| // Copyright (C) 2019 Jaideep Bhoosreddy (Bloomberg LP). All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| description: Every new evaluation of a class creates a different brand (private setter) |
| esid: sec-privatefieldget |
| info: | |
| ClassTail : ClassHeritage { ClassBody } |
| ... |
| 11. Let proto be ObjectCreate(protoParent). |
| ... |
| 31. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that the P's [[Kind]] field is either "method" or "accessor", |
| a. Set F.[[PrivateBrand]] to proto. |
| ... |
| |
| PrivateBrandCheck(O, P) |
| 1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true, |
| a. Throw a TypeError exception. |
| features: [class, class-methods-private] |
| ---*/ |
| |
| let classStringExpression = ` |
| return class { |
| set #m(v) { this._v = v; } |
| |
| access(o, v) { |
| o.#m = v; |
| } |
| } |
| `; |
| |
| let createAndInstantiateClass = function () { |
| let classFactoryFunction = new Function(classStringExpression); |
| let Class = classFactoryFunction(); |
| return new Class(); |
| }; |
| |
| let c1 = createAndInstantiateClass(); |
| let c2 = createAndInstantiateClass(); |
| |
| c1.access(c1, 'test262'); |
| assert.sameValue(c1._v, 'test262'); |
| c2.access(c2, 'test262'); |
| assert.sameValue(c2._v, 'test262'); |
| |
| assert.throws(TypeError, function() { |
| c1.access(c2, 'foo'); |
| }, 'invalid access of c1 private method'); |
| |
| assert.throws(TypeError, function() { |
| c2.access(c1, 'foo'); |
| }, 'invalid access of c2 private method'); |