import { test, afterEach } from 'node:test'
import assert from 'node:assert/strict'
import { failError } from '../logger.js'

const realWrite = process.stderr.write

afterEach(() => {
  process.stderr.write = realWrite
})

// 攔截寫入 stderr 的內容
function captureStderr(fn) {
  const chunks = []
  process.stderr.write = (chunk) => {
    chunks.push(String(chunk))
    return true
  }
  try {
    fn()
  } finally {
    process.stderr.write = realWrite
  }
  return chunks.join('')
}

test('failError 對 Error 物件輸出名稱、訊息與堆疊', () => {
  const out = captureStderr(() => failError(new TypeError('boom')))
  assert.match(out, /\[ERR\]  TypeError: boom/)
  assert.match(out, /at /) // 堆疊內容
})

test('failError 對非 Error 值輸出其字串形式', () => {
  const out = captureStderr(() => failError('plain failure'))
  assert.match(out, /\[ERR\]  plain failure/)
})