text: /**
   * Alphanumeric characters.
   * @const
   */
  const ALPHANUM = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
  /**
   * Hexadecimal digit characters.
   * @const
   */
  
  const HEX_DIGITS = '0123456789abcdef';
  /**
   * Generate a string with random alphanumeric characters with a specific length.
   *
   * @param {number} length - The length of the string to return.
   * @returns {string} A string of random alphanumeric characters with the
   * specified length.
   */
  
  export function randomAlphanumString(length) {
    return _randomString(length, ALPHANUM);
  }
  /**
   * Get random element of array or string.
   *
   * @param {Array|string} arr - Source.
   * @returns {Array|string} Array element or string character.
   */
  
  export function randomElement(arr) {
    return arr[randomInt(0, arr.length - 1)];
  }
  /**
   * Returns a random hex digit.
   *
   * @returns {Array|string}
   */
  
  export function randomHexDigit() {
    return randomElement(HEX_DIGITS);
  }
  /**
   * Generates a string of random hexadecimal digits with a specific length.
   *
   * @param {number} length - The length of the string to return.
   * @returns {string} A string of random hexadecimal digits with the specified
   * length.
   */
  
  export function randomHexString(length) {
    return _randomString(length, HEX_DIGITS);
  }
  /**
   * Generates random int within the range [min, max].
   *
   * @param {number} min - The minimum value for the generated number.
   * @param {number} max - The maximum value for the generated number.
   * @returns {number} Random int number.
   */
  
  export function randomInt(min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
  }
  /**
   * Generates a string of random characters with a specific length.
   *
   * @param {number} length - The length of the string to return.
   * @param {string} characters - The characters from which the returned string is
   * to be constructed.
   * @private
   * @returns {string} A string of random characters with the specified length.
   */
  
  function _randomString(length, characters) {
    let result = '';
  
    for (let i = 0; i < length; ++i) {
      result += randomElement(characters);
    }
  
    return result;
  }