iter-map-fn-return.js

Enable keyboard shortcuts

// |reftest| skip-if(!this.hasOwnProperty("Tuple"))

var thisVals = [];

var nextResult = {

  done: false,

  value: {}

};

var nextNextResult = {

  done: false,

  value: {}

};

var firstReturnVal = 1;

var secondReturnVal = 2;

var mapFn = function(value, idx) {

  var returnVal = nextReturnVal;

  nextReturnVal = nextNextReturnVal;

  nextNextReturnVal = null;

  return returnVal;

};

var nextReturnVal = firstReturnVal;

var nextNextReturnVal = secondReturnVal;

var items = {};

var result;

items[Symbol.iterator] = function() {

  return {

    next: function() {

      var result = nextResult;

      nextResult = nextNextResult;

      nextNextResult = {

        done: true

};

      return result;

};

};

result = Tuple.from(items, mapFn);

assertEq(result.length, 2);

assertEq(result[0], firstReturnVal);

assertEq(result[1], secondReturnVal);

reportCompare(0, 0);