Change the way Patterns work in scheduled_test/descriptor.

pkg/scheduled_test/lib/src/descriptor/directory.dart

-// 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.file;
-
-import 'dart:async';
-import 'dart:io' as 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 path builder to ensure that [load] uses POSIX paths.
-final path.Builder _path = new path.Builder(style: path.Style.posix);
-
-/// A descriptor describing a directory containing multiple files.
-class Directory extends descriptor.Entry {
-  /// The entries contained within this directory.
-  final Iterable<descriptor.Entry> contents;
-
-  Directory(Pattern name, this.contents)
-      : super(name);
-
-  Future create([String parent]) => schedule(() {
-    if (parent == null) parent = descriptor.defaultRoot;
-    var fullPath = path.join(parent, stringName);
-    return new io.Directory(fullPath).create(recursive: true).then((_) {
-      return Future.wait(
-          contents.map((entry) => entry.create(fullPath)).toList());
-    });
-  }, 'creating directory:\n${describe()}');
-
-  Future validate([String parent]) => schedule(() {
-    if (parent == null) parent = descriptor.defaultRoot;
-    var fullPath = entryMatchingPattern('Directory', parent, name);
-    return Future.wait(
-        contents.map((entry) => entry.validate(fullPath)).toList());
-  }, 'validating directory:\n${describe()}');
-
-  Stream<List<int>> load(String pathToLoad) {
-    return futureStream(new Future.immediate(null).then((_) {
-      if (_path.isAbsolute(pathToLoad)) {
-        throw "Can't load absolute path '$pathToLoad'.";
-      }
-
-      var split = _path.split(_path.normalize(pathToLoad));
-      if (split.isEmpty || split.first == '.' || split.first == '..') {
-        throw "Can't load '$pathToLoad' from within $nameDescription.";
-      }
-
-      var matchingEntries = contents.where((entry) =>
-          entry.stringName == split.first).toList();
-
-      if (matchingEntries.length == 0) {
-        throw "Couldn't find an entry named '${split.first}' within "
-            "$nameDescription.";
-      } else if (matchingEntries.length > 1) {
-        throw "Found multiple entries named '${split.first}' within "
-            "$nameDescription.";
-      } else {
-        var remainingPath = split.getRange(1, split.length - 1);
-        if (remainingPath.isEmpty) {
-          return matchingEntries.first.read();
-        } else {
-          return matchingEntries.first.load(_path.joinAll(remainingPath));
-        }
-      }
-    }));
-  }
-
-  Stream<List<int>> read() => errorStream("Can't read the contents of "
-      "$nameDescription: is a directory.");
-
-  String describe() {
-    var description = name;
-    if (name is! String) description = 'directory matching $nameDescription';
-    if (contents.isEmpty) return description;
-
-    var buffer = new StringBuffer();
-    buffer.writeln(description);
-    for (var entry in contents.take(contents.length - 1)) {
-      var entryString = prefixLines(entry.describe(), prefix: '|   ')
-          .replaceFirst('|   ', '|-- ');
-      buffer.writeln(entryString);
-    }
-
-    var lastEntryString = prefixLines(contents.last.describe(), prefix: '    ')
-        .replaceFirst('    ', "'-- ");
-    buffer.write(lastEntryString);
-    return buffer.toString();
-  }
-}