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// |reftest| skip-if(!xulRuntime.shell) -- needs drainJobQueue
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
const AsyncFunction = async function(){}.constructor;
class MyAsync extends AsyncFunction {}
// MyGen inherits from %AsyncFunction%.
assertEq(Object.getPrototypeOf(MyAsync), AsyncFunction);
// MyGen.prototype inherits from %AsyncFunctionPrototype%.
assertEq(Object.getPrototypeOf(MyAsync.prototype), AsyncFunction.prototype);
var fn = new MyAsync("return await 'ok';");
// fn inherits from MyAsync.prototype.
assertEq(Object.getPrototypeOf(fn), MyAsync.prototype);
// Ensure the new async function can be executed.
var promise = fn();
// promise inherits from %Promise.prototype%.
assertEq(Object.getPrototypeOf(promise), Promise.prototype);
// Computes the expected result.
assertEventuallyEq(promise, "ok");
if (typeof reportCompare === "function")
reportCompare(0, 0);
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