document.locator(\"table\");\n\tawait expect(table).toHaveCount(1);\n\tawait expectOwnScroller(\"wide table\", table);\n\tawait expect(document.locator(\"[data-plan-source]\")).not.toHaveCount(0);\n\tawait expect(ana.getByRole(\"button\", { name: /Comment on/ })).toBeAttached();\n\tawait changes.addedAtEnd();\n\tlet chip = ana.locator(\"[data-side]\");\n\tawait expect(chip).toBeVisible();\n\tawait expectInsideDocumentWidth(\"agent change chip\", chip);\n\tlet disclosure = chip.getByRole(\"button\", { name: \"What the agent changed\" });\n\tawait ana.keyboard.press(\"Tab\");\n\tawait disclosure.focus();\n\tawait expectFocusIndicator(disclosure);\n\tawait disclosure.click();\n\tawait expectOwnScroller(\n\t\t\"agent change excerpt\",\n\t\tchip.getByText(\n\t\t\t\"AgentChangeExcerptThatIsDeliberatelyLongEnoughToRequireTheChangeListToScrollOrTruncateInsideItsOwnContainedChrome\",\n\t\t),\n\t);\n\n\tlet bo = await join(LONG_HANDLE);\n\tawait content(bo).getByText(\n\t\t\"This deliberately long opening paragraph gives the fixture comment injector enough ordinary prose to quote while a reader can still find its argument among the richer blocks below.\",\n\t\t{ exact: true },\n\t).click({ position: { x: 1, y: 8 } });\n\tawait bo.keyboard.type(\" \");\n\tlet cursor = ana.getByText(LONG_HANDLE, { exact: true });\n\tawait expect(cursor).toHaveText(LONG_HANDLE);\n\tawait expectInsideDocumentWidth(\"remote cursor label\", cursor);\n\tawait expectOwnScroller(\"remote cursor label\", cursor);\n}\n\nfor (let viewport of RESPONSIVE_VIEWPORTS) {\n\ttest(`${viewport.name} exposes every required responsive surface`, async ({ baseURL, join, page, room, seed }) => {\n\t\tawait page.setViewportSize(viewport);\n\t\tawait expectRepresentativeSurfaces(baseURL!, join, page, room, seed);\n\t});\n}\n\ntest(\"the Planner change disclosure animates only pointer-owned glyph swaps\", async ({ baseURL, join, page, room, seed }) => {\n\tawait seed(RESPONSIVE_SOURCE);\n\tlet checkpoint = await readDocument(Number(new URL(baseURL!).port), room);\n\tlet changes = await injectAgentChange(page, checkpoint);\n\tpage = await join(\"change-reader\");\n\tawait changes.addedAtEnd();\n\tlet trigger = page.getByRole(\"button\", { name: \"What the agent changed\" });\n\tlet icon = trigger.locator(\"[data-feedback-icon]\");\n\tawait expect(icon).toHaveAttribute(\"data-feedback-icon\", \"closed\");\n\tawait page.evaluate(() => {\n\t\tlet transitionCounter = { starts: 0 };\n\t\tReflect.set(window, \"__changeIconTransitions\", transitionCounter);\n\t\tdocument.addEventListener(\"transitionstart\", event => {\n\t\t\tif (\n\t\t\t\tevent.target instanceof Element\n\t\t\t\t&& event.target.matches('[data-motion-feedback=\"icon\"]')\n\t\t\t) transitionCounter.starts++;\n\t\t}, true);\n\t});\n\tawait trigger.click();\n\tawait page.keyboard.press(\"Shift\");\n\tawait expect(icon).toHaveAttribute(\"data-feedback-icon\", \"open\");\n\tawait expect(icon).toHaveCSS(\"transition-duration\", \"0.25s\");\n\tawait expect.poll(() =>\n\t\tpage.evaluate(() => {\n\t\t\tlet transitionCounter = Reflect.get(window, \"__changeIconTransitions\") as { starts: number };\n\t\t\treturn transitionCounter.starts;\n\t\t})\n\t).toBeGreaterThan(0);\n\tlet pointerStarts = await page.evaluate(() => {\n\t\tlet transitionCounter = Reflect.get(window, \"__changeIconTransitions\") as { starts: number };\n\t\treturn transitionCounter.starts;\n\t});\n\tawait page.mouse.click(1, 1);\n\tawait page.keyboard.press(\"Shift\");\n\tawait expect(icon).toHaveAttribute(\"data-feedback-icon\", \"closed\");\n\tawait expect(icon).toHaveCSS(\"transition-duration\", \"0.25s\");\n\tawait expect.poll(() =>\n\t\tpage.evaluate(() => {\n\t\t\tlet transitionCounter = Reflect.get(window, \"__changeIconTransitions\") as { starts: number };\n\t\t\treturn transitionCounter.starts;\n\t\t})\n\t).toBeGreaterThan(pointerStarts);\n\tpointerStarts = await page.evaluate(() => {\n\t\tlet transitionCounter = Reflect.get(window, \"__changeIconTransitions\") as { starts: number };\n\t\treturn transitionCounter.starts;\n\t});\n\n\tawait trigger.focus();\n\tawait page.keyboard.press(\"Space\");\n\tawait expect(icon).toHaveAttribute(\"data-feedback-icon\", \"open\");\n\tawait expect(icon).toHaveCSS(\"transition-duration\", \"0s\");\n\tawait icon.hover();\n\tawait expect(icon).toHaveCSS(\"transition-duration\", \"0s\");\n\texpect(\n\t\tawait page.evaluate(() => {\n\t\t\tlet transitionCounter = Reflect.get(window, \"__changeIconTransitions\") as { starts: number };\n\t\t\treturn transitionCounter.starts;\n\t\t}),\n\t).toBe(pointerStarts);\n\n\tawait page.emulateMedia({ reducedMotion: \"reduce\" });\n\tawait trigger.click();\n\tawait expect(icon).toHaveAttribute(\"data-feedback-icon\", \"closed\");\n\tawait expect(icon).toHaveCSS(\"transition-duration\", \"0s\");\n\texpect(\n\t\tawait page.evaluate(() => {\n\t\t\tlet transitionCounter = Reflect.get(window, \"__changeIconTransitions\") as { starts: number };\n\t\t\treturn transitionCounter.starts;\n\t\t}),\n\t).toBe(pointerStarts);\n});\n\nfor (let viewport of RESPONSIVE_VIEWPORTS) {\n\ttest(`${viewport.name} keeps hostile rich content readable and navigable`, async ({ join, seed }) => {\n\t\tawait seed(RESPONSIVE_SOURCE);\n\t\tlet page = await join(`reader-${viewport.width}`, { viewport });\n\t\tlet document = content(page);\n\t\tawait expectWrapped(\n\t\t\t\"normal heading\",\n\t\t\tdocument.getByRole(\"heading\", {\n\t\t\t\tname:\n\t\t\t\t\t\"A deliberately detailed authored heading that must wrap at normal word boundaries inside a compact document\",\n\t\t\t}),\n\t\t);\n\t\tawait expectWrapped(\n\t\t\t\"unbroken heading\",\n\t\t\tdocument.getByRole(\"heading\", {\n\t\t\t\tname:\n\t\t\t\t\t\"CompactDocumentMeasureMustRemainReadableWithoutForcingTheViewportWiderThanTheDocument\",\n\t\t\t}),\n\t\t);\n\t\tlet code = document.locator(\"[data-plan-language='typescript'] [data-plan-preview] > div\");\n\t\tlet table = document.locator(\"table\");\n\t\tif (viewport.name === \"compact\") {\n\t\t\tawait expectOwnScroller(\"long code line\", code);\n\t\t\tawait expectOwnScroller(\"wide table\", table);\n\t\t\tawait expectHorizontalScroll(\"long code line\", code);\n\t\t\tawait expectHorizontalScroll(\"wide table\", table);\n\t\t} else {\n\t\t\tawait expectInsideDocumentWidth(\"long code line\", code);\n\t\t\tawait expectOwnScroller(\"wide table\", table);\n\t\t}\n\n\t\tlet strip = document.getByRole(\"tablist\");\n\t\tawait expectOwnScroller(\"tab strip\", strip);\n\t\tawait selectLastTab(strip.getByRole(\"tab\"));\n\n\t\tlet callout = document.locator(\"[data-plan-type='warning']\");\n\t\tawait expectInsideDocumentWidth(\"callout\", callout);\n\t\tawait expectWrapped(\"callout title\", callout.getByRole(\"textbox\", { name: \"Callout title\" }));\n\t\tawait expectNoHorizontalOverflow(page);\n\t});\n}\n\ntest(\"reduced motion reveals a keyboard-selected tab immediately\", async ({ join, seed }) => {\n\tawait seed(RESPONSIVE_SOURCE);\n\tlet page = await join(\"reduced-motion-reader\", {\n\t\treducedMotion: \"reduce\",\n\t\tviewport: { width: 390, height: 844 },\n\t});\n\tlet tabs = content(page).getByRole(\"tablist\").getByRole(\"tab\");\n\tawait selectLastTab(tabs);\n});\n\ntest(\"a selected tab follows strip layout changes without moving the document\", async ({ join, seed }) => {\n\tawait seed(RESPONSIVE_SOURCE);\n\tlet page = await join(\"resized-tab-reader\", { viewport: { width: 390, height: 844 } });\n\tlet scroller = page.locator(\"[data-plan-scroll]\");\n\tlet tabs = content(page).getByRole(\"tablist\").getByRole(\"tab\");\n\tawait selectLastTab(tabs);\n\tawait scroller.evaluate(node => {\n\t\tnode.scrollTop = node.scrollHeight;\n\t});\n\texpect(\n\t\tawait scroller.evaluate(node => node.scrollHeight - node.clientHeight - node.scrollTop),\n\t).toBeLessThanOrEqual(1);\n\tawait tabs.first().evaluate(node => {\n\t\tnode.textContent = \"A preceding collaborative tab label that became dramatically wider\";\n\t});\n\tawait expectTabInsideStrip(tabs.last());\n\tawait page.setViewportSize({ width: 320, height: 844 });\n\tawait expectTabInsideStrip(tabs.last());\n\t// Scroll anchoring follows the reflow, but the wrapped decision cards at the\n\t// foot of the scroller still add a few lines of drift. A regression that\n\t// moved the document would be hundreds of pixels, not dozens.\n\tawait expect.poll(() =>\n\t\tscroller.evaluate(node => node.scrollHeight - node.clientHeight - node.scrollTop)\n\t).toBeLessThanOrEqual(64);\n});\n\ntest(\"authored blocks share the prose edge and unavailable images degrade in place\", async ({ join, page, seed }) => {\n\tawait page.setViewportSize({ width: 1440, height: 900 });\n\tawait page.route(RESPONSIVE_IMAGE_URL, route => route.abort());\n\tawait seed(RESPONSIVE_SOURCE);\n\tpage = await join(\"unavailable-image-reader\");\n\tlet document = content(page);\n\tlet block = document.getByRole(\"img\", { name: \"Responsive workspace reference\" });\n\tlet inline = document.getByRole(\"img\", { name: \"Mixed prose reference\" });\n\tawait expect(block).toHaveText(\"Responsive workspace reference\");\n\tawait expect(inline).toHaveText(\"Mixed prose reference\");\n\tawait expect(document.getByRole(\"img\", { name: \"Contained callout reference\" })).toBeVisible();\n\n\tlet geometry = await document.evaluate(root => {\n\t\t// oxlint-disable-next-line unicorn(consistent-function-scoping) -- The callback executes in the browser realm.\n\t\tlet rectangle = (element: Element | null) => {\n\t\t\tif (!element) throw new Error(\"authored block is missing\");\n\t\t\tlet box = element.getBoundingClientRect();\n\t\t\treturn {\n\t\t\t\tleft: box.left,\n\t\t\t\ttop: box.top,\n\t\t\t\tright: box.right,\n\t\t\t\twidth: box.width,\n\t\t\t\theight: box.height,\n\t\t\t};\n\t\t};\n\t\tlet frame = root.querySelector('[aria-label=\"Responsive workspace reference\"]');\n\t\tlet math = root.querySelector('.planMath[data-plan-inline=\"false\"]');\n\t\treturn {\n\t\t\tprose: rectangle(root.querySelector(\":scope > p\")),\n\t\t\ttable: rectangle(root.querySelector(\":scope > table\")),\n\t\t\tblock: rectangle(frame),\n\t\t\tblockRow: rectangle(frame?.closest(\"p\") ?? null),\n\t\t\tinline: getComputedStyle(root.querySelector('[aria-label=\"Mixed prose reference\"]')!)\n\t\t\t\t.display,\n\t\t\tmath: rectangle(math),\n\t\t\ttoggle: rectangle(math?.querySelector('button[aria-label=\"Show source\"]') ?? null),\n\t\t};\n\t});\n\n\texpect(Math.abs(geometry.table.left - geometry.prose.left)).toBeLessThanOrEqual(1);\n\texpect(Math.abs(geometry.block.left - geometry.prose.left)).toBeLessThanOrEqual(1);\n\texpect(Math.abs(geometry.block.width - geometry.prose.width)).toBeLessThanOrEqual(1);\n\texpect(geometry.inline).toBe(\"inline-flex\");\n\texpect(Math.abs(geometry.toggle.top - geometry.math.top)).toBeLessThanOrEqual(1);\n\texpect(Math.abs(geometry.toggle.right - geometry.math.right)).toBeLessThanOrEqual(1);\n\t// The paragraph's managed line break must not add an empty line under the frame.\n\texpect(Math.abs(geometry.blockRow.height - geometry.block.height)).toBeLessThanOrEqual(1);\n\n\t// Revealed by focus within the block, not only by hover.\n\tlet formula = document.locator('.planMath[data-plan-inline=\"false\"]').first();\n\tlet toggle = formula.getByRole(\"button\", { name: \"Show source\" });\n\tawait page.mouse.move(0, 0);\n\tawait expect(toggle).toHaveCSS(\"opacity\", \"0\");\n\tawait toggle.evaluate(node => (node as HTMLElement).focus());\n\tawait expect(toggle).toHaveCSS(\"opacity\", \"1\");\n});\n\ntest(\"rich surfaces stay contained within their document or callout\", async ({ join, page, seed }) => {\n\tawait page.setViewportSize({ width: 1440, height: 900 });\n\tawait routeResponsiveImage(page);\n\tawait seed(RESPONSIVE_SOURCE);\n\tpage = await join(\"wide-surface-reader\");\n\tlet document = content(page);\n\tawait expect(document.getByRole(\"img\", { name: \"Responsive workspace reference\" })).toBeVisible();\n\tawait expect(document.getByRole(\"img\", { name: \"Mixed prose reference\" })).toBeVisible();\n\tawait expect(document.getByRole(\"img\", { name: \"Contained callout reference\" })).toBeVisible();\n\tawait expect(document.getByRole(\"region\", { name: \"Diagram preview\" })).toBeVisible();\n\tlet geometry = await document.evaluate(root => {\n\t\t// oxlint-disable-next-line unicorn(consistent-function-scoping) -- The callback executes in the browser realm.\n\t\tlet rectangle = (element: Element | null) => {\n\t\t\tif (!element) throw new Error(\"responsive surface is missing\");\n\t\t\tlet box = element.getBoundingClientRect();\n\t\t\treturn { left: box.left, right: box.right, width: box.width };\n\t\t};\n\t\tlet image = root.querySelector(\n\t\t\t'img[alt=\"Responsive workspace reference\"]',\n\t\t);\n\t\tlet imageRow = image?.closest(\"p\") ?? null;\n\t\tlet mixedImage = root.querySelector('img[alt=\"Mixed prose reference\"]');\n\t\tlet mixed = mixedImage?.closest(\"p\") ?? null;\n\t\tlet nested = root.querySelector(\n\t\t\t'img[alt=\"Contained callout reference\"]',\n\t\t);\n\t\tlet callout = nested?.closest('[data-plan-type=\"warning\"]') ?? null;\n\t\tlet mermaid = root.querySelector('[aria-label=\"Diagram preview\"]')\n\t\t\t?.closest('[data-plan-language=\"mermaid\"]') ?? null;\n\t\tlet scroller = root.closest(\"[data-plan-scroll]\");\n\t\treturn {\n\t\t\tcallout: rectangle(callout),\n\t\t\tdocument: rectangle(scroller),\n\t\t\timage: rectangle(image),\n\t\t\timageRow: rectangle(imageRow),\n\t\t\tmermaid: rectangle(mermaid),\n\t\t\tmixed: rectangle(mixed),\n\t\t\tmixedImage: rectangle(mixedImage),\n\t\t\tnested: rectangle(nested),\n\t\t\ttable: rectangle(root.querySelector(\":scope > table\")),\n\t\t};\n\t});\n\n\tfor (let surface of [geometry.table, geometry.imageRow, geometry.mermaid]) {\n\t\texpect(surface.left).toBeGreaterThanOrEqual(geometry.document.left);\n\t\texpect(surface.right).toBeLessThanOrEqual(geometry.document.right);\n\t}\n\texpect(geometry.image.left).toBeGreaterThanOrEqual(geometry.imageRow.left);\n\texpect(geometry.image.right).toBeLessThanOrEqual(geometry.imageRow.right);\n\texpect(geometry.mixedImage.left).toBeGreaterThanOrEqual(geometry.mixed.left);\n\texpect(geometry.mixedImage.right).toBeLessThanOrEqual(geometry.mixed.right);\n\texpect(geometry.nested.left).toBeGreaterThanOrEqual(geometry.callout.left);\n\texpect(geometry.nested.right).toBeLessThanOrEqual(geometry.callout.right);\n\tawait expectNoHorizontalOverflow(page);\n});\n\nfor (let viewport of RESPONSIVE_VIEWPORTS) {\n\ttest(`${viewport.name} keeps wide content in its own scrollers`, async ({ join, page, seed }) => {\n\t\tawait page.setViewportSize(viewport);\n\t\tawait routeResponsiveImage(page);\n\t\tawait seed(RESPONSIVE_SOURCE);\n\t\tpage = await join(\"ana\");\n\t\tlet table = content(page).locator(\"table\");\n\n\t\texpect(await table.evaluate(node => node.scrollWidth > node.clientWidth)).toBe(true);\n\t\tawait expectNoHorizontalOverflow(page);\n\t\tawait expectInsideDocumentWidth(\"wide table\", 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