| // Copyright (c) 2013, 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. |
| |
| library descriptor.async; |
| |
| import 'dart:async'; |
| import 'dart:io' as io; |
| |
| import '../../descriptor.dart' as descriptor; |
| import '../../scheduled_test.dart'; |
| import '../utils.dart'; |
| import 'utils.dart'; |
| |
| /// A descriptor that wraps a [Future<Entry>] and forwards all asynchronous |
| /// operations to the result of the future. It's designed for use when the |
| /// full filesystem description isn't known when initializing the schedule. |
| /// |
| /// Async descriptors don't support [load], since their names aren't |
| /// synchronously available. |
| class Async extends descriptor.Entry { |
| /// The [Future] that will complete to the [Entry] this descriptor is |
| /// wrapping. |
| final Future<descriptor.Entry> future; |
| |
| Async(this.future) |
| : super('<async descriptor>'); |
| |
| Future create([String parent]) => |
| schedule(() => future.then((entry) => entry.create(parent))); |
| |
| Future validate([String parent]) => |
| schedule(() => future.then((entry) => entry.validate(parent))); |
| |
| Stream<List<int>> load(String path) => errorStream("Async descriptors don't " |
| "support load()."); |
| |
| Stream<List<int>> read() => errorStream("Async descriptors don't support " |
| "read()."); |
| |
| String describe() => "async descriptor"; |
| } |