mirror of https://github.com/tc39/test262.git
106 lines
3.2 KiB
JavaScript
106 lines
3.2 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 a corresponding global property that is
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non-configurable but *not* a writable and configurable data property.
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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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[...]
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6. If existingProp.[[Configurable]] is true, return true.
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7. If IsDataDescriptor(existingProp) is true and existingProp has attribute
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values {[[Writable]]: true, [[Enumerable]]: true}, return true.
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8. Return false.
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---*/
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Object.defineProperty(
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this,
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'data1',
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{ configurable: false, value: 0, writable: true, enumerable: false }
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);
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Object.defineProperty(
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this,
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'data2',
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{ configurable: false, value: 0, writable: false, enumerable: true }
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);
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Object.defineProperty(
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this,
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'data3',
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{ configurable: false, value: 0, writable: false, enumerable: false }
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);
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Object.defineProperty(
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this,
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'accessor1',
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{
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configurable: false,
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get: function() {},
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set: function() {},
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enumerable: true
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}
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);
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Object.defineProperty(
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this,
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'accessor2',
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{
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configurable: false,
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get: function() {},
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set: function() {},
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enumerable: true
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}
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);
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assert.throws(TypeError, function() {
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$262.evalScript('var x; function data1() {}');
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}, 'writable, non-enumerable data property');
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assert.throws(ReferenceError, function() {
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x;
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}, 'bindings not created for writable, non-enumerable data property');
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assert.throws(TypeError, function() {
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$262.evalScript('var x; function data2() {}');
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}, 'non-writable, enumerable data property');
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assert.throws(ReferenceError, function() {
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x;
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}, 'bindings not created for non-writable, enumerable data property');
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assert.throws(TypeError, function() {
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$262.evalScript('var x; function data3() {}');
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}, 'non-writable, non-enumerable data property');
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assert.throws(ReferenceError, function() {
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x;
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}, 'bindings not created for non-writable, non-enumerable data property');
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assert.throws(TypeError, function() {
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$262.evalScript('var x; function accessor1() {}');
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}, 'enumerable accessor property');
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assert.throws(ReferenceError, function() {
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x;
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}, 'bindings not created for enumerableaccessor property');
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assert.throws(TypeError, function() {
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$262.evalScript('var x; function accessor2() {}');
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}, 'non-enumerable accessor property');
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assert.throws(ReferenceError, function() {
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x;
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}, 'bindings not created for non-enumerableaccessor property');
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