private-method-brand-check-super-class.js (1403B)
1 // Copyright (C) 2019 Caio Lima (Igalia SL). All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 description: Subclass can access private methods of a superclass (private method) 6 esid: sec-privatefieldget 7 info: | 8 SuperCall : super Arguments 9 ... 10 10. Perform ? InitializeInstanceElements(result, F). 11 ... 12 13 InitializeInstanceFieldsElements ( O, constructor ) 14 1. Assert: Type ( O ) is Object. 15 2. Assert: Assert constructor is an ECMAScript function object. 16 3. If constructor.[[PrivateBrand]] is not undefined, 17 a. Perform ? PrivateBrandAdd(O, constructor.[[PrivateBrand]]). 18 4. Let fieldRecords be the value of constructor's [[Fields]] internal slot. 19 5. For each item fieldRecord in order from fieldRecords, 20 a. Perform ? DefineField(O, fieldRecord). 21 6. Return. 22 features: [class, class-methods-private] 23 ---*/ 24 25 class S { 26 #method() { return 'super class'; } 27 28 superAccess() { return this.#method(); } 29 } 30 31 class C extends S { 32 #method() { return 'test262'; } 33 34 access() { 35 return this.#method(); 36 } 37 } 38 39 let c = new C(); 40 41 assert.sameValue(c.access(), 'test262'); 42 assert.sameValue(c.superAccess(), 'super class'); 43 44 let s = new S(); 45 assert.sameValue(s.superAccess(), 'super class'); 46 assert.throws(TypeError, function() { 47 c.access.call(s); 48 }, 'invalid access of C private method'); 49 50 reportCompare(0, 0);