mirror of https://github.com/tc39/test262.git
42 lines
1.5 KiB
JavaScript
42 lines
1.5 KiB
JavaScript
// 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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esid: sec-globaldeclarationinstantiation
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es6id: 15.1.8
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description: >
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Declaration of function when there is no corresponding global property and
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the global object is non-extensible
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info: |
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[...]
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9. Let declaredFunctionNames be a new empty List.
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10. For each d in varDeclarations, in reverse list order do
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a. If d is neither a VariableDeclaration or a ForBinding, then
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i. Assert: d is either a FunctionDeclaration or a
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GeneratorDeclaration.
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ii. NOTE If there are multiple FunctionDeclarations for the same name,
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the last declaration is used.
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iii. Let fn be the sole element of the BoundNames of d.
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iv. If fn is not an element of declaredFunctionNames, then
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1. Let fnDefinable be ? envRec.CanDeclareGlobalFunction(fn).
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2. If fnDefinable is false, throw a TypeError exception.
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8.1.1.4.16 CanDeclareGlobalFunction
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1. Let envRec be the global Environment Record for which the method was
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invoked.
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2. Let ObjRec be envRec.[[ObjectRecord]].
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3. Let globalObject be the binding object for ObjRec.
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4. Let existingProp be ? globalObject.[[GetOwnProperty]](N).
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5. If existingProp is undefined, return ? IsExtensible(globalObject).
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---*/
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var executed = false;
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Object.preventExtensions(this);
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assert.throws(TypeError, function() {
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$.evalScript('executed = true; function test262() {}');
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});
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assert.sameValue(executed, false);
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