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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: 9.5.7
description: >
A property cannot be reported as non-existent, if it exists as an own
property of the target object and the target object is not extensible.
info: |
[[HasProperty]] (P)
...
11. If booleanTrapResult is false, then
a. Let targetDesc be target.[[GetOwnProperty]](P).
b. ReturnIfAbrupt(targetDesc).
c. If targetDesc is not undefined, then
...
ii. Let extensibleTarget be IsExtensible(target).
...
iv. If extensibleTarget is false, throw a TypeError exception.
...
---*/
var target = {};
var handler = {
has: function(t, prop) {
return 0;
}
};
var p = new Proxy(target, handler);
Object.defineProperty(target, "attr", {
configurable: true,
value: 1
});
Object.preventExtensions(target);
assert.throws(TypeError, function() {
"attr" in p;
});
|
