test/script/basic/NASHORN-442.js

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 */

/**
 * NASHORN-442 : for loop for object properties repeats property names.
 *
 * @test
 * @run
 */

var proto = { foo : 33 };
var obj = Object.create(proto);
obj.foo = 'hello';

var fooSeen = false;
var count = 0;
for (i in obj) {
    count++;
    if (i === "foo") {
        if (fooSeen) {
            fail("foo repeated in for loop");
        }
        fooSeen = true;
    }
}

if (count !== 1) {
    fail("only one property expected in for loop");
}