tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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instn-local-bndng-var.js (1330B)

      1 // |reftest| module
      2 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 /*---
      5 description: >
      6    Mutable bindings are initialized in the lexical environment record prior to
      7    execution for variable declarations
      8 esid: sec-moduledeclarationinstantiation
      9 info: |
     10    [...]
     11    13. Let varDeclarations be the VarScopedDeclarations of code.
     12    14. Let declaredVarNames be a new empty List.
     13    15. For each element d in varDeclarations do
     14        a. For each element dn of the BoundNames of d do
     15           i. If dn is not an element of declaredVarNames, then
     16              1. Perform ! envRec.CreateMutableBinding(dn, false).
     17              2. Call envRec.InitializeBinding(dn, undefined).
     18              3. Append dn to declaredVarNames.
     19    [...]
     20 includes: [fnGlobalObject.js]
     21 flags: [module]
     22 ---*/
     23 
     24 var global = fnGlobalObject();
     25 
     26 assert.sameValue(test262, undefined, 'value is initialized to `undefined`');
     27 assert.sameValue(
     28  Object.getOwnPropertyDescriptor(global, 'test262'), undefined
     29 );
     30 
     31 var test262 = null;
     32 
     33 assert.sameValue(test262, null, 'binding is mutable');
     34 assert.sameValue(
     35  Object.getOwnPropertyDescriptor(global, 'test262'),
     36  undefined,
     37  'global binding is not effected by evaluation of declaration'
     38 );
     39 
     40 reportCompare(0, 0);