Strict mode Passingnon-Strict mode Passing
Features:
- Reflect.setPrototypeOf
// Copyright (C) 2016 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-immutable-prototype-exotic-objects-setprototypeof-v description: > Object.prototype's [[SetPrototypeOf]] returns true if value is same info: | 9.4.7.1 [[SetPrototypeOf]] (V) ... 2. Let current be the value of the [[Prototype]] internal slot of O. 3. If SameValue(V, current), return true. 4. Return false. 19.1.3 Properties of the Object Prototype Object The value of the [[Prototype]] internal slot of the Object prototype object is null and the initial value of the [[Extensible]] internal slot is true. features: [Reflect.setPrototypeOf] ---*/ var ObjProto = Object.prototype; assert.sameValue( Object.setPrototypeOf(ObjProto, null), ObjProto, "Object.setPrototypeOf(ObjProto, null) returns the Object.prototype" ); assert( Object.isExtensible(ObjProto), "Object.prototype is still extensible after a setPrototypeOf operation - #1" ); assert.sameValue( Reflect.setPrototypeOf(ObjProto, null), true, "Reflect.setPrototypeOf(ObjProto, null) returns true" ); assert( Object.isExtensible(ObjProto), "Object.prototype is still extensible after a setPrototypeOf operation - #2" );