mirror of https://github.com/tc39/test262.git
45 lines
1.2 KiB
JavaScript
45 lines
1.2 KiB
JavaScript
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// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: >
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Mutable bindings are created in the lexical environment record prior to
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execution for class declarations
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esid: sec-moduledeclarationinstantiation
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info: |
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[...]
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17. For each element d in lexDeclarations do
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a. For each element dn of the BoundNames of d do
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i. If IsConstantDeclaration of d is true, then
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[...]
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ii. Else,
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1. Perform ! envRec.CreateMutableBinding(dn, false).
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[...]
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includes: [fnGlobalObject.js]
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flags: [module]
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---*/
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var global = fnGlobalObject();
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assert.throws(ReferenceError, function() {
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typeof test262;
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}, 'Binding is created but not initialized.');
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assert.sameValue(
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Object.getOwnPropertyDescriptor(global, 'test262'), undefined
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);
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class test262 {}
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assert.sameValue(typeof test262, 'function');
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assert.sameValue(
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Object.getOwnPropertyDescriptor(global, 'test262'), undefined
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);
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test262 = null;
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assert.sameValue(test262, null, 'binding is mutable');
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assert.sameValue(
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Object.getOwnPropertyDescriptor(global, 'test262'),
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undefined,
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'global binding is not effected by modification'
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);
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