test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-22.js


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// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 15.4.4.15-3-22
description: >
    Array.prototype.lastIndexOf throws TypeError exception when
    'length' is an object with toString and valueOf methods that don�t
    return primitive values
includes: [runTestCase.js]
---*/

function testcase() {

        var toStringAccessed = false;
        var valueOfAccessed = false;

        var obj = {
            1: true,
            length: {
                toString: function () {
                    toStringAccessed = true;
                    return {};
                },

                valueOf: function () {
                    valueOfAccessed = true;
                    return {};
                }
            }
        };

        try {
            Array.prototype.lastIndexOf.call(obj, true);
            return false;
        } catch (e) {
            return toStringAccessed && valueOfAccessed;
        }
    }
runTestCase(testcase);