47 lines
1.1 KiB
JavaScript
47 lines
1.1 KiB
JavaScript
|
// Copyright 2014 the V8 project authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
// Flags: --allow-natives-syntax
|
||
|
|
|
||
|
|
// Test loading existent and nonexistent properties from dictionary
|
||
|
|
// mode objects.
|
||
|
|
|
||
|
|
function SlowObject() {
|
||
|
|
this.foo = 1;
|
||
|
|
this.bar = 2;
|
||
|
|
this.qux = 3;
|
||
|
|
delete this.qux;
|
||
|
|
assertFalse(%HasFastProperties(this));
|
||
|
|
}
|
||
|
|
function SlowObjectWithBaz() {
|
||
|
|
var o = new SlowObject();
|
||
|
|
o.baz = 4;
|
||
|
|
return o;
|
||
|
|
}
|
||
|
|
|
||
|
|
function Load(o) {
|
||
|
|
return o.baz;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (var i = 0; i < 10; i++) {
|
||
|
|
var o1 = new SlowObject();
|
||
|
|
var o2 = SlowObjectWithBaz();
|
||
|
|
assertEquals(undefined, Load(o1));
|
||
|
|
assertEquals(4, Load(o2));
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test objects getting optimized as fast prototypes.
|
||
|
|
|
||
|
|
function SlowPrototype() {
|
||
|
|
this.foo = 1;
|
||
|
|
}
|
||
|
|
SlowPrototype.prototype.bar = 2;
|
||
|
|
SlowPrototype.prototype.baz = 3;
|
||
|
|
delete SlowPrototype.prototype.baz;
|
||
|
|
|
||
|
|
assertFalse(%HasFastProperties(SlowPrototype.prototype));
|
||
|
|
var fast_proto = new SlowPrototype();
|
||
|
|
assertTrue(%HasFastProperties(SlowPrototype.prototype));
|
||
|
|
assertTrue(%HasFastProperties(fast_proto.__proto__));
|