Commit 3c5218f6 authored by dslomov's avatar dslomov Committed by Commit bot

Add a test for subclass maps.

R=arv@chromium.org

Review URL: https://codereview.chromium.org/1052963002

Cr-Commit-Position: refs/heads/master@{#27812}
parent 05ed6cb6
// 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: --harmony-classes --allow-natives-syntax
'use strict';
(function TestMaps() {
class Base {}
class Derived extends Base {}
let d1 = new Derived();
let d2 = new Derived();
assertTrue(%HaveSameMap(d1, d2));
}());
(function TestProtoModificationArray() {
let called = 0;
function F() {
called++;
assertFalse(Array.isArray(this));
}
class Derived extends Array {}
assertSame(Derived.__proto__, Array);
let d1 = new Derived();
assertTrue(Array.isArray(d1));
Derived.__proto__ = F;
called = 0;
let d2 = new Derived();
assertSame(1, called);
assertFalse(Array.isArray(d2));
assertFalse(%HaveSameMap(d1, d2));
}());
(function TestProtoModification() {
let called = 0;
function F() {
called++;
let exn = null;
try {
this.byteLength;
} catch (e) {
exn = e;
}
assertTrue(exn instanceof TypeError);
}
class Derived extends Uint8Array {
constructor() { super(10); }
}
assertSame(Derived.__proto__, Uint8Array);
let d1 = new Derived();
assertSame(10, d1.byteLength);
Derived.__proto__ = F;
called = 0;
let d2 = new Derived();
assertSame(1, called);
assertThrows(function() { d2.byteLength; }, TypeError);
assertFalse(%HaveSameMap(d1, d2));
}());
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