accessors.js (1631B)
1 // Copyright (C) 2014 the V8 project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 /*--- 4 es6id: 14.5 5 description: > 6 class accessors 7 ---*/ 8 9 function assertAccessorDescriptor(object, name) { 10 var desc = Object.getOwnPropertyDescriptor(object, name); 11 assert.sameValue(desc.configurable, true, "The value of `desc.configurable` is `true`"); 12 assert.sameValue(desc.enumerable, false, "The value of `desc.enumerable` is `false`"); 13 assert.sameValue(typeof desc.get, 'function', "`typeof desc.get` is `'function'`"); 14 assert.sameValue(typeof desc.set, 'function', "`typeof desc.set` is `'function'`"); 15 assert.sameValue( 16 'prototype' in desc.get, 17 false, 18 "The result of `'prototype' in desc.get` is `false`" 19 ); 20 assert.sameValue( 21 'prototype' in desc.set, 22 false, 23 "The result of `'prototype' in desc.set` is `false`" 24 ); 25 } 26 27 28 class C { 29 constructor(x) { 30 this._x = x; 31 } 32 33 get x() { return this._x; } 34 set x(v) { this._x = v; } 35 36 static get staticX() { return this._x; } 37 static set staticX(v) { this._x = v; } 38 } 39 40 assertAccessorDescriptor(C.prototype, 'x'); 41 assertAccessorDescriptor(C, 'staticX'); 42 43 var c = new C(1); 44 c._x = 1; 45 assert.sameValue(c.x, 1, "The value of `c.x` is `1`, after executing `c._x = 1;`"); 46 c.x = 2; 47 assert.sameValue(c._x, 2, "The value of `c._x` is `2`, after executing `c.x = 2;`"); 48 49 C._x = 3; 50 assert.sameValue(C.staticX, 3, "The value of `C.staticX` is `3`, after executing `C._x = 3;`"); 51 C._x = 4; 52 assert.sameValue(C.staticX, 4, "The value of `C.staticX` is `4`, after executing `C._x = 4;`"); 53 54 reportCompare(0, 0);