test/suite/ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-5-30.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

/// 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 ch15/15.4/15.4.4/15.4.4.15/15.4.4.15-5-30.js
 * @description Array.prototype.lastIndexOf - side effects produced by step 3 are visible when an exception occurs
 */


function testcase() {

        var stepFiveOccurs = false;

        var obj = {};
        Object.defineProperty(obj, "length", {
            get: function () {
                return {
                    valueOf: function () {
                        throw new TypeError();
                    }
                };
            },
            configurable: true
        });

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

        try {
            Array.prototype.lastIndexOf.call(obj, undefined, fromIndex);
            return false;
        } catch (e) {
            return (e instanceof TypeError) && !stepFiveOccurs;
        }
    }
runTestCase(testcase);