mirror of
https://github.com/Permissionless-Software-Foundation/psf-memo.git
synced 2026-09-21 16:52:01 -07:00
Chris Troutner
6a8cf6653e
Deduplicate the postHeights query iteration into a shared generator, extract shared pagination parsing/enrichment, and extract the idempotent create-if-missing write pattern. Reduces CRAP for the changed post-height code to <=6 and removes duplicated parse/attach logic across the post list use cases. Add property tests covering the postHeight key round-trip and ordering invariants for both the DB and indexer, exposed via a separate 'property' command. By refactorer.
43 lines
1.2 KiB
JavaScript
43 lines
1.2 KiB
JavaScript
/*
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Small property-testing harness for psf-memo-indexer.
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Mirrors psf-memo-db/test/property/harness.js: a deterministic, seeded PRNG
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plus a forAll helper so property runs are reproducible without a property
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framework dependency.
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*/
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import assert from 'node:assert/strict'
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// A small deterministic PRNG (mulberry32). Same seed => same stream.
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export function seededRandom (seed = 12345) {
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let a = seed >>> 0
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return function next () {
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a |= 0
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a = (a + 0x6d2b79f5) | 0
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let t = Math.imul(a ^ (a >>> 15), 1 | a)
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t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t
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return ((t ^ (t >>> 14)) >>> 0) / 4294967296
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}
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}
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export async function forAll (gen, check, { samples = 500, label = 'property' } = {}) {
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for (let i = 0; i < samples; i++) {
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const input = gen(i)
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const ok = await check(input)
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assert.ok(ok, `${label} failed at sample ${i} for input: ${JSON.stringify(input)}`)
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}
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}
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export function intGen (rng, min, max) {
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return () => min + Math.floor(rng() * (max - min + 1))
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}
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export function txidGen (rng) {
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const hex = '0123456789abcdef'
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let out = ''
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for (let i = 0; i < 64; i++) {
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out += hex[Math.floor(rng() * hex.length)]
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}
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return out
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}
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