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truewhile
31 lines
1.3 KiB
TypeScript
31 lines
1.3 KiB
TypeScript
import { strict as assert } from 'node:assert'
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import { createPlaybackRequestGuard } from './playbackRequestGuard.ts'
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const guard = createPlaybackRequestGuard()
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const first = guard.begin()
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assert.equal(first(), true)
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const second = guard.begin()
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assert.equal(first(), false, 'a newer quality request supersedes the earlier request')
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assert.equal(second(), true)
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guard.invalidate()
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assert.equal(second(), false, 'media changes, unmount and direct/local switches cancel a pending cloud result')
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let resolveRequest: (value: string) => void = () => {}
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const request = new Promise<string>(resolve => { resolveRequest = resolve })
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const current = guard.begin()
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let applied = 'episode-B'
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const settled = request.then(value => { if (current()) applied = value })
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guard.invalidate()
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resolveRequest('episode-A')
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await settled
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assert.equal(applied, 'episode-B', 'a delayed response cannot overwrite the next media')
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let rejected: (error: Error) => void = () => {}
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const failed = new Promise<never>((_, reject) => { rejected = reject })
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const activeFailure = guard.begin()
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let fallbackCount = 0
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const caught = failed.catch(() => { if (activeFailure()) fallbackCount += 1 })
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guard.invalidate()
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rejected(new Error('old request failed'))
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await caught
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assert.equal(fallbackCount, 0, 'a stale rejection cannot force a local fallback')
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console.log('playbackRequestGuard.test.ts ok')
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