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/// Copyright (c) 2012 Ecma International. All rights reserved.
/// Ecma International makes this code available under the terms and conditions set
/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
/// "Use Terms"). Any redistribution of this code must retain the above
/// copyright and this notice and otherwise comply with the Use Terms.
/**
* @path ch15/15.4/15.4.4/15.4.4.20/15.4.4.20-9-c-ii-5.js
* @description Array.prototype.filter - k values are accessed during each iteration and not prior to starting the loop on an Array
*/
function testcase() {
var kIndex = [];
var called = 0;
//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
function callbackfn(val, idx, obj) {
called++;
//Each position should be visited one time, which means k is accessed one time during iterations.
if (kIndex[idx] === undefined) {
//when current position is visited, its previous index should has been visited.
if (idx !== 0 && kIndex[idx - 1] === undefined) {
return true;
}
kIndex[idx] = 1;
return false;
} else {
return true;
}
}
var newArr = [11, 12, 13, 14].filter(callbackfn, undefined);
return newArr.length === 0 && called === 4;
}
runTestCase(testcase);
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