Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/test/mjsunit/es6/classes-maps.js b/test/mjsunit/es6/classes-maps.js
new file mode 100644
index 0000000..e519676
--- /dev/null
+++ b/test/mjsunit/es6/classes-maps.js
@@ -0,0 +1,68 @@
+// 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
+'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));
+}());