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21 lines
933 B
TypeScript
21 lines
933 B
TypeScript
import { expect, it } from 'vitest'
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import { extendTranscriptBoundary } from './transcript-file-version'
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it('owns only the final 64 bytes of a large read', () => {
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const chunk = Buffer.alloc(4 * 1024 * 1024, 'x')
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chunk.write('end', chunk.length - 3)
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const boundary = extendTranscriptBoundary(Buffer.from('previous'), chunk)
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expect(boundary.toString()).toBe(`${'x'.repeat(61)}end`)
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expect(boundary.buffer.byteLength).toBe(64)
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chunk.fill('y')
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expect(boundary.toString()).toBe(`${'x'.repeat(61)}end`)
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})
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it('retains the consumed suffix across short reads and reset-sized inputs', () => {
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const first = extendTranscriptBoundary(Buffer.alloc(0), Buffer.from('first'))
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const next = extendTranscriptBoundary(first, Buffer.from(' next'))
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expect(next.toString()).toBe('first next')
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expect(next.buffer.byteLength).toBe(next.length)
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expect(extendTranscriptBoundary(Buffer.alloc(0), Buffer.alloc(0)).length).toBe(0)
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})
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