| 1 | import assert from 'node:assert/strict'; |
| 2 | import { test } from 'node:test'; |
| 3 | import { createAvatarLoader, type AvatarCache } from '../src/lib/avatar-cache.ts'; |
| 4 | |
| 5 | function memoryCache(): AvatarCache & { entries: Map<string, Response> } { |
| 6 | const entries = new Map<string, Response>(); |
| 7 | return { |
| 8 | entries, |
| 9 | async match(key) { |
| 10 | return entries.get(key)?.clone(); |
| 11 | }, |
| 12 | async put(key, response) { |
| 13 | entries.set(key, response.clone()); |
| 14 | } |
| 15 | }; |
| 16 | } |
| 17 | |
| 18 | function image(body = 'avatar', status = 200): Response { |
| 19 | return new Response(body, { status, headers: { 'Content-Type': 'image/png' } }); |
| 20 | } |
| 21 | |
| 22 | test('avatar cache coalesces simultaneous misses and persists results', async () => { |
| 23 | const store = memoryCache(); |
| 24 | let loads = 0; |
| 25 | let release: ((response: Response) => void) | undefined; |
| 26 | let signalLoadStarted: (() => void) | undefined; |
| 27 | const loadStarted = new Promise<void>((resolve) => (signalLoadStarted = resolve)); |
| 28 | const loader = createAvatarLoader(async () => store, async () => { |
| 29 | loads += 1; |
| 30 | signalLoadStarted?.(); |
| 31 | return new Promise((resolve) => (release = resolve)); |
| 32 | }); |
| 33 | |
| 34 | const first = loader('/api/media?mxc=avatar', 'avatar'); |
| 35 | const second = loader('/api/media?mxc=avatar', 'avatar'); |
| 36 | await loadStarted; |
| 37 | assert.equal(loads, 1); |
| 38 | release?.(image()); |
| 39 | assert.equal(await (await first).text(), 'avatar'); |
| 40 | assert.equal(await (await second).text(), 'avatar'); |
| 41 | |
| 42 | const nextWorker = createAvatarLoader(async () => store, async () => { |
| 43 | loads += 1; |
| 44 | return image('unexpected'); |
| 45 | }); |
| 46 | assert.equal(await (await nextWorker('/api/media?mxc=avatar', 'avatar')).text(), 'avatar'); |
| 47 | assert.equal(loads, 1); |
| 48 | }); |
| 49 | |
| 50 | test('avatar cache retries unsuccessful responses', async () => { |
| 51 | const store = memoryCache(); |
| 52 | let loads = 0; |
| 53 | const loader = createAvatarLoader(async () => store, async () => ++loads === 1 ? image('missing', 404) : image()); |
| 54 | assert.equal((await loader('/avatar', 'avatar')).status, 404); |
| 55 | assert.equal(await (await loader('/avatar', 'avatar')).text(), 'avatar'); |
| 56 | assert.equal(loads, 2); |
| 57 | }); |
| 58 | |
| 59 | test('avatar cache read failures still return the image', async () => { |
| 60 | let loads = 0; |
| 61 | const cache: AvatarCache = { |
| 62 | async match() { |
| 63 | throw new Error('read failed'); |
| 64 | }, |
| 65 | async put() {} |
| 66 | }; |
| 67 | const loader = createAvatarLoader(async () => cache, async () => { |
| 68 | loads += 1; |
| 69 | return image(); |
| 70 | }); |
| 71 | |
| 72 | assert.equal(await (await loader('/avatar', 'avatar')).text(), 'avatar'); |
| 73 | assert.equal(loads, 1); |
| 74 | }); |
| 75 | |
| 76 | test('avatar cache write failures still return the image', async () => { |
| 77 | let loads = 0; |
| 78 | const cache: AvatarCache = { |
| 79 | async match() { |
| 80 | return undefined; |
| 81 | }, |
| 82 | async put() { |
| 83 | throw new Error('write failed'); |
| 84 | } |
| 85 | }; |
| 86 | const loader = createAvatarLoader(async () => cache, async () => { |
| 87 | loads += 1; |
| 88 | return image(); |
| 89 | }); |
| 90 | |
| 91 | assert.equal(await (await loader('/avatar', 'avatar')).text(), 'avatar'); |
| 92 | assert.equal(loads, 1); |
| 93 | }); |