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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
49 lines
2.0 KiB
JavaScript
49 lines
2.0 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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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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function brandNew() {}
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