non-Strict mode Failing
Expected no error, got ESHostError: Expected SameValue(«0», «foo») to be true
Features:
- ∅
Expected no error, got ESHostError: Expected SameValue(«0», «foo») to be true
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-arguments-exotic-objects-defineownproperty-p-desc
description: >
Index stays mapped when redefined with complete descriptor, which differs only
by the [[Value]] field. Unmapped index is created.
info: |
[[DefineOwnProperty]] ( P, Desc )
[...]
6. Let allowed be ? OrdinaryDefineOwnProperty(args, P, newArgDesc).
7. If allowed is false, return false.
8. If isMapped is true, then
[...]
b. Else,
i. If Desc.[[Value]] is present, then
1. Let setStatus be Set(map, P, Desc.[[Value]], false).
2. Assert: setStatus is true because formal parameters mapped by argument objects are always writable.
9. Return true.
flags: [noStrict]
---*/
(function(a) {
Object.defineProperty(arguments, "0", {
value: "foo",
writable: true,
enumerable: true,
configurable: true,
});
assert.sameValue(a, "foo");
assert.sameValue(arguments[0], "foo");
Object.defineProperty(arguments, "1", {
value: "bar",
writable: true,
enumerable: true,
configurable: true,
});
assert.sameValue(arguments[1], "bar");
})(0);