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// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-proxy-object-internal-methods-and-internal-slots-setprototypeof-v
description: >
If "setPrototypeOf" trap is null or undefined, [[SetPrototypeOf]] call
is properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
info: |
[[SetPrototypeOf]] ( V )
[...]
5. Let target be O.[[ProxyTarget]].
6. Let trap be ? GetMethod(handler, "setPrototypeOf").
7. If trap is undefined, then
a. Return ? target.[[SetPrototypeOf]](V).
[[SetPrototypeOf]] ( V )
[...]
8. Let booleanTrapResult be ! ToBoolean(? Call(trap, handler, « target, V »)).
9. If booleanTrapResult is false, return false.
features: [Proxy]
---*/
var target = new Proxy({}, {
setPrototypeOf: function(_target, _value) {
return false;
},
});
var proxy = new Proxy(target, {});
assert.throws(TypeError, function() {
Object.setPrototypeOf(proxy, null);
});
reportCompare(0, 0);
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