| // Copyright 2018 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-intl-segmenter |
| |
| // Test subclassing of Segmenter |
| class CustomSegmenter extends Intl.Segmenter { |
| constructor(locales, options) { |
| super(locales, options); |
| this.isCustom = true; |
| } |
| } |
| |
| const seg = new CustomSegmenter("zh"); |
| assertEquals(true, seg.isCustom, "Custom property"); |
| assertEquals(Object.getPrototypeOf(seg), CustomSegmenter.prototype, "Prototype"); |