text.test.ts

import { decodeUtf8, hex, uint8Array, uint8ArrayToHex } from '../src/text'

describe('text', () => {
  describe('decodeUtf8', () => {
    test('decodes ascii bytes', () => {
      expect(decodeUtf8('a')).toEqual('a')
    })

    test('decodes empty string', () => {
      expect(decodeUtf8('')).toEqual('')
    })

    test('decodes null value', () => {
      expect(decodeUtf8(null)).toEqual('')
    })

    test('decodes undefined value', () => {
      expect(decodeUtf8(undefined)).toEqual('')
    })

    test('decodes multi-byte characters', () => {
      expect(decodeUtf8('\xF0\x9F\xA4\x94')).toEqual('🤔')
    })
  })

  describe('hex', () => {
    test('encodes binary as hex', () => {
      expect(hex('\0\0')).toEqual('0x0000')
    })

    test('encodes ascii as hex', () => {
      expect(hex('aa')).toEqual('0x6161')
    })
  })

  describe('uint8Array', () => {
    test('converts to an array of 8-bit unsigned integers', () => {
      expect(uint8Array('')).toEqual(new Uint8Array([]))
      expect(uint8Array('Å')).toEqual(new Uint8Array([197]))
    })
  })

  describe('uint8ArrayToHex', () => {
    test('converts an array of 8-bit unsigned integers to hex', () => {
      expect(uint8ArrayToHex(new Uint8Array([]))).toEqual("x''")
      expect(uint8ArrayToHex(new Uint8Array([197]))).toEqual("x'c5'")
    })
  })
})