hunk.code_window: var startOfHour = require('../start_of_hour')
   describe('startOfHour', function() {
     it('returns date with minutes setted to 00:00:00', function() {
       var date = new Date('2014-09-02T11:55:00')
       var result = startOfHour(date)
  
hunk.labels: keep keep keep keep replace keep
hunk.after_edit:     var date = new Date(2014, 8 /* Sep */, 2, 11, 55)
  
hunk.file_path: src/__tests__/start_of_hour_test.js
hunk.type: replace
file: var addSeconds = require('./add_seconds')
  
  /**
   * Subtracts specified number of seconds from passed date.
   * @param {data|string} dirtyDate
   * @param {number} amount of seconds
   * @returns {date} new date
   */
  var subSeconds = function(dirtyDate, amount) {
    return addSeconds(dirtyDate, -amount)
  }
  
  module.exports = subSeconds
  
  