JSTests/test262/test/language/global-code/script-decl-var-err.js

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-globaldeclarationinstantiation
es6id: 15.1.8
description: >
  Declaration of variable when there is no corresponding global property and
  the global object is non-extensible
info: |
  [...]
  11. Let declaredVarNames be a new empty List.
  12. For each d in varDeclarations, do
      a. If d is a VariableDeclaration or a ForBinding, then
         i. For each String vn in the BoundNames of d, do
            1. If vn is not an element of declaredFunctionNames, then
               a. Let vnDefinable be ? envRec.CanDeclareGlobalVar(vn).
               b. If vnDefinable is false, throw a TypeError exception.
               c. If vn is not an element of declaredVarNames, then
                  i. Append vn to declaredVarNames.

  8.1.1.4.15 CanDeclareGlobalVar

  1. Let envRec be the global Environment Record for which the method was
     invoked.
  2. Let ObjRec be envRec.[[ObjectRecord]].
  3. Let globalObject be the binding object for ObjRec.
  4. Let hasProperty be ? HasOwnProperty(globalObject, N).
  5. If hasProperty is true, return true.
  6. Return ? IsExtensible(globalObject). 
---*/

var executed = false;

Object.preventExtensions(this);

assert.throws(TypeError, function() {
  $262.evalScript('executed = true; var test262;');
});

assert.sameValue(executed, false);