'use strict';
  
  Object.defineProperty(exports, "__esModule", {
      value: true
  });
  exports.default = doDuring;
  
  var _noop = require('lodash/noop');
  
  var _noop2 = _interopRequireDefault(_noop);
  
  var _slice = require('./internal/slice');
  
  var _slice2 = _interopRequireDefault(_slice);
  
  var _onlyOnce = require('./internal/onlyOnce');
  
  var _onlyOnce2 = _interopRequireDefault(_onlyOnce);
  
  var _wrapAsync = require('./internal/wrapAsync');
  
  var _wrapAsync2 = _interopRequireDefault(_wrapAsync);
  
  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
  
  /**
   * The post-check version of [`during`]{@link module:ControlFlow.during}. To reflect the difference in
   * the order of operations, the arguments `test` and `fn` are switched.
   *
   * Also a version of [`doWhilst`]{@link module:ControlFlow.doWhilst} with asynchronous `test` function.
   * @name doDuring
   * @static
   * @memberOf module:ControlFlow
   * @method
   * @see [async.during]{@link module:ControlFlow.during}
   * @category Control Flow
   * @param {AsyncFunction} fn - An async function which is called each time
   * `test` passes. Invoked with (callback).
   * @param {AsyncFunction} test - asynchronous truth test to perform before each
   * execution of `fn`. Invoked with (...args, callback), where `...args` are the
   * non-error args from the previous callback of `fn`.
   * @param {Function} [callback] - A callback which is called after the test
   * function has failed and repeated execution of `fn` has stopped. `callback`
   * will be passed an error if one occurred, otherwise `null`.
   */
  function doDuring(fn, test, callback) {
      callback = (0, _onlyOnce2.default)(callback || _noop2.default);
      var _fn = (0, _wrapAsync2.default)(fn);
      var _test = (0, _wrapAsync2.default)(test);
  
      function next(err /*, ...args*/) {
          if (err) return callback(err);
          var args = (0, _slice2.default)(arguments, 1);
          args.push(check);
          _test.apply(this, args);
      };
  
      function check(err, truth) {
          if (err) return callback(err);
          if (!truth) return callback(null);
          _fn(next);
      }
  
      check(null, true);
  }
  module.exports = exports['default'];