// 空文档占位：空文档首段挂 .doc-placeholder（CSS 显示「开始输入…」），有内容时不挂。
import { describe, it, expect, afterEach } from 'vitest'
import type { Editor } from '@milkdown/kit/core'
import { createMarkdownEditor } from '../src/editor/editor'

let editors: Editor[] = []
afterEach(async () => {
  for (const e of editors) { try { await e.destroy() } catch { /* ignore */ } }
  editors = []
  document.body.innerHTML = ''
})

async function load(md: string): Promise<HTMLElement> {
  const root = document.createElement('div')
  document.body.appendChild(root)
  const editor = createMarkdownEditor(root, md)
  editors.push(editor)
  await editor.create()
  return root
}

describe('空文档占位', () => {
  it('空文档有占位类，非空文档没有', async () => {
    const emptyRoot = await load('')
    expect(emptyRoot.querySelector('.doc-placeholder')).not.toBeNull()
    const filledRoot = await load('# 标题\n\n正文')
    expect(filledRoot.querySelector('.doc-placeholder')).toBeNull()
  })
})