| // Copyright 2008 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| function A() { } |
| function B() { } |
| function C() { } |
| |
| function NewC() { |
| A.prototype = {}; |
| B.prototype = new A(); |
| C.prototype = new B(); |
| var result = new C(); |
| result.A = A.prototype; |
| result.B = B.prototype; |
| result.C = C.prototype; |
| return result; |
| } |
| |
| // Check that we can read properties defined in prototypes. |
| var c = NewC(); |
| c.A.x = 1; |
| c.B.y = 2; |
| c.C.z = 3; |
| assertEquals(1, c.x); |
| assertEquals(2, c.y); |
| assertEquals(3, c.z); |
| |
| var c = NewC(); |
| c.A.x = 0; |
| for (var i = 0; i < 2; i++) { |
| assertEquals(i, c.x); |
| c.B.x = 1; |
| } |
| |
| |
| // Regression test: |
| // Make sure we preserve the prototype of an object in the face of map transitions. |
| |
| function D() { |
| this.d = 1; |
| } |
| var p = new Object(); |
| p.y = 1; |
| new D(); |
| |
| D.prototype = p |
| assertEquals(1, (new D).y); |
| |
| |
| // Regression test: |
| // Make sure that arrays and functions in the prototype chain works; |
| // check length. |
| function X() { } |
| function Y() { } |
| |
| X.prototype = function(a,b) { }; |
| Y.prototype = [1,2,3]; |
| |
| assertEquals(2, (new X).length); |
| assertEquals(3, (new Y).length); |
| |
| |
| // Test setting the length of an object where the prototype is from an array. |
| var test = new Object; |
| test.__proto__ = (new Array()).__proto__; |
| test.length = 14; |
| assertEquals(14, test.length); |