JSTests/test262/test/language/arguments-object/mapped/mapped-arguments-nonconfigurable-delete-1.js

// Copyright (C) 2015 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
info: Mapped arguments object with non-configurable property
description: >
    Mapping works when property is non-configurable, arguments property
    was not deleted. [[Delete]] operation returns false.
flags: [noStrict]
---*/

function argumentsAndDelete(a) {
  Object.defineProperty(arguments, "0", {configurable: false});

  assert.sameValue(delete arguments[0], false);
  assert.sameValue(a, 1);
  assert.sameValue(arguments[0], 1);
}
argumentsAndDelete(1);