30 lines
1.3 KiB
TypeScript
30 lines
1.3 KiB
TypeScript
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/**
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* @module tests/unit/db/pad-frame-total
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* @description Pad-frame construction is TOTAL: every size from the minimum
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* through 4096+257 is constructible byte-exact (a production adoption found
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* the msgpack class-boundary hole at 291 bytes — sync died whole, and the
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* failure cascaded into a counter rewind after a successful append). Every
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* constructed pad decodes as skip-by-definition filler.
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*/
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import { describe, it, expect } from 'vitest'
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import { encodePadFrame, minPadFrameBytes, decodeGroupV2 } from '../../../src/db/factLogFormat.js'
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describe('pad frames are constructible at EVERY size', () => {
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it('exact construction from the minimum through a full sector + boundary spill', () => {
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const min = minPadFrameBytes()
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for (let size = min; size <= 4096 + 257; size++) {
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const frame = encodePadFrame(size)
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expect(frame.length, `size ${size}`).toBe(size)
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}
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})
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it('the production case (291) and its class-boundary siblings decode as invisible filler', () => {
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for (const size of [291, minPadFrameBytes(), 300, 511, 512, 513, 4096]) {
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const frame = encodePadFrame(size)
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const group = decodeGroupV2(frame)
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expect(group.facts, `size ${size} is reader-invisible`).toEqual([])
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expect(group.validBytes).toBe(size)
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}
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})
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})
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