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// Copyright 2008 Google Inc. 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);
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