tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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instn-local-bndng-gen.js (1561B)

      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 generator function declarations
      8 esid: sec-moduledeclarationinstantiation
      9 info: |
     10    [...]
     11    15. For each element d in varDeclarations do
     12        a. For each element dn of the BoundNames of d do
     13           i. If dn is not an element of declaredVarNames, then
     14              1. Perform ! envRec.CreateMutableBinding(dn, false).
     15              2. Call envRec.InitializeBinding(dn, undefined).
     16              3. Append dn to declaredVarNames.
     17    [...]
     18 includes: [fnGlobalObject.js]
     19 flags: [module]
     20 ---*/
     21 
     22 var global = fnGlobalObject();
     23 
     24 assert.sameValue(
     25  typeof test262, 'function', 'generator function value is hoisted'
     26 );
     27 assert.sameValue(
     28  test262().next().value,
     29  'test262',
     30  'hoisted generator function value is correct'
     31 );
     32 assert.sameValue(
     33  Object.getOwnPropertyDescriptor(global, 'test262'), undefined
     34 );
     35 
     36 test262 = null;
     37 assert.sameValue(test262, null, 'binding is mutable');
     38 assert.sameValue(
     39  Object.getOwnPropertyDescriptor(global, 'test262'), undefined
     40 );
     41 
     42 function* test262() { return 'test262'; }
     43 
     44 assert.sameValue(
     45  test262, null, 'binding is not effected by evaluation of declaration'
     46 );
     47 assert.sameValue(
     48  Object.getOwnPropertyDescriptor(global, 'test262'),
     49  undefined,
     50  'global binding is not effected by evaluation of declaration'
     51 );
     52 
     53 reportCompare(0, 0);