'use strict';

const common = require('../common');
const assert = require('assert');
const util = require('util');

util.inspect.defaultOptions.compact = 5;
util.inspect.defaultOptions.breakLength = Infinity;

function expectColored([regexp, expected]) {
  if (!common.hasIntl && !regexp) {
    return;
  }
  const colored = util.inspect(regexp, { colors: true });
  const plain = util.inspect(regexp, { colors: false });
  try {
    assert.strictEqual(util.stripVTControlCharacters(colored), plain);
    assert.strictEqual(colored, expected, `${regexp} failed`);
  } catch (error) {
    console.log('\nInspecting regular expression', colored, '\n');
    throw error;
  }
}

function createRegExp(string, flags) {
  if (common.hasIntl) {
    return new RegExp(string, flags);
  }
}

/* eslint-disable node-core/no-unescaped-regexp-dot */
/* eslint-disable @stylistic/js/max-len */

// Comprehensive set of regexes covering branches in highlightRegExp
const tests = [
  [/a/, '\x1B[32m/\x1B[39m\x1B[33ma\x1B[39m\x1B[32m/\x1B[39m'],
  [/a|b/, '\x1B[32m/\x1B[39m\x1B[33ma\x1B[39m\x1B[35m|\x1B[39m\x1B[33mb\x1B[39m\x1B[32m/\x1B[39m'],
  [/^$/, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m'],
  [/^(?<year>\d{4})-(?<mon>0[1-9]|1[0-2])-(?<day>0[1-9]|[12]\d|3[01])$/u, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33myear\x1B[39m\x1B[31m>\x1B[39m\x1B[36m\\d\x1B[39m\x1B[33m{\x1B[39m\x1B[35m4\x1B[39m\x1B[33m}\x1B[39m\x1B[31m)\x1B[39m\x1B[33m-\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mmon\x1B[39m\x1B[31m>\x1B[39m\x1B[36m0\x1B[39m\x1B[33m[\x1B[39m\x1B[36m1\x1B[39m\x1B[35m-\x1B[39m\x1B[36m9\x1B[39m\x1B[33m]\x1B[39m\x1B[32m|\x1B[39m\x1B[36m1\x1B[39m\x1B[33m[\x1B[39m\x1B[36m0\x1B[39m\x1B[35m-\x1B[39m\x1B[36m2\x1B[39m\x1B[33m]\x1B[39m\x1B[31m)\x1B[39m\x1B[33m-\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mday\x1B[39m\x1B[31m>\x1B[39m\x1B[36m0\x1B[39m\x1B[33m[\x1B[39m\x1B[36m1\x1B[39m\x1B[35m-\x1B[39m\x1B[36m9\x1B[39m\x1B[33m]\x1B[39m\x1B[32m|\x1B[39m\x1B[33m[\x1B[39m\x1B[36m1\x1B[39m\x1B[36m2\x1B[39m\x1B[33m]\x1B[39m\x1B[36m\\d\x1B[39m\x1B[32m|\x1B[39m\x1B[36m3\x1B[39m\x1B[33m[\x1B[39m\x1B[36m0\x1B[39m\x1B[36m1\x1B[39m\x1B[33m]\x1B[39m\x1B[31m)\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m\x1B[31mu\x1B[39m'],
  [/^(?=.*[A-Z])(?=.*\d)(?=.*[^\w\s]).{12,}$/, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?=\x1B[39m\x1B[35m.\x1B[39m\x1B[32m*\x1B[39m\x1B[33m[\x1B[39m\x1B[36mA\x1B[39m\x1B[35m-\x1B[39m\x1B[36mZ\x1B[39m\x1B[33m]\x1B[39m\x1B[31m)\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?=\x1B[39m\x1B[35m.\x1B[39m\x1B[32m*\x1B[39m\x1B[36m\\d\x1B[39m\x1B[31m)\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?=\x1B[39m\x1B[35m.\x1B[39m\x1B[32m*\x1B[39m\x1B[33m[\x1B[39m\x1B[36m^\x1B[39m\x1B[36m\\w\x1B[39m\x1B[36m\\s\x1B[39m\x1B[33m]\x1B[39m\x1B[31m)\x1B[39m\x1B[36m.\x1B[39m\x1B[31m{\x1B[39m\x1B[36m12\x1B[39m\x1B[33m,\x1B[39m\x1B[31m}\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m'],
  [/\b(?<!\$)\d{1,3}(?:,\d{3})*(?:\.\d+)?\b/, '\x1B[32m/\x1B[39m\x1B[33m\\b\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<!\x1B[39m\x1B[36m\\$\x1B[39m\x1B[31m)\x1B[39m\x1B[33m\\d\x1B[39m\x1B[31m{\x1B[39m\x1B[36m1\x1B[39m\x1B[33m,\x1B[39m\x1B[36m3\x1B[39m\x1B[31m}\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[32m,\x1B[39m\x1B[36m\\d\x1B[39m\x1B[33m{\x1B[39m\x1B[35m3\x1B[39m\x1B[33m}\x1B[39m\x1B[31m)\x1B[39m\x1B[35m*\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36m\\.\x1B[39m\x1B[36m\\d\x1B[39m\x1B[32m+\x1B[39m\x1B[31m)\x1B[39m\x1B[35m?\x1B[39m\x1B[33m\\b\x1B[39m\x1B[32m/\x1B[39m'],
  [/\b\w+(?=\s*:\s)/, '\x1B[32m/\x1B[39m\x1B[33m\\b\x1B[39m\x1B[33m\\w\x1B[39m\x1B[35m+\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?=\x1B[39m\x1B[36m\\s\x1B[39m\x1B[32m*\x1B[39m\x1B[36m:\x1B[39m\x1B[36m\\s\x1B[39m\x1B[31m)\x1B[39m\x1B[32m/\x1B[39m'],
  [/^(?:https?:\/\/)?(?:www\.)?[\w.-]+\.[A-Za-z]{2,}(?:\/[^\s?#]*)?(?:\?[^\s#]*)?(?:#[^\s]*)?$/, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36mh\x1B[39m\x1B[36mt\x1B[39m\x1B[36mt\x1B[39m\x1B[36mp\x1B[39m\x1B[36ms\x1B[39m\x1B[32m?\x1B[39m\x1B[36m:\x1B[39m\x1B[36m\\/\x1B[39m\x1B[36m\\/\x1B[39m\x1B[31m)\x1B[39m\x1B[35m?\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36mw\x1B[39m\x1B[36mw\x1B[39m\x1B[36mw\x1B[39m\x1B[36m\\.\x1B[39m\x1B[31m)\x1B[39m\x1B[35m?\x1B[39m\x1B[31m[\x1B[39m\x1B[33m\\w\x1B[39m\x1B[33m.\x1B[39m\x1B[33m-\x1B[39m\x1B[31m]\x1B[39m\x1B[35m+\x1B[39m\x1B[33m\\.\x1B[39m\x1B[31m[\x1B[39m\x1B[33mA\x1B[39m\x1B[36m-\x1B[39m\x1B[33mZ\x1B[39m\x1B[33ma\x1B[39m\x1B[36m-\x1B[39m\x1B[33mz\x1B[39m\x1B[31m]\x1B[39m\x1B[31m{\x1B[39m\x1B[36m2\x1B[39m\x1B[33m,\x1B[39m\x1B[31m}\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36m\\/\x1B[39m\x1B[33m[\x1B[39m\x1B[36m^\x1B[39m\x1B[36m\\s\x1B[39m\x1B[36m?\x1B[39m\x1B[36m#\x1B[39m\x1B[33m]\x1B[39m\x1B[32m*\x1B[39m\x1B[31m)\x1B[39m\x1B[35m?\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36m\\?\x1B[39m\x1B[33m[\x1B[39m\x1B[36m^\x1B[39m\x1B[36m\\s\x1B[39m\x1B[36m#\x1B[39m\x1B[33m]\x1B[39m\x1B[32m*\x1B[39m\x1B[31m)\x1B[39m\x1B[35m?\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36m#\x1B[39m\x1B[33m[\x1B[39m\x1B[36m^\x1B[39m\x1B[36m\\s\x1B[39m\x1B[33m]\x1B[39m\x1B[32m*\x1B[39m\x1B[31m)\x1B[39m\x1B[35m?\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m'],
  [/^(?<ip>(?:25[0-5]|2[0-4]\d|1?\d?\d)(?:\.(?:25[0-5]|2[0-4]\d|1?\d?\d)){3})$/, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mip\x1B[39m\x1B[31m>\x1B[39m\x1B[33m(\x1B[39m\x1B[33m?:\x1B[39m\x1B[35m2\x1B[39m\x1B[35m5\x1B[39m\x1B[36m[\x1B[39m\x1B[35m0\x1B[39m\x1B[32m-\x1B[39m\x1B[35m5\x1B[39m\x1B[36m]\x1B[39m\x1B[31m|\x1B[39m\x1B[35m2\x1B[39m\x1B[36m[\x1B[39m\x1B[35m0\x1B[39m\x1B[32m-\x1B[39m\x1B[35m4\x1B[39m\x1B[36m]\x1B[39m\x1B[35m\\d\x1B[39m\x1B[31m|\x1B[39m\x1B[35m1\x1B[39m\x1B[31m?\x1B[39m\x1B[35m\\d\x1B[39m\x1B[31m?\x1B[39m\x1B[35m\\d\x1B[39m\x1B[33m)\x1B[39m\x1B[33m(\x1B[39m\x1B[33m?:\x1B[39m\x1B[35m\\.\x1B[39m\x1B[36m(\x1B[39m\x1B[36m?:\x1B[39m\x1B[32m2\x1B[39m\x1B[32m5\x1B[39m\x1B[35m[\x1B[39m\x1B[32m0\x1B[39m\x1B[31m-\x1B[39m\x1B[32m5\x1B[39m\x1B[35m]\x1B[39m\x1B[33m|\x1B[39m\x1B[32m2\x1B[39m\x1B[35m[\x1B[39m\x1B[32m0\x1B[39m\x1B[31m-\x1B[39m\x1B[32m4\x1B[39m\x1B[35m]\x1B[39m\x1B[32m\\d\x1B[39m\x1B[33m|\x1B[39m\x1B[32m1\x1B[39m\x1B[33m?\x1B[39m\x1B[32m\\d\x1B[39m\x1B[33m?\x1B[39m\x1B[32m\\d\x1B[39m\x1B[36m)\x1B[39m\x1B[33m)\x1B[39m\x1B[33m{\x1B[39m\x1B[35m3\x1B[39m\x1B[33m}\x1B[39m\x1B[31m)\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m'],
  [/^(?<h>[0-1]?\d|2[0-3]):(?<m>[0-5]\d)(?::(?<s>[0-5]\d))?$/, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mh\x1B[39m\x1B[31m>\x1B[39m\x1B[33m[\x1B[39m\x1B[36m0\x1B[39m\x1B[35m-\x1B[39m\x1B[36m1\x1B[39m\x1B[33m]\x1B[39m\x1B[32m?\x1B[39m\x1B[36m\\d\x1B[39m\x1B[32m|\x1B[39m\x1B[36m2\x1B[39m\x1B[33m[\x1B[39m\x1B[36m0\x1B[39m\x1B[35m-\x1B[39m\x1B[36m3\x1B[39m\x1B[33m]\x1B[39m\x1B[31m)\x1B[39m\x1B[33m:\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mm\x1B[39m\x1B[31m>\x1B[39m\x1B[33m[\x1B[39m\x1B[36m0\x1B[39m\x1B[35m-\x1B[39m\x1B[36m5\x1B[39m\x1B[33m]\x1B[39m\x1B[36m\\d\x1B[39m\x1B[31m)\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36m:\x1B[39m\x1B[33m(\x1B[39m\x1B[33m?<\x1B[39m\x1B[36ms\x1B[39m\x1B[33m>\x1B[39m\x1B[36m[\x1B[39m\x1B[35m0\x1B[39m\x1B[32m-\x1B[39m\x1B[35m5\x1B[39m\x1B[36m]\x1B[39m\x1B[35m\\d\x1B[39m\x1B[33m)\x1B[39m\x1B[31m)\x1B[39m\x1B[35m?\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m'],
  [/^(?:(?!cat).)*$/s, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[33m(\x1B[39m\x1B[33m?!\x1B[39m\x1B[35mc\x1B[39m\x1B[35ma\x1B[39m\x1B[35mt\x1B[39m\x1B[33m)\x1B[39m\x1B[35m.\x1B[39m\x1B[31m)\x1B[39m\x1B[35m*\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m\x1B[31ms\x1B[39m'],
  [/^(?:\+?\d{1,3}[-.\s]?)?(?:\(?\d{2,4}\)?[-.\s]?)?\d{3,4}[-.\s]?\d{3,4}$/, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36m\\+\x1B[39m\x1B[32m?\x1B[39m\x1B[36m\\d\x1B[39m\x1B[33m{\x1B[39m\x1B[35m1\x1B[39m\x1B[36m,\x1B[39m\x1B[35m3\x1B[39m\x1B[33m}\x1B[39m\x1B[33m[\x1B[39m\x1B[36m-\x1B[39m\x1B[36m.\x1B[39m\x1B[36m\\s\x1B[39m\x1B[33m]\x1B[39m\x1B[32m?\x1B[39m\x1B[31m)\x1B[39m\x1B[35m?\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36m\\(\x1B[39m\x1B[32m?\x1B[39m\x1B[36m\\d\x1B[39m\x1B[33m{\x1B[39m\x1B[35m2\x1B[39m\x1B[36m,\x1B[39m\x1B[35m4\x1B[39m\x1B[33m}\x1B[39m\x1B[36m\\)\x1B[39m\x1B[32m?\x1B[39m\x1B[33m[\x1B[39m\x1B[36m-\x1B[39m\x1B[36m.\x1B[39m\x1B[36m\\s\x1B[39m\x1B[33m]\x1B[39m\x1B[32m?\x1B[39m\x1B[31m)\x1B[39m\x1B[35m?\x1B[39m\x1B[33m\\d\x1B[39m\x1B[31m{\x1B[39m\x1B[36m3\x1B[39m\x1B[33m,\x1B[39m\x1B[36m4\x1B[39m\x1B[31m}\x1B[39m\x1B[31m[\x1B[39m\x1B[33m-\x1B[39m\x1B[33m.\x1B[39m\x1B[33m\\s\x1B[39m\x1B[31m]\x1B[39m\x1B[35m?\x1B[39m\x1B[33m\\d\x1B[39m\x1B[31m{\x1B[39m\x1B[36m3\x1B[39m\x1B[33m,\x1B[39m\x1B[36m4\x1B[39m\x1B[31m}\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m'],
  [/\b(0[xX])(?<hex>[0-9A-Fa-f]+)\b/, '\x1B[32m/\x1B[39m\x1B[33m\\b\x1B[39m\x1B[31m(\x1B[39m\x1B[36m0\x1B[39m\x1B[33m[\x1B[39m\x1B[36mx\x1B[39m\x1B[36mX\x1B[39m\x1B[33m]\x1B[39m\x1B[31m)\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mhex\x1B[39m\x1B[31m>\x1B[39m\x1B[33m[\x1B[39m\x1B[36m0\x1B[39m\x1B[35m-\x1B[39m\x1B[36m9\x1B[39m\x1B[36mA\x1B[39m\x1B[35m-\x1B[39m\x1B[36mF\x1B[39m\x1B[36ma\x1B[39m\x1B[35m-\x1B[39m\x1B[36mf\x1B[39m\x1B[33m]\x1B[39m\x1B[32m+\x1B[39m\x1B[31m)\x1B[39m\x1B[33m\\b\x1B[39m\x1B[32m/\x1B[39m'],
  [/\b(?<num>\d+)\.(?<frac>\d+)\b/, '\x1B[32m/\x1B[39m\x1B[33m\\b\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mnum\x1B[39m\x1B[31m>\x1B[39m\x1B[36m\\d\x1B[39m\x1B[32m+\x1B[39m\x1B[31m)\x1B[39m\x1B[33m\\.\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mfrac\x1B[39m\x1B[31m>\x1B[39m\x1B[36m\\d\x1B[39m\x1B[32m+\x1B[39m\x1B[31m)\x1B[39m\x1B[33m\\b\x1B[39m\x1B[32m/\x1B[39m'],
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  [/^([A-Za-z]\w*)(?:\s*,\s*\1)*$/, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[33m[\x1B[39m\x1B[36mA\x1B[39m\x1B[35m-\x1B[39m\x1B[36mZ\x1B[39m\x1B[36ma\x1B[39m\x1B[35m-\x1B[39m\x1B[36mz\x1B[39m\x1B[33m]\x1B[39m\x1B[36m\\w\x1B[39m\x1B[32m*\x1B[39m\x1B[31m)\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36m\\s\x1B[39m\x1B[32m*\x1B[39m\x1B[32m,\x1B[39m\x1B[36m\\s\x1B[39m\x1B[32m*\x1B[39m\x1B[36m\\1\x1B[39m\x1B[31m)\x1B[39m\x1B[35m*\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m'],
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  [/^(?<lhs>\w+)\s*(?<op>\+=|-=|\*\*=|<<=)\s*(?<rhs>[^;]+);$/, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mlhs\x1B[39m\x1B[31m>\x1B[39m\x1B[36m\\w\x1B[39m\x1B[32m+\x1B[39m\x1B[31m)\x1B[39m\x1B[33m\\s\x1B[39m\x1B[35m*\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mop\x1B[39m\x1B[31m>\x1B[39m\x1B[36m\\+\x1B[39m\x1B[36m=\x1B[39m\x1B[32m|\x1B[39m\x1B[36m-\x1B[39m\x1B[36m=\x1B[39m\x1B[32m|\x1B[39m\x1B[36m\\*\x1B[39m\x1B[36m\\*\x1B[39m\x1B[36m=\x1B[39m\x1B[32m|\x1B[39m\x1B[36m<\x1B[39m\x1B[36m<\x1B[39m\x1B[36m=\x1B[39m\x1B[31m)\x1B[39m\x1B[33m\\s\x1B[39m\x1B[35m*\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mrhs\x1B[39m\x1B[31m>\x1B[39m\x1B[33m[\x1B[39m\x1B[36m^\x1B[39m\x1B[36m;\x1B[39m\x1B[33m]\x1B[39m\x1B[32m+\x1B[39m\x1B[31m)\x1B[39m\x1B[33m;\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m'],
  [/^(?<scheme>[a-z][a-z0-9+-.]*):(?<rest>\/\/[^?#\s]+(?:\?[^#\s]*)?(?:#[^\s]*)?|[^/\s][^\s]*)$/i, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mscheme\x1B[39m\x1B[31m>\x1B[39m\x1B[33m[\x1B[39m\x1B[36ma\x1B[39m\x1B[35m-\x1B[39m\x1B[36mz\x1B[39m\x1B[33m]\x1B[39m\x1B[33m[\x1B[39m\x1B[36ma\x1B[39m\x1B[35m-\x1B[39m\x1B[36mz\x1B[39m\x1B[36m0\x1B[39m\x1B[35m-\x1B[39m\x1B[36m9\x1B[39m\x1B[36m+\x1B[39m\x1B[35m-\x1B[39m\x1B[36m.\x1B[39m\x1B[33m]\x1B[39m\x1B[32m*\x1B[39m\x1B[31m)\x1B[39m\x1B[33m:\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mrest\x1B[39m\x1B[31m>\x1B[39m\x1B[36m\\/\x1B[39m\x1B[36m\\/\x1B[39m\x1B[33m[\x1B[39m\x1B[36m^\x1B[39m\x1B[36m?\x1B[39m\x1B[36m#\x1B[39m\x1B[36m\\s\x1B[39m\x1B[33m]\x1B[39m\x1B[32m+\x1B[39m\x1B[33m(\x1B[39m\x1B[33m?:\x1B[39m\x1B[35m\\?\x1B[39m\x1B[36m[\x1B[39m\x1B[35m^\x1B[39m\x1B[35m#\x1B[39m\x1B[35m\\s\x1B[39m\x1B[36m]\x1B[39m\x1B[31m*\x1B[39m\x1B[33m)\x1B[39m\x1B[32m?\x1B[39m\x1B[33m(\x1B[39m\x1B[33m?:\x1B[39m\x1B[35m#\x1B[39m\x1B[36m[\x1B[39m\x1B[35m^\x1B[39m\x1B[35m\\s\x1B[39m\x1B[36m]\x1B[39m\x1B[31m*\x1B[39m\x1B[33m)\x1B[39m\x1B[32m?\x1B[39m\x1B[32m|\x1B[39m\x1B[33m[\x1B[39m\x1B[36m^\x1B[39m\x1B[36m/\x1B[39m\x1B[36m\\s\x1B[39m\x1B[33m]\x1B[39m\x1B[33m[\x1B[39m\x1B[36m^\x1B[39m\x1B[36m\\s\x1B[39m\x1B[33m]\x1B[39m\x1B[32m*\x1B[39m\x1B[31m)\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m\x1B[31mi\x1B[39m'],
  [createRegExp('^(?:[\\p{Letter}\\p{Mark}\\p{Number}._-]+)@(?:[\\p{Letter}\\p{Number}\\p{Mark}.-]+)\\.[\\p{Letter}]{2,}$', 'u'), '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[33m[\x1B[39m\x1B[36m\\p{\x1B[39m\x1B[35mLetter\x1B[39m\x1B[36m}\x1B[39m\x1B[36m\\p{\x1B[39m\x1B[35mMark\x1B[39m\x1B[36m}\x1B[39m\x1B[36m\\p{\x1B[39m\x1B[35mNumber\x1B[39m\x1B[36m}\x1B[39m\x1B[36m.\x1B[39m\x1B[36m_\x1B[39m\x1B[36m-\x1B[39m\x1B[33m]\x1B[39m\x1B[32m+\x1B[39m\x1B[31m)\x1B[39m\x1B[33m@\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[33m[\x1B[39m\x1B[36m\\p{\x1B[39m\x1B[35mLetter\x1B[39m\x1B[36m}\x1B[39m\x1B[36m\\p{\x1B[39m\x1B[35mNumber\x1B[39m\x1B[36m}\x1B[39m\x1B[36m\\p{\x1B[39m\x1B[35mMark\x1B[39m\x1B[36m}\x1B[39m\x1B[36m.\x1B[39m\x1B[36m-\x1B[39m\x1B[33m]\x1B[39m\x1B[32m+\x1B[39m\x1B[31m)\x1B[39m\x1B[33m\\.\x1B[39m\x1B[31m[\x1B[39m\x1B[33m\\p{\x1B[39m\x1B[36mLetter\x1B[39m\x1B[33m}\x1B[39m\x1B[31m]\x1B[39m\x1B[31m{\x1B[39m\x1B[36m2\x1B[39m\x1B[33m,\x1B[39m\x1B[31m}\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m\x1B[31mu\x1B[39m'],
  [createRegExp('^[\\p{Alphabetic}&&\\p{ASCII}]+$', 'v'), '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[31m[\x1B[39m\x1B[33m\\p{\x1B[39m\x1B[36mAlphabetic\x1B[39m\x1B[33m}\x1B[39m\x1B[33m&\x1B[39m\x1B[33m&\x1B[39m\x1B[33m\\p{\x1B[39m\x1B[36mASCII\x1B[39m\x1B[33m}\x1B[39m\x1B[31m]\x1B[39m\x1B[35m+\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m\x1B[31mv\x1B[39m'],
  [/(a)/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[36ma\x1B[39m\x1B[31m)\x1B[39m\x1B[32m/\x1B[39m'],
  [/(?:a)/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36ma\x1B[39m\x1B[31m)\x1B[39m\x1B[32m/\x1B[39m'],
  [/(?=a)/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?=\x1B[39m\x1B[36ma\x1B[39m\x1B[31m)\x1B[39m\x1B[32m/\x1B[39m'],
  [/(?!a)/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?!\x1B[39m\x1B[36ma\x1B[39m\x1B[31m)\x1B[39m\x1B[32m/\x1B[39m'],
  [/(?<=a)/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<=\x1B[39m\x1B[36ma\x1B[39m\x1B[31m)\x1B[39m\x1B[32m/\x1B[39m'],
  [/(?<!a)/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<!\x1B[39m\x1B[36ma\x1B[39m\x1B[31m)\x1B[39m\x1B[32m/\x1B[39m'],
  [/(?<name>a)/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mname\x1B[39m\x1B[31m>\x1B[39m\x1B[36ma\x1B[39m\x1B[31m)\x1B[39m\x1B[32m/\x1B[39m'],
  [/(?<name>a)\k<name>/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mname\x1B[39m\x1B[31m>\x1B[39m\x1B[36ma\x1B[39m\x1B[31m)\x1B[39m\x1B[32m\\k<\x1B[39m\x1B[31mname\x1B[39m\x1B[32m>\x1B[39m\x1B[32m/\x1B[39m'],
  [createRegExp('\\p{Letter}+', 'u'), '\x1B[32m/\x1B[39m\x1B[31m\\p{\x1B[39m\x1B[33mLetter\x1B[39m\x1B[31m}\x1B[39m\x1B[35m+\x1B[39m\x1B[32m/\x1B[39m\x1B[31mu\x1B[39m'],
  [/[\u{1F600}-\u{1F601}]/u, '\x1B[32m/\x1B[39m\x1B[31m[\x1B[39m\x1B[33m\\u{\x1B[39m\x1B[36m1F600\x1B[39m\x1B[33m}\x1B[39m\x1B[36m-\x1B[39m\x1B[33m\\u{\x1B[39m\x1B[36m1F601\x1B[39m\x1B[33m}\x1B[39m\x1B[31m]\x1B[39m\x1B[32m/\x1B[39m\x1B[31mu\x1B[39m'],
  [/\x61/, '\x1B[32m/\x1B[39m\x1B[33m\\x61\x1B[39m\x1B[32m/\x1B[39m'],
  [/\u{1F600}/u, '\x1B[32m/\x1B[39m\x1B[31m\\u{\x1B[39m\x1B[33m1F600\x1B[39m\x1B[31m}\x1B[39m\x1B[32m/\x1B[39m\x1B[31mu\x1B[39m'],
  [/[a-z-]/, '\x1B[32m/\x1B[39m\x1B[31m[\x1B[39m\x1B[33ma\x1B[39m\x1B[36m-\x1B[39m\x1B[33mz\x1B[39m\x1B[33m-\x1B[39m\x1B[31m]\x1B[39m\x1B[32m/\x1B[39m'],
  [/[a-z-]/, '\x1B[32m/\x1B[39m\x1B[31m[\x1B[39m\x1B[33ma\x1B[39m\x1B[36m-\x1B[39m\x1B[33mz\x1B[39m\x1B[33m-\x1B[39m\x1B[31m]\x1B[39m\x1B[32m/\x1B[39m'],
  [/.{2,3}?abc?/, '\x1B[32m/\x1B[39m\x1B[36m.\x1B[39m\x1B[31m{\x1B[39m\x1B[36m2\x1B[39m\x1B[33m,\x1B[39m\x1B[36m3\x1B[39m\x1B[31m}\x1B[39m\x1B[35m?\x1B[39m\x1B[33ma\x1B[39m\x1B[33mb\x1B[39m\x1B[33mc\x1B[39m\x1B[35m?\x1B[39m\x1B[32m/\x1B[39m'],
  [/a{2}/, '\x1B[32m/\x1B[39m\x1B[33ma\x1B[39m\x1B[31m{\x1B[39m\x1B[36m2\x1B[39m\x1B[31m}\x1B[39m\x1B[32m/\x1B[39m'],
  [/\d/, '\x1B[32m/\x1B[39m\x1B[33m\\d\x1B[39m\x1B[32m/\x1B[39m'],
  [/[^a-z\d\u{1F600}-\u{1F601}]/u, '\x1B[32m/\x1B[39m\x1B[31m[\x1B[39m\x1B[33m^\x1B[39m\x1B[33ma\x1B[39m\x1B[36m-\x1B[39m\x1B[33mz\x1B[39m\x1B[33m\\d\x1B[39m\x1B[33m\\u{\x1B[39m\x1B[36m1F600\x1B[39m\x1B[33m}\x1B[39m\x1B[36m-\x1B[39m\x1B[33m\\u{\x1B[39m\x1B[36m1F601\x1B[39m\x1B[33m}\x1B[39m\x1B[31m]\x1B[39m\x1B[32m/\x1B[39m\x1B[31mu\x1B[39m'],
  [/(?<year>\d{4})-\d{2}|\d{2}-(?<year>\d{4})/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33myear\x1B[39m\x1B[31m>\x1B[39m\x1B[36m\\d\x1B[39m\x1B[33m{\x1B[39m\x1B[35m4\x1B[39m\x1B[33m}\x1B[39m\x1B[31m)\x1B[39m\x1B[33m-\x1B[39m\x1B[33m\\d\x1B[39m\x1B[31m{\x1B[39m\x1B[36m2\x1B[39m\x1B[31m}\x1B[39m\x1B[35m|\x1B[39m\x1B[33m\\d\x1B[39m\x1B[31m{\x1B[39m\x1B[36m2\x1B[39m\x1B[31m}\x1B[39m\x1B[33m-\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33myear\x1B[39m\x1B[31m>\x1B[39m\x1B[36m\\d\x1B[39m\x1B[33m{\x1B[39m\x1B[35m4\x1B[39m\x1B[33m}\x1B[39m\x1B[31m)\x1B[39m\x1B[32m/\x1B[39m'],
  [/(?<=Mr\.|Mrs.)\s[A-Z]\w+/, '\x1B[32m/\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<=\x1B[39m\x1B[36mM\x1B[39m\x1B[36mr\x1B[39m\x1B[36m\\.\x1B[39m\x1B[32m|\x1B[39m\x1B[36mM\x1B[39m\x1B[36mr\x1B[39m\x1B[36ms\x1B[39m\x1B[35m.\x1B[39m\x1B[31m)\x1B[39m\x1B[33m\\s\x1B[39m\x1B[31m[\x1B[39m\x1B[33mA\x1B[39m\x1B[36m-\x1B[39m\x1B[33mZ\x1B[39m\x1B[31m]\x1B[39m\x1B[33m\\w\x1B[39m\x1B[35m+\x1B[39m\x1B[32m/\x1B[39m'],
  [/a/giu, '\x1B[32m/\x1B[39m\x1B[33ma\x1B[39m\x1B[32m/\x1B[39m\x1B[31mgiu\x1B[39m'],
  [/\p{Let(?<quote>["'])(?:\.|(?!\k<quote>)[\s\S])*\k<quote>$/, `\x1B[32m/\x1B[39m\x1B[33m\\p{\x1B[39m\x1B[33mL\x1B[39m\x1B[33me\x1B[39m\x1B[33mt\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?<\x1B[39m\x1B[33mquote\x1B[39m\x1B[31m>\x1B[39m\x1B[33m[\x1B[39m\x1B[36m"\x1B[39m\x1B[36m'\x1B[39m\x1B[33m]\x1B[39m\x1B[31m)\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36m\\.\x1B[39m\x1B[32m|\x1B[39m\x1B[33m(\x1B[39m\x1B[33m?!\x1B[39m\x1B[33m\\k<\x1B[39m\x1B[36mquote\x1B[39m\x1B[33m>\x1B[39m\x1B[33m)\x1B[39m\x1B[33m[\x1B[39m\x1B[36m\\s\x1B[39m\x1B[36m\\S\x1B[39m\x1B[33m]\x1B[39m\x1B[31m)\x1B[39m\x1B[35m*\x1B[39m\x1B[32m\\k<\x1B[39m\x1B[31mquote\x1B[39m\x1B[32m>\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m`],
  [/^p{Lu}p{Ll}+(?:sp{Lu}p{Ll}+)+$/, '\x1B[32m/\x1B[39m\x1B[35m^\x1B[39m\x1B[33mp\x1B[39m\x1B[33m{\x1B[39m\x1B[33mL\x1B[39m\x1B[33mu\x1B[39m\x1B[33m}\x1B[39m\x1B[33mp\x1B[39m\x1B[33m{\x1B[39m\x1B[33mL\x1B[39m\x1B[33ml\x1B[39m\x1B[33m}\x1B[39m\x1B[35m+\x1B[39m\x1B[31m(\x1B[39m\x1B[31m?:\x1B[39m\x1B[36ms\x1B[39m\x1B[36mp\x1B[39m\x1B[36m{\x1B[39m\x1B[36mL\x1B[39m\x1B[36mu\x1B[39m\x1B[36m}\x1B[39m\x1B[36mp\x1B[39m\x1B[36m{\x1B[39m\x1B[36mL\x1B[39m\x1B[36ml\x1B[39m\x1B[36m}\x1B[39m\x1B[32m+\x1B[39m\x1B[31m)\x1B[39m\x1B[35m+\x1B[39m\x1B[35m$\x1B[39m\x1B[32m/\x1B[39m'],
];

for (const test of tests) {
  expectColored(test);
}

// These test cases do not highlight the regular expression correctly.
const brokenTests = [
  [/\p{Let(?<quote>["'])(?:\.|\p{quote}[\s\S])*\k<quote>$/, `\x1B[32m/\x1B[39m\x1B[31m\\p{\x1B[39m\x1B[33mLet(?<quote>["'])(?:\\.|\\p{quote\x1B[39m\x1B[31m}\x1B[39m\x1B[31m[\x1B[39m\x1B[33m\\s\x1B[39m\x1B[33m\\S\x1B[39m\x1B[31m]\x1B[39m\x1B[32m)\x1B[39m\x1B[36m*\x1B[39m\x1B[32m\\k<\x1B[39m\x1B[32mquote\x1B[39m\x1B[32m>\x1B[39m\x1B[36m$\x1B[39m\x1B[32m/\x1B[39m`],
];

for (const test of brokenTests) {
  expectColored(test);
}

{
  const regexp = /(?<year>\d{4})-\d{2}|\d{2}-(?<year>\d{4})/;
  const regular = util.inspect(regexp, { colors: true });

  util.inspect.styles.regexp.colors = [];
  const emptyColorArray = util.inspect(regexp, { colors: true });

  assert.strictEqual(emptyColorArray, regular);

  util.inspect.styles.regexp.colors = undefined;
  const undefinedColors = util.inspect(regexp, { colors: true });

  assert.strictEqual(undefinedColors, regular);

  util.inspect.styles.regexp.colors = ['red', 'yellow', 'cyan'];
  const customColors = util.inspect(regexp, { colors: true });

  assert.strictEqual(
    customColors,
    '\x1B[31m/\x1B[39m\x1B[33m(\x1B[39m\x1B[33m?<\x1B[39m\x1B[36myear\x1B[39m\x1B[33m>\x1B[39m\x1B[31m\\d\x1B[39m\x1B[36m{\x1B[39m\x1B[33m4\x1B[39m\x1B[36m}\x1B[39m\x1B[33m)\x1B[39m\x1B[36m-\x1B[39m\x1B[36m\\d\x1B[39m\x1B[33m{\x1B[39m\x1B[31m2\x1B[39m\x1B[33m}\x1B[39m\x1B[33m|\x1B[39m\x1B[36m\\d\x1B[39m\x1B[33m{\x1B[39m\x1B[31m2\x1B[39m\x1B[33m}\x1B[39m\x1B[36m-\x1B[39m\x1B[33m(\x1B[39m\x1B[33m?<\x1B[39m\x1B[36myear\x1B[39m\x1B[33m>\x1B[39m\x1B[31m\\d\x1B[39m\x1B[36m{\x1B[39m\x1B[33m4\x1B[39m\x1B[36m}\x1B[39m\x1B[33m)\x1B[39m\x1B[31m/\x1B[39m'
  );

  util.inspect.styles.regexp = 'red';
  const redStyle = util.inspect(regexp, { colors: true });

  assert.strictEqual(redStyle, '\x1B[31m/(?<year>\\d{4})-\\d{2}|\\d{2}-(?<year>\\d{4})/\x1B[39m');
}