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// 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 false if value is not the 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.throws(TypeError, function() {
Object.setPrototypeOf(ObjProto, {});
}, "Object.setPrototypeOf(ObjProto, {}) throws a TypeError");
assert.throws(TypeError, function() {
Object.setPrototypeOf(ObjProto, Array.prototype);
}, "Object.setPrototypeOf(ObjProto, Array.prototype) throws a TypeError");
assert.throws(TypeError, function() {
Object.setPrototypeOf(ObjProto, ObjProto);
}, "Object.setPrototypeOf(ObjProto, ObjProto) throws a TypeError");
assert.sameValue(
Reflect.setPrototypeOf(ObjProto, {}),
false,
"Reflect.setPrototypeOf(ObjProto, {}) returns false"
);
assert.sameValue(
Reflect.setPrototypeOf(ObjProto, Array.prototype),
false,
"Reflect.setPrototypeOf(ObjProto, Array.prototype) returns false"
);
assert.sameValue(
Reflect.setPrototypeOf(ObjProto, ObjProto),
false,
"Reflect.setPrototypeOf(ObjProto, ObjProto) returns false"
);
reportCompare(0, 0);
|
