// payload-trees.test.mjs — the materialized trees are byte-identical to the
// fixtures that used to sit on disk (sha256 measured before deletion, S1).

import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { readFileSync, readdirSync } from 'node:fs';
import { join, relative } from 'node:path';
import { createHash } from 'node:crypto';
import { PAYLOAD_TREES, materializeTree } from './payload-trees.mjs';

function walk(dir) {
  return readdirSync(dir, { withFileTypes: true, recursive: true })
    .filter(e => e.isFile())
    .map(e => join(e.parentPath, e.name));
}

describe('payload-trees: materialized bytes match the retired on-disk fixtures', () => {
  for (const name of Object.keys(PAYLOAD_TREES)) {
    it(name, () => {
      const { dir, cleanup } = materializeTree(name);
      try {
        const written = walk(dir).map(f => relative(dir, f)).sort();
        assert.deepEqual(written, Object.keys(PAYLOAD_TREES[name]).sort(), 'file set changed');
        for (const [rel, { sha256 }] of Object.entries(PAYLOAD_TREES[name])) {
          const got = createHash('sha256').update(readFileSync(join(dir, rel))).digest('hex');
          assert.equal(got, sha256, `${name}/${rel} differs from the retired fixture`);
        }
      } finally {
        cleanup();
      }
    });
  }
});