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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.
/*---
esid: sec-proxy-object-internal-methods-and-internal-slots-setprototypeof-v
description: >
Handler can only return true for non-extensible targets if the given prototype
is the same as target's prototype
info: |
[[SetPrototypeOf]] (V)
12. Let targetProto be ? target.[[GetPrototypeOf]]().
13. If SameValue(V, targetProto) is false, throw a TypeError exception.
14. Return true.
features: [Proxy, Reflect, Reflect.setPrototypeOf]
---*/
var proto = {};
var target = Object.setPrototypeOf({}, proto);
Object.preventExtensions(target);
var proxy;
proxy = new Proxy(target, {
setPrototypeOf: function() {
return true;
}
});
assert.sameValue(
Reflect.setPrototypeOf(proxy, proto),
true,
"prototype arg is the same in target"
);
var outro = {};
proxy = new Proxy(outro, {
setPrototypeOf: function(t, p) {
Object.setPrototypeOf(t, p);
Object.preventExtensions(t);
return true;
}
});
assert.sameValue(
Reflect.setPrototypeOf(proxy, proto),
true,
"prototype is set to target inside handler trap"
);
assert.sameValue(
Object.getPrototypeOf(outro),
proto,
"target has the custom set prototype"
);
reportCompare(0, 0);
|
