mirror of
https://github.com/tc39/test262.git
synced 2025-05-13 03:10:30 +02:00
d9ddf80479
This reverts commit b690cb67be9b487eb10156c03e2c00869e88cc9d, reversing changes made to 50dd431dffe5cf86e9064a652d6b01dbbe542cf0. This is necessary because the reverted changeset reduced coverage by an unknown extent.
34 lines
887 B
JavaScript
34 lines
887 B
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
/*---
|
|
es6id: 22.1.1
|
|
description: Subclassing Array
|
|
info: |
|
|
22.1.1 The Array Constructor
|
|
|
|
The Array constructor is designed to be subclassable. It may be used as the
|
|
value of an extends clause of a class definition. (...)
|
|
includes: [compareArray.js]
|
|
---*/
|
|
|
|
class Sub extends Array {}
|
|
|
|
var a1 = new Sub(42, 'foo');
|
|
|
|
assert.sameValue(a1.length, 2);
|
|
assert.sameValue(a1[0], 42);
|
|
assert.sameValue(a1[1], 'foo');
|
|
|
|
a1.push(true);
|
|
assert.sameValue(a1.length, 3, 'Array#push updates the length property');
|
|
assert.sameValue(a1[0], 42);
|
|
assert.sameValue(a1[1], 'foo');
|
|
assert.sameValue(a1[2], true, 'Adds new item');
|
|
|
|
var a2 = new Sub(7);
|
|
assert.sameValue(a2.length, 7);
|
|
|
|
var a3 = new Sub();
|
|
assert(compareArray(a3, []));
|
|
assert.sameValue(a3.length, 0);
|