test/language/global-code/script-decl-lex-var-declared-via-eval.js

// Copyright (C) 2023 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-globaldeclarationinstantiation
description: No let binding collision with existing var declaration due to eval().
info: |
  In strict mode:

  PerformEval ( x, strictCaller, direct )

  [...]
  16. If direct is true, then
    a. Let lexEnv be NewDeclarativeEnvironment(runningContext's LexicalEnvironment).
  [...]
  18. If strictEval is true, set varEnv to lexEnv.

  In sloppy mode:

  GlobalDeclarationInstantiation ( script, env )

  [...]
  3. For each element name of lexNames, do
    a. If env.HasLexicalDeclaration(name) is true, throw a SyntaxError exception.
    b. Let hasRestrictedGlobal be ? env.HasRestrictedGlobalProperty(name).
    c. NOTE: Global var and function bindings (except those that are introduced by non-strict direct eval) are non-configurable and are therefore restricted global properties.
    d. If hasRestrictedGlobal is true, throw a SyntaxError exception.
---*/

eval('var test262Var;');
eval('function test262Fn() {}');

$262.evalScript('let test262Var = 1;');
assert.sameValue(test262Var, 1);

$262.evalScript('const test262Fn = 2;');
assert.sameValue(test262Fn, 2);