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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-proxy-object-internal-methods-and-internal-slots-setprototypeof-v
description: >
Calls target.[[GetPrototypeOf]] after trap result as false and not extensible
target
info: |
[[SetPrototypeOf]] (V)
8. Let booleanTrapResult be ToBoolean(? Call(trap, handler, « target, V »)).
9. If booleanTrapResult is false, return false.
10. Let extensibleTarget be ? IsExtensible(target).
11. If extensibleTarget is true, return true.
12. Let targetProto be ? target.[[GetPrototypeOf]]().
features: [Proxy, Reflect, Reflect.setPrototypeOf]
---*/
var calls = [];
var proto = {};
var target = new Proxy(Object.create(proto), {
isExtensible: function() {
calls.push("target.[[IsExtensible]]");
return false;
},
getPrototypeOf: function() {
calls.push("target.[[GetPrototypeOf]]");
return proto;
}
});
// Proxy must report same extensiblitity as target
Object.preventExtensions(target);
var proxy = new Proxy(target, {
setPrototypeOf: function() {
calls.push("proxy.[[setPrototypeOf]]");
return true;
}
});
assert.sameValue(Reflect.setPrototypeOf(proxy, proto), true);
assert.sameValue(calls.length, 3);
assert.sameValue(calls[0], "proxy.[[setPrototypeOf]]");
assert.sameValue(calls[1], "target.[[IsExtensible]]");
assert.sameValue(calls[2], "target.[[GetPrototypeOf]]");
reportCompare(0, 0);
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