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Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically embedded into Java applications to provide scripting to end users.

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

gTestfile = 'instanceof-003.js';

/**
   File Name:          instanceof-003.js
   ECMA Section:
   Description:        http://bugzilla.mozilla.org/show_bug.cgi?id=7635

   js> function Foo() {}
   js> theproto = {};
   [object Object]
   js> Foo.prototype = theproto
   [object Object]
   js> theproto instanceof Foo
   true

   I think this should be 'false'


   Author:             [email protected]
   Date:               12 november 1997

   Modified to conform to ECMA3
   https://bugzilla.mozilla.org/show_bug.cgi?id=281606
*/
var SECTION = "instanceof-003";
var VERSION = "ECMA_2";
var TITLE   = "instanceof operator";
var BUGNUMBER ="7635";

startTest();

function Foo() {};
theproto = {};
Foo.prototype = theproto;

AddTestCase(
  "function Foo() = {}; theproto = {}; Foo.prototype = theproto; " +
  "theproto instanceof Foo",
  false,
  theproto instanceof Foo );


var o = {};

// https://bugzilla.mozilla.org/show_bug.cgi?id=281606
try
{
  AddTestCase(
    "o = {}; o instanceof o",
    "error",
    o instanceof o );
}
catch(e)
{
  AddTestCase(
    "o = {}; o instanceof o",
    "error",
    "error" );
}

test();