import { describe, expect, it } from 'vitest'
import { utf8LenCompute, utf8LenNode } from './utf8-len.js'

for (const utf8Len of [utf8LenNode!, utf8LenCompute!] as const) {
  describe(utf8Len, () => {
    it('computes utf8 string length', () => {
      expect(utf8Len('a')).toBe(1)
      expect(utf8Len('~')).toBe(1)
      expect(utf8Len('ö')).toBe(2)
      expect(utf8Len('ñ')).toBe(2)
      expect(utf8Len('©')).toBe(2)
      expect(utf8Len('⽘')).toBe(3)
      expect(utf8Len('☎')).toBe(3)
      expect(utf8Len('𓋓')).toBe(4)
      expect(utf8Len('😀')).toBe(4)
      expect(utf8Len('👨‍👩‍👧‍👧')).toBe(25)
      // high surrogate with no low surrogate
      expect(utf8Len('\uD83D')).toBe(3)
      // low surrogate with no high surrogate
      expect(utf8Len('\uDC00')).toBe(3)
    })
  })
}