| // 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); |