import {
  normalizeMaterialPreviewUrl,
  pickFirstMaterialPreviewUrl,
} from '@/lib/material-preview-url'

describe('material-preview-url', () => {
  test('URL 字段只保留非空字符串', () => {
    expect(normalizeMaterialPreviewUrl('/uploads/preview.webp')).toBe('/uploads/preview.webp')
    expect(normalizeMaterialPreviewUrl('  https://cdn.example.com/cover.jpg  '))
      .toBe('https://cdn.example.com/cover.jpg')
    expect(normalizeMaterialPreviewUrl(true)).toBeNull()
    expect(normalizeMaterialPreviewUrl(false)).toBeNull()
    expect(normalizeMaterialPreviewUrl(null)).toBeNull()
    expect(normalizeMaterialPreviewUrl(1)).toBeNull()
    expect(normalizeMaterialPreviewUrl({ url: '/not-a-string.jpg' })).toBeNull()
    expect(normalizeMaterialPreviewUrl('   ')).toBeNull()
  })

  test('合法相对地址和带签名的绝对地址保持兼容', () => {
    const signedUrl = 'https://cdn.example.com/preview.webp?token=a%2Bb&expires=999'
    expect(normalizeMaterialPreviewUrl('/uploads/preview.webp')).toBe('/uploads/preview.webp')
    expect(normalizeMaterialPreviewUrl(signedUrl)).toBe(signedUrl)
  })

  test('异常布尔值或空值不会挡住后续合法预览图', () => {
    expect(pickFirstMaterialPreviewUrl(
      true,
      null,
      '',
      ' /uploads/from-display-images.webp ',
    )).toBe('/uploads/from-display-images.webp')
  })
})