File marker.test.ts

packages/migration-legacy/test/marker.test.ts:None–None

import { describe, expect, it, beforeEach, afterEach } from 'vitest';
import { mkdtemp, rm, readFile, writeFile, mkdir } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { join } from 'node:path';