test/built-ins/Array/prototype/indexOf/15.4.4.14-5-27.js


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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.

/*---
es5id: 15.4.4.14-5-27
description: >
    Array.prototype.indexOf - side effects produced by step 3 are
    visible when an exception occurs
includes: [runTestCase.js]
---*/

function testcase() {
        var stepThreeOccurs = false;
        var stepFiveOccurs = false;

        var obj = {};

        Object.defineProperty(obj, "length", {
            get: function () {
                return {
                    valueOf: function () {
                        stepThreeOccurs = true;
                        if (stepFiveOccurs) {
                            throw new Error("Step 5 occurred out of order");
                        }
                        return 20;
                    }
                };
            },
            configurable: true
        });

        var fromIndex = {
            valueOf: function () {
                stepFiveOccurs = true;
                return 0;
            }
        };

        try {
            Array.prototype.indexOf.call(obj, undefined, fromIndex);
            return stepThreeOccurs && stepFiveOccurs;
        } catch (ex) {
            return false;
        }
    }
runTestCase(testcase);