text: import toInteger from '../_lib/toInteger/index.js'
  import addMilliseconds from '../addMilliseconds/index.js'
  import requiredArgs from '../_lib/requiredArgs/index.js'
  
  var MILLISECONDS_IN_HOUR = 3600000
  
  /**
   * @name addHours
   * @category Hour Helpers
   * @summary Add the specified number of hours to the given date.
   *
   * @description
   * Add the specified number of hours to the given date.
   *
   * ### v2.0.0 breaking changes:
   *
   * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
   *
   * @param {Date|Number} date - the date to be changed
   * @param {Number} amount - the amount of hours to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
   * @returns {Date} the new date with the hours added
   * @throws {TypeError} 2 arguments required
   *
   * @example
   * // Add 2 hours to 10 July 2014 23:00:00:
   * var result = addHours(new Date(2014, 6, 10, 23, 0), 2)
   * //=> Fri Jul 11 2014 01:00:00
   */
  export default function addHours(dirtyDate, dirtyAmount) {
    requiredArgs(2, arguments)
  
    var amount = toInteger(dirtyAmount)
    return addMilliseconds(dirtyDate, amount * MILLISECONDS_IN_HOUR)
  }
  