| // Copyright (c) 2015, 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 |
| |
| library future_delayed_test; |
| |
| import 'package:async_helper/async_helper.dart'; |
| import "package:expect/expect.dart"; |
| import 'dart:async'; |
| |
| Future<int> createIntFuture() { |
| return new Future<int>.value(499); |
| } |
| |
| unnamed() { |
| asyncStart(); |
| new Future<int>(createIntFuture).then((x) { |
| Expect.equals(499, x); |
| asyncEnd(); |
| }); |
| } |
| |
| delayed() { |
| asyncStart(); |
| new Future<int>.delayed(const Duration(milliseconds: 2), createIntFuture) |
| .then((x) { |
| Expect.equals(499, x); |
| asyncEnd(); |
| }); |
| } |
| |
| microtask() { |
| asyncStart(); |
| new Future<int>.microtask(createIntFuture).then((x) { |
| Expect.equals(499, x); |
| asyncEnd(); |
| }); |
| } |
| |
| sync() { |
| asyncStart(); |
| new Future<int>.sync(createIntFuture).then((x) { |
| Expect.equals(499, x); |
| asyncEnd(); |
| }); |
| } |
| |
| main() { |
| asyncStart(); |
| // Test that all the Future constructors take functions that return a Future |
| // as argument. |
| // In particular the constructors must not type their argument as |
| // `T computation()`. |
| unnamed(); |
| delayed(); |
| microtask(); |
| sync(); |
| asyncEnd(); |
| } |