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      1 // Copyright 2013 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 var extend = function (d, b) {
     29   function __() { this.constructor = d; }
     30   __.prototype = b.prototype;
     31   d.prototype = new __();
     32 };
     33 
     34 var Car = (function (Super) {
     35   var Car = function () {
     36     var self = this;
     37 
     38     Super.call(self);
     39 
     40     Object.defineProperties(self, {
     41       "make": {
     42         enumerable: true,
     43         configurable: true,
     44         get: function () {
     45           return "Ford";
     46         }
     47       }
     48     });
     49 
     50     self.copy = function () {
     51       throw new Error("Meant to be overriden");
     52     };
     53 
     54     return self;
     55   };
     56 
     57   extend(Car, Super);
     58 
     59   return Car;
     60 }(Object));
     61 
     62 
     63 var SuperCar = ((function (Super) {
     64   var SuperCar = function (make) {
     65     var self = this;
     66 
     67     Super.call(self);
     68 
     69 
     70     Object.defineProperties(self, {
     71       "make": {
     72         enumerable: true,
     73         configurable: true,
     74         get: function () {
     75           return make;
     76         }
     77       }
     78     });
     79 
     80     // Convert self.copy from CONSTANT to FIELD.
     81     self.copy = function () { };
     82 
     83     return self;
     84   };
     85   extend(SuperCar, Super);
     86   return SuperCar;
     87 })(Car));
     88 
     89 assertEquals("Ford", new Car().make);
     90 assertEquals("Bugatti", new SuperCar("Bugatti").make);
     91 assertEquals("Lambo", new SuperCar("Lambo").make);
     92 assertEquals("Shelby", new SuperCar("Shelby").make);
     93