// Flags: --expose-internals
'use strict';

// This tests internal mapping of the Node.js encoding implementation

require('../common');

const assert = require('assert');
const { getEncodingFromLabel } = require('internal/encoding');

// Test Encoding Mappings
{
  const mappings = {
    'utf-8': [
      'unicode-1-1-utf-8',
      'unicode11utf8',
      'unicode20utf8',
      'utf8',
      'x-unicode20utf8',
    ],
    'utf-16be': [
      'unicodefffe',
    ],
    'utf-16le': [
      'csunicode',
      'iso-10646-ucs-2',
      'ucs-2',
      'unicode',
      'unicodefeff',
      'utf-16',
    ],
    'ibm866': [
      '866',
      'cp866',
      'csibm866',
    ],
    'iso-8859-2': [
      'csisolatin2',
      'iso-ir-101',
      'iso8859-2',
      'iso88592',
      'iso_8859-2',
      'iso_8859-2:1987',
      'l2',
      'latin2',
    ],
    'iso-8859-3': [
      'csisolatin3',
      'iso-ir-109',
      'iso8859-3',
      'iso88593',
      'iso_8859-3',
      'iso_8859-3:1988',
      'l3',
      'latin3',
    ],
    'iso-8859-4': [
      'csisolatin4',
      'iso-ir-110',
      'iso8859-4',
      'iso88594',
      'iso_8859-4',
      'iso_8859-4:1988',
      'l4',
      'latin4',
    ],
    'iso-8859-5': [
      'csisolatincyrillic',
      'cyrillic',
      'iso-ir-144',
      'iso8859-5',
      'iso88595',
      'iso_8859-5',
      'iso_8859-5:1988',
    ],
    'iso-8859-6': [
      'arabic',
      'asmo-708',
      'csiso88596e',
      'csiso88596i',
      'csisolatinarabic',
      'ecma-114',
      'iso-8859-6-e',
      'iso-8859-6-i',
      'iso-ir-127',
      'iso8859-6',
      'iso88596',
      'iso_8859-6',
      'iso_8859-6:1987',
    ],
    'iso-8859-7': [
      'csisolatingreek',
      'ecma-118',
      'elot_928',
      'greek',
      'greek8',
      'iso-ir-126',
      'iso8859-7',
      'iso88597',
      'iso_8859-7',
      'iso_8859-7:1987',
      'sun_eu_greek',
    ],
    'iso-8859-8': [
      'csiso88598e',
      'csisolatinhebrew',
      'hebrew',
      'iso-8859-8-e',
      'iso-ir-138',
      'iso8859-8',
      'iso88598',
      'iso_8859-8',
      'iso_8859-8:1988',
      'visual',
    ],
    'iso-8859-8-i': [
      'csiso88598i',
      'logical',
    ],
    'iso-8859-10': [
      'csisolatin6',
      'iso-ir-157',
      'iso8859-10',
      'iso885910',
      'l6',
      'latin6',
    ],
    'iso-8859-13': [
      'iso8859-13',
      'iso885913',
    ],
    'iso-8859-14': [
      'iso8859-14',
      'iso885914',
    ],
    'iso-8859-15': [
      'csisolatin9',
      'iso8859-15',
      'iso885915',
      'iso_8859-15',
      'l9',
    ],
    'koi8-r': [
      'cskoi8r',
      'koi',
      'koi8',
      'koi8_r',
    ],
    'koi8-u': [
      'koi8-ru',
    ],
    'macintosh': [
      'csmacintosh',
      'mac',
      'x-mac-roman',
    ],
    'windows-874': [
      'dos-874',
      'iso-8859-11',
      'iso8859-11',
      'iso885911',
      'tis-620',
    ],
    'windows-1250': [
      'cp1250',
      'x-cp1250',
    ],
    'windows-1251': [
      'cp1251',
      'x-cp1251',
    ],
    'windows-1252': [
      'ansi_x3.4-1968',
      'ascii',
      'cp1252',
      'cp819',
      'csisolatin1',
      'ibm819',
      'iso-8859-1',
      'iso-ir-100',
      'iso8859-1',
      'iso88591',
      'iso_8859-1',
      'iso_8859-1:1987',
      'l1',
      'latin1',
      'us-ascii',
      'x-cp1252',
    ],
    'windows-1253': [
      'cp1253',
      'x-cp1253',
    ],
    'windows-1254': [
      'cp1254',
      'csisolatin5',
      'iso-8859-9',
      'iso-ir-148',
      'iso8859-9',
      'iso88599',
      'iso_8859-9',
      'iso_8859-9:1989',
      'l5',
      'latin5',
      'x-cp1254',
    ],
    'windows-1255': [
      'cp1255',
      'x-cp1255',
    ],
    'windows-1256': [
      'cp1256',
      'x-cp1256',
    ],
    'windows-1257': [
      'cp1257',
      'x-cp1257',
    ],
    'windows-1258': [
      'cp1258',
      'x-cp1258',
    ],
    'x-mac-cyrillic': [
      'x-mac-ukrainian',
    ],
    'gbk': [
      'chinese',
      'csgb2312',
      'csiso58gb231280',
      'gb2312',
      'gb_2312',
      'gb_2312-80',
      'iso-ir-58',
      'x-gbk',
    ],
    'gb18030': [ ],
    'big5': [
      'big5-hkscs',
      'cn-big5',
      'csbig5',
      'x-x-big5',
    ],
    'euc-jp': [
      'cseucpkdfmtjapanese',
      'x-euc-jp',
    ],
    'iso-2022-jp': [
      'csiso2022jp',
    ],
    'shift_jis': [
      'csshiftjis',
      'ms932',
      'ms_kanji',
      'shift-jis',
      'sjis',
      'windows-31j',
      'x-sjis',
    ],
    'euc-kr': [
      '  euc-kr  \t',
      'EUC-kr  \n',
      'cseuckr',
      'csksc56011987',
      'iso-ir-149',
      'korean',
      'ks_c_5601-1987',
      'ks_c_5601-1989',
      'ksc5601',
      'ksc_5601',
      'windows-949',
    ],
    'replacement': [
      'csiso2022kr',
      'hz-gb-2312',
      'iso-2022-cn',
      'iso-2022-cn-ext',
      'iso-2022-kr',
    ],
    'x-user-defined': []
  };
  Object.entries(mappings).forEach((i) => {
    const enc = i[0];
    const labels = i[1];
    assert.strictEqual(getEncodingFromLabel(enc), enc);
    labels.forEach((l) => assert.strictEqual(getEncodingFromLabel(l), enc));
  });

  assert.strictEqual(getEncodingFromLabel('made-up'), undefined);
}