| 1 | // Run: tsx src/__tests__/composer-menu-viewport.test.ts |
| 2 | |
| 3 | import { JSDOM } from "jsdom"; |
| 4 | import { |
| 5 | COMPOSER_MENU_AVAILABLE_HEIGHT, |
| 6 | composerMenuAvailableHeight, |
| 7 | observeComposerMenuViewport, |
| 8 | } from "../lib/composerMenuViewport"; |
| 9 | |
| 10 | let passed = 0; |
| 11 | let failed = 0; |
| 12 | |
| 13 | function ok(value: boolean, label: string) { |
| 14 | if (value) { |
| 15 | process.stdout.write(` PASS ${label}\n`); |
| 16 | passed += 1; |
| 17 | } else { |
| 18 | process.stdout.write(` FAIL ${label}\n`); |
| 19 | failed += 1; |
| 20 | } |
| 21 | } |
| 22 | |
| 23 | function eq(actual: unknown, expected: unknown, label: string) { |
| 24 | ok(actual === expected, `${label}: expected ${JSON.stringify(expected)}, got ${JSON.stringify(actual)}`); |
| 25 | } |
| 26 | |
| 27 | function rect(top: number): DOMRect { |
| 28 | return { |
| 29 | left: 0, |
| 30 | top, |
| 31 | right: 600, |
| 32 | bottom: top + 120, |
| 33 | width: 600, |
| 34 | height: 120, |
| 35 | x: 0, |
| 36 | y: top, |
| 37 | toJSON: () => ({}), |
| 38 | } as DOMRect; |
| 39 | } |
| 40 | |
| 41 | class TestResizeObserver { |
| 42 | static instance: TestResizeObserver | null = null; |
| 43 | readonly observed = new Set<Element>(); |
| 44 | disconnected = false; |
| 45 | |
| 46 | constructor(private readonly callback: ResizeObserverCallback) { |
| 47 | TestResizeObserver.instance = this; |
| 48 | } |
| 49 | |
| 50 | observe(target: Element) { |
| 51 | this.observed.add(target); |
| 52 | } |
| 53 | |
| 54 | unobserve(target: Element) { |
| 55 | this.observed.delete(target); |
| 56 | } |
| 57 | |
| 58 | disconnect() { |
| 59 | this.disconnected = true; |
| 60 | this.observed.clear(); |
| 61 | } |
| 62 | |
| 63 | trigger() { |
| 64 | this.callback([], this as unknown as ResizeObserver); |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | console.log("\ncomposer menu viewport geometry"); |
| 69 | |
| 70 | const dom = new JSDOM(`<!doctype html><html><body> |
| 71 | <div id="layout"> |
| 72 | <main id="chat"></main> |
| 73 | <footer id="footer"><div id="anchor"><div class="slashmenu"></div></div></footer> |
| 74 | <section id="terminal"></section> |
| 75 | </div> |
| 76 | </body></html>`, { pretendToBeVisual: true }); |
| 77 | |
| 78 | globalThis.window = dom.window as unknown as Window & typeof globalThis; |
| 79 | globalThis.document = dom.window.document; |
| 80 | globalThis.Element = dom.window.Element; |
| 81 | globalThis.HTMLElement = dom.window.HTMLElement; |
| 82 | globalThis.Event = dom.window.Event; |
| 83 | globalThis.ResizeObserver = TestResizeObserver as unknown as typeof ResizeObserver; |
| 84 | |
| 85 | let nextFrameId = 1; |
| 86 | const frames = new Map<number, FrameRequestCallback>(); |
| 87 | const requestFrame = (callback: FrameRequestCallback) => { |
| 88 | const id = nextFrameId++; |
| 89 | frames.set(id, callback); |
| 90 | return id; |
| 91 | }; |
| 92 | const cancelFrame = (id: number) => frames.delete(id); |
| 93 | dom.window.requestAnimationFrame = requestFrame; |
| 94 | dom.window.cancelAnimationFrame = cancelFrame; |
| 95 | globalThis.requestAnimationFrame = requestFrame; |
| 96 | globalThis.cancelAnimationFrame = cancelFrame; |
| 97 | |
| 98 | function flushFrames() { |
| 99 | const queued = [...frames.entries()]; |
| 100 | frames.clear(); |
| 101 | for (const [, callback] of queued) callback(0); |
| 102 | } |
| 103 | |
| 104 | const anchor = document.getElementById("anchor"); |
| 105 | const terminal = document.getElementById("terminal"); |
| 106 | if (!(anchor instanceof HTMLElement) || !(terminal instanceof HTMLElement)) { |
| 107 | throw new Error("missing geometry test elements"); |
| 108 | } |
| 109 | |
| 110 | let anchorTop = 567; |
| 111 | anchor.getBoundingClientRect = () => rect(anchorTop); |
| 112 | |
| 113 | eq(composerMenuAvailableHeight(anchorTop), 553, "normal layout exposes the full 360px CSS cap"); |
| 114 | eq(composerMenuAvailableHeight(10), 0, "tiny viewports never produce a negative max height"); |
| 115 | |
| 116 | const stop = observeComposerMenuViewport(anchor); |
| 117 | eq(anchor.style.getPropertyValue(COMPOSER_MENU_AVAILABLE_HEIGHT), "553px", "initial layout is measured synchronously"); |
| 118 | |
| 119 | const observer = TestResizeObserver.instance; |
| 120 | if (!observer) throw new Error("ResizeObserver was not installed"); |
| 121 | ok(observer.observed.has(terminal), "terminal sibling is observed because it can move the composer anchor"); |
| 122 | |
| 123 | // Reproduce the constrained layout from the review: terminal + tall composer |
| 124 | // move the anchor to y=207. The menu has 207 - 6 (anchor gap) - 8 (safe edge) |
| 125 | // = 193px, so its first rows remain on-screen and the rest scroll internally. |
| 126 | anchorTop = 207; |
| 127 | observer.trigger(); |
| 128 | flushFrames(); |
| 129 | eq(anchor.style.getPropertyValue(COMPOSER_MENU_AVAILABLE_HEIGHT), "193px", "terminal expansion uses real space above the composer"); |
| 130 | |
| 131 | anchorTop = 307; |
| 132 | window.dispatchEvent(new Event("resize")); |
| 133 | flushFrames(); |
| 134 | eq(anchor.style.getPropertyValue(COMPOSER_MENU_AVAILABLE_HEIGHT), "293px", "viewport resize recomputes the geometry"); |
| 135 | |
| 136 | observer.trigger(); |
| 137 | stop(); |
| 138 | eq(frames.size, 0, "cleanup cancels a queued geometry frame"); |
| 139 | eq(anchor.style.getPropertyValue(COMPOSER_MENU_AVAILABLE_HEIGHT), "", "cleanup removes the temporary CSS variable"); |
| 140 | ok(observer.disconnected, "cleanup disconnects layout observers"); |
| 141 | |
| 142 | dom.window.close(); |
| 143 | |
| 144 | console.log(`\n${passed} passed, ${failed} failed`); |
| 145 | if (failed > 0) process.exit(1); |
| 146 |