1 /*

     2  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /**

    25  * Test the assumptions about bound function prototypes

    26  *

    27  * @test

    28  * @run

    29  */

    30 

    31 function printAssumption(__x__) {

    32   print(__x__ + ": " + eval(__x__));

    33 }

    34 

    35 function f() { }

    36 

    37 var b = f.bind(null)

    38 

    39 var x = new f()

    40 var y = new b()

    41 

    42 printAssumption("x instanceof f")

    43 printAssumption("x instanceof b")

    44 printAssumption("y instanceof f")

    45 printAssumption("y instanceof b")

    46 

    47 print("\nChanging prototype\n");

    48 

    49 f.prototype=new Object()

    50 

    51 printAssumption("x instanceof f")

    52 printAssumption("x instanceof b")

    53 printAssumption("y instanceof f")

    54 printAssumption("y instanceof b")

    55 

    56 print("\Bound function prototype\n");

    57 

    58 printAssumption("f.hasOwnProperty('prototype')")

    59 printAssumption("b.hasOwnProperty('prototype')")