// Copyright (C) 2019 Aleksey 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-delete-p
description: >
Throw a TypeError exception if trap result is true, targetDesc is configurable,
and target is not extensible.
info: |
[[Delete]] (P)
...
13. Let extensibleTarget be ? IsExtensible(target).
14. If extensibleTarget is false, throw a TypeError exception.
...
features: [Proxy, Reflect, proxy-missing-checks]
---*/
var trapCalls = 0;
var p = new Proxy({prop: 1}, {
deleteProperty: function(t, prop) {
Object.preventExtensions(t);
trapCalls++;
return true;
},
});
assert.throws(TypeError, function() {
Reflect.deleteProperty(p, "prop");
});
assert.sameValue(trapCalls, 1);
assert(Reflect.deleteProperty(p, "nonExistent"));
assert.sameValue(trapCalls, 2);