import { describe, test, expect, Result } from './tests.uts'

export function testDecoder() : Result {
  return describe("TextDecoder", () => {
    test('decoder', () => {
      // #TEST TextDecoder.decode
      var utf8decoder = new TextDecoder(); // default 'utf-8' or 'utf8'

      var u8arr = Uint8Array.of(240, 160, 174, 183);
      var i8arr = Int8Array.of(-16, -96, -82, -73);

      expect(utf8decoder.decode(u8arr)).toEqual('𠮷')
      expect(utf8decoder.decode(i8arr)).toEqual('𠮷')

      utf8decoder = new TextDecoder("gbk"); // default 'utf-8' or 'utf8'
      expect(utf8decoder.decode(u8arr)).toEqual('馉');
      expect(utf8decoder.decode(i8arr)).toEqual('馉')

      utf8decoder = new TextDecoder("utf-8");
      var arraybuffer = new ArrayBuffer(4)
      var dataView = new DataView(arraybuffer)
      dataView.setInt8(0, -16)
      dataView.setInt8(1, -96)
      dataView.setInt8(2, -82)
      dataView.setInt8(3, -73)
      expect(utf8decoder.decode(dataView)).toEqual('𠮷');

      // #END
    })
  })
}