test/built-ins/String/prototype/trim/15.5.4.20-2-43.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: 15.5.4.20-2-43
description: >
    String.prototype.trim - 'this' is an object with an own valueOf
    and inherited toString methods with hint string, verify inherited
    toString method will be called first
---*/

        var toStringAccessed = false;
        var valueOfAccessed = false;

        var proto = {
            toString: function () {
                toStringAccessed = true;
                return "abc";
            }
        };

        var Con = function () { };
        Con.prototype = proto;

        var child = new Con();
        child.valueOf = function () {
            valueOfAccessed = true;
            return "efg";
        };

assert.sameValue(String.prototype.trim.call(child), "abc", 'String.prototype.trim.call(child)');
assert(toStringAccessed, 'toStringAccessed !== true');
assert.sameValue(valueOfAccessed, false, 'valueOfAccessed');