JSTests/test262/test/language/expressions/delete/11.4.1-4.a-2.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.
esid: sec-delete-operator-runtime-semantics-evaluation
description: >
    delete operator returns true when deleting a configurable accessor
    property
---*/

var o = {};

// define an accessor
// dummy getter
var getter = function() {
  return 1;
};
var desc = {
  get: getter,
  configurable: true,
};
Object.defineProperty(o, 'foo', desc);

var d = delete o.foo;

assert.sameValue(d, true, 'd');
assert.sameValue(o.hasOwnProperty('foo'), false, 'o.hasOwnProperty("foo")');