File config.test.ts

packages/migration-legacy/test/steps/config.test.ts:None–None

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