test/script/basic/incheck.js

/*
 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

/**
 * Check that the expression ("property" in obj) works for own property as
 * well as properties 'inherited' from proto chain.
 *
 * @test
 * @run
 */

function MyCons() {
    this.foo = "hello";
}

MyCons.prototype.func = function() { print("func " + this); }
MyCons.prototype.num = 1729;

var myObj = new MyCons();
print("foo? " + ("foo" in myObj));
print("func? " + ("func" in myObj));
print("num? " + ("num" in myObj));
// From Object.prototype
print("toString?" + ("toString" in myObj));

MyCons.prototype.sun = "a star";
MyCons.prototype.earth = "a planet";

print("foo? " + ("foo" in myObj));
print("func? " + ("func" in myObj));
print("num? " + ("num" in myObj));
print("sun? " + ("sun" in myObj));
print("earth? " + ("earth" in myObj));
print("toString? " + ("toString" in myObj));