test262/test/language/expressions/delete/11.4.1-0-1.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: 11.4.1-0-1
description: delete operator as UnaryExpression
flags: [noStrict]
---*/

function testcase() {
  var x = 1;
  var y = 2;
  var z = 3;

  assert((!delete x || delete y), '(!delete x || delete y)');
  assert(delete delete z, 'delete delete z');
 }
testcase();