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/* 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;
// Test subclassing %AsyncFunction% works correctly.
class MyAsync extends AsyncFunction {}
var fn = new MyAsync();
assertEq(fn instanceof MyAsync, true);
assertEq(fn instanceof AsyncFunction, true);
assertEq(Object.getPrototypeOf(fn), MyAsync.prototype);
fn = Reflect.construct(MyAsync, []);
assertEq(fn instanceof MyAsync, true);
assertEq(fn instanceof AsyncFunction, true);
assertEq(Object.getPrototypeOf(fn), MyAsync.prototype);
fn = Reflect.construct(MyAsync, [], MyAsync);
assertEq(fn instanceof MyAsync, true);
assertEq(fn instanceof AsyncFunction, true);
assertEq(Object.getPrototypeOf(fn), MyAsync.prototype);
fn = Reflect.construct(MyAsync, [], AsyncFunction);
assertEq(fn instanceof MyAsync, false);
assertEq(fn instanceof AsyncFunction, true);
assertEq(Object.getPrototypeOf(fn), AsyncFunction.prototype);
// Set a different constructor as NewTarget.
fn = Reflect.construct(MyAsync, [], Array);
assertEq(fn instanceof MyAsync, false);
assertEq(fn instanceof AsyncFunction, false);
assertEq(Object.getPrototypeOf(fn), Array.prototype);
fn = Reflect.construct(AsyncFunction, [], Array);
assertEq(fn instanceof AsyncFunction, false);
assertEq(Object.getPrototypeOf(fn), Array.prototype);
// The prototype defaults to %AsyncFunctionPrototype% if null.
function NewTargetNullPrototype() {}
NewTargetNullPrototype.prototype = null;
fn = Reflect.construct(AsyncFunction, [], NewTargetNullPrototype);
assertEq(fn instanceof AsyncFunction, true);
assertEq(Object.getPrototypeOf(fn), AsyncFunction.prototype);
fn = Reflect.construct(MyAsync, [], NewTargetNullPrototype);
assertEq(fn instanceof MyAsync, false);
assertEq(fn instanceof AsyncFunction, true);
assertEq(Object.getPrototypeOf(fn), AsyncFunction.prototype);
// "prototype" property is retrieved exactly once.
var trapLog = [], getLog = [];
var ProxiedConstructor = new Proxy(AsyncFunction, new Proxy({
get(target, propertyKey, receiver) {
getLog.push(propertyKey);
return Reflect.get(target, propertyKey, receiver);
}
}, {
get(target, propertyKey, receiver) {
trapLog.push(propertyKey);
return Reflect.get(target, propertyKey, receiver);
}
}));
fn = Reflect.construct(AsyncFunction, [], ProxiedConstructor);
assertEqArray(trapLog, ["get"]);
assertEqArray(getLog, ["prototype"]);
assertEq(fn instanceof AsyncFunction, true);
assertEq(Object.getPrototypeOf(fn), AsyncFunction.prototype);
if (typeof reportCompare === "function")
reportCompare(0, 0);
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