// 空态点工件无反应（2026-10-10 实测复现）：requestPreview 写 '_' 键、渲染判
// currentConvId 非空——键口径不一致导致空态点击只剩弹层关闭。这里测纯函数口径。
import { describe, expect, it } from 'vitest'
import { mergeOrphanPreviewTabs, previewTabsKey } from '../src/previewtabs'

describe('previewTabsKey', () => {
  it('falls back to the empty-state key when no conversation is selected', () => {
    expect(previewTabsKey(null)).toBe('_')
    expect(previewTabsKey(undefined)).toBe('_')
    expect(previewTabsKey('cnv_1')).toBe('cnv_1')
  })
})

describe('mergeOrphanPreviewTabs', () => {
  it('merges empty-state tabs into the conversation key and clears the orphan key', () => {
    const got = mergeOrphanPreviewTabs({
      _: [{ id: 'a', name: 'A.docx' }, { id: 'b', name: 'B.md' }],
      cnv_1: [{ id: 'b', name: 'B.md' }],
    }, 'cnv_1')
    expect(got._).toEqual([])
    expect(got.cnv_1.map(t => t.id)).toEqual(['b', 'a'])
  })

  it('returns the input untouched when there is no orphan or the target is the orphan key', () => {
    const none = { cnv_1: [{ id: 'a', name: 'A' }] }
    expect(mergeOrphanPreviewTabs(none, 'cnv_1')).toBe(none)
    const self = { _: [{ id: 'a', name: 'A' }] }
    expect(mergeOrphanPreviewTabs(self, '_')).toBe(self)
  })
})