JSTests/test262/test/language/expressions/delete/11.4.1-4.a-17.js

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
info: |
    This test is actually testing the [[Delete]] internal method (8.12.8). Since the
    language provides no way to directly exercise [[Delete]], the tests are placed here.
es5id: 11.4.1-4.a-17
description: delete operator returns true on deleting a arguments element
---*/

  function foo(a,b)
  {
    var d = delete arguments[0];
    return (d === true && arguments[0] === undefined);  
  }

assert.sameValue(foo(1,2), true, 'foo(1,2)');