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// Copyright (C) 2018 Valerie Young. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-asyncgeneratorfunction
description: Definition of instance `length` property
info: |
AsyncGeneratorFunction ( p1, p2, … , pn, body )
...
3. Return CreateDynamicFunction(C, NewTarget, "async generator", args).
Runtime Semantics: CreateDynamicFunction
...
// the parameter "args" is sliced into "parameters" and "body"
26. Perform FunctionInitialize(F, Normal, parameters, body, scope).
...
FunctionInitialize
...
2. Let len be the ExpectedArgumentCount of ParameterList.
3. Perform ! DefinePropertyOrThrow(F, "length",
PropertyDescriptor{[[Value]]: len, [[Writable]]: false, [[Enumerable]]:
false, [[Configurable]]: true}).
...
includes: [propertyHelper.js]
features: [async-iteration]
---*/
var AsyncGeneratorFunction = Object.getPrototypeOf(async function* () {}).constructor;
var instance = AsyncGeneratorFunction()
verifyProperty(AsyncGeneratorFunction(), "length", {
value: 0,
enumerable: false,
writable: false,
configurable: true,
});
assert.sameValue(AsyncGeneratorFunction('').length, 0, "test 1");
assert.sameValue(AsyncGeneratorFunction('x').length, 0, "test 2");
assert.sameValue(AsyncGeneratorFunction('x', '').length, 1, "test 3");
assert.sameValue(AsyncGeneratorFunction('x', 'y', '').length, 2, "test 4");
assert.sameValue(AsyncGeneratorFunction('x, y', '').length, 2, "test 5");
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