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ECMA262 allows for an arbitrary number of "ScriptJob"s to run in a given realm. Although there is no standard mechanism for enqueuing these jobs, many implementations offer this functionality through custom APIs. In those hosts, the semantics describing script interactions are directly observable. In order to guarantee conformance to the specification in advance of a standardized API, Test262 now requires that hosts provide a $.evalScript function whose behavior is defined in the project's "INTERPRETING.md" file. Use this host-provided API to ensure that implementations correctly observe the specification text that dictates script interactions. (In writing these tests, I noticed some gaps in coverage that are observable from a single script execution. This patch includes a dedicated commit for these tests that do not require $.evalScript.) * Improve coverage of GlobalDeclarationInstantiation * Add tests for script interactions Use the host-provied `$.evalScript` method to assert conformance to the specification text that defines script interactions. * fixup! Improve coverage of GlobalDeclarationInstantiation
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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$.evalScript('var x; function data1() {}');
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}, 'writable, non-enumerable data property');
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assert.throws(ReferenceError, function() {
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x;
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}, 'bindings not created for writable, non-enumerable data property');
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assert.throws(TypeError, function() {
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$.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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$.evalScript('var x; function data3() {}');
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}, 'non-writable, non-enumerable data property');
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assert.throws(ReferenceError, function() {
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x;
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}, 'bindings not created for non-writable, non-enumerable data property');
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assert.throws(TypeError, function() {
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$.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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$.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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