private-static-getter-multiple-evaluations-of-class-function-ctor.js (1683B)
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: Every new evaluation of a class creates a different Private Name (private static getter) 6 esid: sec-runtime-semantics-evaluate-name 7 info: | 8 ClassTail : ClassHeritage { ClassBody } 9 ... 10 19. Let F be constructorInfo.[[Closure]]. 11 20. If ClassHeritage_opt is present and protoParent is not null, then set F.[[ConstructorKind]] to "derived". 12 21. Perform MakeConstructor(F, false, proto). 13 22. Perform MakeClassConstructor(F). 14 ... 15 33. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that P's [[Kind]] field is either "method" or "accessor" and P's [[Brand]] is F, 16 a. PrivateBrandAdd(F, F). 17 ... 18 19 PrivateBrandCheck(O, P) 20 1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true, 21 a. Throw a TypeError exception. 22 features: [class, class-static-methods-private] 23 ---*/ 24 25 let classStringExpression = ` 26 return class { 27 static get #m() { 28 return 'test262'; 29 }; 30 31 static access() { 32 return this.#m; 33 } 34 } 35 `; 36 37 let createClass = function () { 38 let classFactoryFunction = new Function(classStringExpression); 39 return classFactoryFunction(); 40 }; 41 42 let C1 = createClass(); 43 let C2 = createClass(); 44 45 assert.sameValue(C1.access(), 'test262'); 46 assert.sameValue(C2.access(), 'test262'); 47 48 assert.throws(TypeError, function() { 49 C1.access.call(C2); 50 }, 'invalid access of C1 private static getter'); 51 52 assert.throws(TypeError, function() { 53 C2.access.call(C1); 54 }, 'invalid access of C2 private static getter'); 55 56 reportCompare(0, 0);