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These tests are derived from the following files within the Google V8 project:
test/mjsunit/harmony/class-computed-property-names-super.js
test/mjsunit/harmony/class-property-name-eval-arguments.js
test/mjsunit/harmony/classes-experimental.js
test/mjsunit/harmony/classes-lazy-parsing.js
test/mjsunit/harmony/classes.js
30 lines
980 B
JavaScript
30 lines
980 B
JavaScript
// Copyright (C) Copyright 2014 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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es6id: 14.5
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description: >
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class sublclassing builtins
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---*/
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class ExtendedUint8Array extends Uint8Array {
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constructor() {
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super(10);
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this[0] = 255;
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this[1] = 0xFFA;
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}
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}
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var eua = new ExtendedUint8Array();
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assert.sameValue(eua.length, 10, "The value of `eua.length` is `10`");
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assert.sameValue(eua.byteLength, 10, "The value of `eua.byteLength` is `10`");
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assert.sameValue(eua[0], 0xFF, "The value of `eua[0]` is `0xFF`");
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assert.sameValue(eua[1], 0xFA, "The value of `eua[1]` is `0xFA`");
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assert.sameValue(
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Object.getPrototypeOf(eua),
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ExtendedUint8Array.prototype,
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"`Object.getPrototypeOf(eua)` returns `ExtendedUint8Array.prototype`"
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);
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assert.sameValue(
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Object.prototype.toString.call(eua),
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"[object Uint8Array]",
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"`Object.prototype.toString.call(eua)` returns `\"[object Uint8Array]\"`"
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); |