mirror of https://github.com/tc39/test262.git
52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
// Copyright (C) 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 subclass binding
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---*/
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class Base {
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constructor(x, y) {
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this.x = x;
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this.y = y;
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}
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}
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var obj = {};
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class Subclass extends Base {
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constructor(x, y) {
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super(x,y);
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assert.sameValue(this !== obj, true, "The result of `this !== obj` is `true`");
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}
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}
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var f = Subclass.bind(obj);
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assert.throws(TypeError, function () { f(1, 2); });
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var s = new f(1, 2);
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assert.sameValue(s.x, 1, "The value of `s.x` is `1`");
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assert.sameValue(s.y, 2, "The value of `s.y` is `2`");
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assert.sameValue(
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Object.getPrototypeOf(s),
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Subclass.prototype,
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"`Object.getPrototypeOf(s)` returns `Subclass.prototype`"
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);
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var s1 = new f(1);
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assert.sameValue(s1.x, 1, "The value of `s1.x` is `1`");
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assert.sameValue(s1.y, undefined, "The value of `s1.y` is `undefined`");
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assert.sameValue(
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Object.getPrototypeOf(s1),
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Subclass.prototype,
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"`Object.getPrototypeOf(s1)` returns `Subclass.prototype`"
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);
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var g = Subclass.bind(obj, 1);
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assert.throws(TypeError, function () { g(8); });
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var s2 = new g(8);
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assert.sameValue(s2.x, 1, "The value of `s2.x` is `1`");
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assert.sameValue(s2.y, 8, "The value of `s2.y` is `8`");
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assert.sameValue(
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Object.getPrototypeOf(s),
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Subclass.prototype,
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"`Object.getPrototypeOf(s)` returns `Subclass.prototype`"
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); |