| // 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 default constructor 2 |
| ---*/ |
| class Base1 { } |
| assert.throws(TypeError, function() { Base1(); }); |
| |
| class Subclass1 extends Base1 { } |
| |
| assert.throws(TypeError, function() { Subclass1(); }); |
| |
| var s1 = new Subclass1(); |
| assert.sameValue( |
| Subclass1.prototype, |
| Object.getPrototypeOf(s1), |
| "The value of `Subclass1.prototype` is `Object.getPrototypeOf(s1)`, after executing `var s1 = new Subclass1();`" |
| ); |
| |
| class Base2 { |
| constructor(x, y) { |
| this.x = x; |
| this.y = y; |
| } |
| } |
| |
| class Subclass2 extends Base2 {}; |
| |
| var s2 = new Subclass2(1, 2); |
| |
| assert.sameValue( |
| Subclass2.prototype, |
| Object.getPrototypeOf(s2), |
| "The value of `Subclass2.prototype` is `Object.getPrototypeOf(s2)`, after executing `var s2 = new Subclass2(1, 2);`" |
| ); |
| assert.sameValue(s2.x, 1, "The value of `s2.x` is `1`"); |
| assert.sameValue(s2.y, 2, "The value of `s2.y` is `2`"); |
| |
| var f = Subclass2.bind({}, 3, 4); |
| var s2prime = new f(); |
| assert.sameValue( |
| Subclass2.prototype, |
| Object.getPrototypeOf(s2prime), |
| "The value of `Subclass2.prototype` is `Object.getPrototypeOf(s2prime)`" |
| ); |
| assert.sameValue(s2prime.x, 3, "The value of `s2prime.x` is `3`"); |
| assert.sameValue(s2prime.y, 4, "The value of `s2prime.y` is `4`"); |
| |
| |
| var obj = {}; |
| class Base3 { |
| constructor() { |
| return obj; |
| } |
| } |
| |
| class Subclass3 extends Base3 {}; |
| |
| var s3 = new Subclass3(); |
| assert.sameValue(s3, obj, "The value of `s3` is `obj`"); |
| |