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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// @dart = 2.6
import 'dart:async';
import 'package:test/test.dart' hide TypeMatcher, isInstanceOf;
void main() {
test('Message loop flushes microtasks between iterations', () async {
final List<int> tasks = <int>[];
tasks.add(1);
// Flush 0 microtasks.
await Future<void>.delayed(Duration.zero);
scheduleMicrotask(() {
tasks.add(3);
});
scheduleMicrotask(() {
tasks.add(4);
});
tasks.add(2);
// Flush 2 microtasks.
await Future<void>.delayed(Duration.zero);
scheduleMicrotask(() {
tasks.add(6);
});
scheduleMicrotask(() {
tasks.add(7);
});
scheduleMicrotask(() {
tasks.add(8);
});
tasks.add(5);
// Flush 3 microtasks.
await Future<void>.delayed(Duration.zero);
tasks.add(9);
expect(tasks, <int>[1, 2, 3, 4, 5, 6, 7, 8, 9]);
});
}