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// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 9.5.2
description: >
Throws a TypeError exception if boolean trap result is true, target is
not extensible, and the given parameter is not the same object as the target
prototype.
info: |
[[SetPrototypeOf]] (V)
...
2. Let handler be the value of the [[ProxyHandler]] internal slot of O.
...
5. Let target be the value of the [[ProxyTarget]] internal slot of O.
6. Let trap be GetMethod(handler, "setPrototypeOf").
...
9. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target, V»)).
14. Let targetProto be target.[[GetPrototypeOf]]().
15. ReturnIfAbrupt(targetProto).
16. If booleanTrapResult is true and SameValue(V, targetProto) is false,
throw a TypeError exception.
...
features: [Proxy, Reflect, Reflect.setPrototypeOf]
---*/
var target, proxy;
target = {};
proxy = new Proxy(target, {
setPrototypeOf: function() {
return true;
}
});
Object.preventExtensions(target);
assert.throws(TypeError, function() {
Reflect.setPrototypeOf(proxy, {});
}, "target prototype is different");
var proto = {};
target = Object.setPrototypeOf({}, proto);
proxy = new Proxy(target, {
setPrototypeOf: function() {
Object.setPrototypeOf(target, {});
Object.preventExtensions(target);
return true;
}
});
assert.throws(TypeError, function() {
Reflect.setPrototypeOf(proxy, proto);
}, "target prototype is changed inside trap handler");
reportCompare(0, 0);
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