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// Copyright (C) 2014 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 14.5
description: >
class subclass binding
---*/
class Base {
constructor(x, y) {
this.x = x;
this.y = y;
}
}
var obj = {};
class Subclass extends Base {
constructor(x, y) {
super(x,y);
assert.sameValue(this !== obj, true, "The result of `this !== obj` is `true`");
}
}
var f = Subclass.bind(obj);
assert.throws(TypeError, function () { f(1, 2); });
var s = new f(1, 2);
assert.sameValue(s.x, 1, "The value of `s.x` is `1`");
assert.sameValue(s.y, 2, "The value of `s.y` is `2`");
assert.sameValue(
Object.getPrototypeOf(s),
Subclass.prototype,
"`Object.getPrototypeOf(s)` returns `Subclass.prototype`"
);
var s1 = new f(1);
assert.sameValue(s1.x, 1, "The value of `s1.x` is `1`");
assert.sameValue(s1.y, undefined, "The value of `s1.y` is `undefined`");
assert.sameValue(
Object.getPrototypeOf(s1),
Subclass.prototype,
"`Object.getPrototypeOf(s1)` returns `Subclass.prototype`"
);
var g = Subclass.bind(obj, 1);
assert.throws(TypeError, function () { g(8); });
var s2 = new g(8);
assert.sameValue(s2.x, 1, "The value of `s2.x` is `1`");
assert.sameValue(s2.y, 8, "The value of `s2.y` is `8`");
assert.sameValue(
Object.getPrototypeOf(s),
Subclass.prototype,
"`Object.getPrototypeOf(s)` returns `Subclass.prototype`"
);
reportCompare(0, 0);
|
