| // 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'; |
| |
| import '../../../../../pkg/pathos/lib/path.dart' as path; |
| |
| import '../../descriptor.dart' as descriptor; |
| import '../../scheduled_test.dart'; |
| import '../utils.dart'; |
| import 'utils.dart'; |
| |
| /// A descriptor that validates that no file exists with the given name. |
| /// Creating this descriptor is a no-op and loading from it is invalid. |
| class Nothing extends descriptor.Entry { |
| Nothing(Pattern name) |
| : super(name); |
| |
| Future create([String parent]) => new Future.immediate(null); |
| |
| Future validate([String parent]) => schedule(() { |
| if (parent == null) parent = descriptor.defaultRoot; |
| if (name is String) { |
| var fullPath = path.join(parent, name); |
| if (new File(fullPath).existsSync()) { |
| throw "Expected nothing to exist at '$fullPath', but found a file."; |
| } else if (new Directory(fullPath).existsSync()) { |
| throw "Expected nothing to exist at '$fullPath', but found a " |
| "directory."; |
| } else { |
| return; |
| } |
| } |
| |
| return new Directory(parent).list().toList().then((entries) { |
| var matchingEntries = entries |
| .map((entry) => entry is File ? entry.fullPathSync() : entry.path) |
| .where((entry) => path.basename(entry).contains(name)) |
| .toList(); |
| matchingEntries.sort(); |
| |
| if (matchingEntries.length == 0) return; |
| throw "Expected nothing to exist in '$parent' matching $nameDescription, " |
| "but found:\n" |
| "${matchingEntries.map((entry) => '* $entry').join('\n')}"; |
| }); |
| }, "validating $nameDescription doesn't exist"); |
| |
| Stream<List<int>> load(String pathToLoad) => errorStream("Nothing " |
| "descriptors don't support load()."); |
| |
| Stream<List<int>> read() => errorStream("Nothing descriptors don't support " |
| "read()."); |
| |
| String describe() => "nothing at $nameDescription"; |
| } |