mirror of https://github.com/tc39/test262.git
80 lines
2.9 KiB
JavaScript
80 lines
2.9 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: Declaration of function where permissible
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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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3. Append fn to declaredFunctionNames.
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4. Insert d as the first element of functionsToInitialize.
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[...]
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17. For each production f in functionsToInitialize, do
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a. Let fn be the sole element of the BoundNames of f.
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b. Let fo be the result of performing InstantiateFunctionObject for f
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with argument env.
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c. Perform ? envRec.CreateGlobalFunctionBinding(fn, fo, false).
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[...]
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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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includes: [propertyHelper.js]
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---*/
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$.evalScript('function brandNew() {}');
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assert.sameValue(
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typeof brandNew, 'function', 'new binding on an extensible global object'
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);
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verifyEnumerable(this, 'brandNew');
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verifyWritable(this, 'brandNew');
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verifyNotConfigurable(this, 'brandNew');
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Object.defineProperty(this, 'configurable', { configurable: true, value: 0 });
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Object.defineProperty(
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this,
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'nonConfigurable',
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{ configurable: false, writable: true, enumerable: true, value: 0 }
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);
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// Prevent extensions on the global object to ensure that detail is not
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// considered by any of the declarations which follow.
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Object.preventExtensions(this);
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$.evalScript('function configurable() {}');
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assert.sameValue(
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typeof configurable, 'function', 'like-named configurable property'
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);
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verifyEnumerable(this, 'configurable')
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verifyWritable(this, 'configurable');
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verifyNotConfigurable(this, 'configurable');
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$.evalScript('function nonConfigurable() {}');
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assert.sameValue(
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typeof nonConfigurable,
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'function',
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'like-named non-configurable data property that is writable and enumerable'
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);
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verifyEnumerable(this, 'nonConfigurable');
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verifyWritable(this, 'nonConfigurable');
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verifyNotConfigurable(this, 'nonConfigurable');
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