mirror of https://github.com/tc39/test262.git
72 lines
2.4 KiB
JavaScript
72 lines
2.4 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 variable where permissible
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info: |
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[...]
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11. Let declaredVarNames be a new empty List.
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12. For each d in varDeclarations, do
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a. If d is a VariableDeclaration or a ForBinding, then
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i. For each String vn in the BoundNames of d, do
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1. If vn is not an element of declaredFunctionNames, then
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a. Let vnDefinable be ? envRec.CanDeclareGlobalVar(vn).
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b. If vnDefinable is false, throw a TypeError exception.
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c. If vn is not an element of declaredVarNames, then
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i. Append vn to declaredVarNames.
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[...]
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18. For each String vn in declaredVarNames, in list order do
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a. Perform ? envRec.CreateGlobalVarBinding(vn, false).
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[...]
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8.1.1.4.15 CanDeclareGlobalVar
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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 hasProperty be ? HasOwnProperty(globalObject, N).
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5. If hasProperty is true, return true.
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6. Return ? IsExtensible(globalObject).
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includes: [propertyHelper.js]
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---*/
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$262.evalScript('var brandNew;');
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assert.sameValue(
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this.brandNew, undefined, '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(
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this,
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'configurable',
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{ configurable: true, writable: false, enumerable: false, value: 0 }
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);
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Object.defineProperty(
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this,
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'nonConfigurable',
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{ configurable: false, writable: false, enumerable: false, 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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$262.evalScript('var configurable;');
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assert.sameValue(configurable, 0, 'like-named configurable property');
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verifyNotEnumerable(this, 'configurable');
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verifyNotWritable(this, 'configurable');
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verifyConfigurable(this, 'configurable');
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$262.evalScript('var nonConfigurable;');
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assert.sameValue(nonConfigurable, 0, 'like-named non-configurable property');
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verifyNotEnumerable(this, 'nonConfigurable');
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verifyNotWritable(this, 'nonConfigurable');
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verifyNotConfigurable(this, 'nonConfigurable');
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