// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart = 2.9

/// @assertion abstract void scheduleMicrotask(void f())
/// Runs f asynchronously.
/// @description Checks that f is run asynchronously.
/// @author ilya


import "dart:async";
import "../../../Utils/expect.dart";

main() {
  var x;

  Zone.current.scheduleMicrotask(() {
    x = 1;
    asyncEnd();
  });

  Expect.isNull(x);

  asyncStart();
}