mirror of
https://github.com/tc39/test262.git
synced 2025-08-28 13:28:38 +02:00
27 lines
1.1 KiB
JavaScript
27 lines
1.1 KiB
JavaScript
/// 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 ch15/15.4/15.4.4/15.4.4.14/15.4.4.14-4-7.js
|
|
* @description Array.prototype.indexOf returns -1 if 'length' is 0 ( length is object overridden with obj w/o valueOf (toString))
|
|
*/
|
|
|
|
|
|
function testcase() {
|
|
|
|
|
|
// objects inherit the default valueOf method of the Object object;
|
|
// that simply returns the itself. Since the default valueOf() method
|
|
// does not return a primitive value, ES next tries to convert the object
|
|
// to a number by calling its toString() method and converting the
|
|
// resulting string to a number.
|
|
var i = Array.prototype.indexOf.call({length: { toString: function () { return '0';}}}, 1);
|
|
|
|
if (i === -1) {
|
|
return true;
|
|
}
|
|
}
|
|
runTestCase(testcase);
|