Change the way Patterns work in scheduled_test/descriptor.

pkg/scheduled_test/lib/src/descriptor/utils.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.utils;
-
-import 'dart:io';
-
-import '../../../../../pkg/pathos/lib/path.dart' as path;
-
-/// Returns a single filesystem entry within [parent] whose name matches
-/// [pattern]. If [pattern] is a string, looks for an exact match; otherwise,
-/// looks for an entry that contains [pattern].
-///
-/// If there are no entries in [parent] matching [pattern], or more than one,
-/// this will throw an exception.
-///
-/// [type] is used for error reporting. It should be capitalized.
-String entryMatchingPattern(String type, String parent, Pattern pattern) {
-  if (pattern is String) {
-    var fullPath = path.join(parent, pattern);
-    if (new File(fullPath).existsSync() || new Directory(fullPath).existsSync()) {
-      return fullPath;
-    }
-    throw "$type not found: '$fullPath'.";
-  }
-
-  var matchingEntries = new Directory(parent).listSync()
-      .map((entry) => entry is File ? entry.fullPathSync() : entry.path)
-      .where((entry) => path.basename(entry).contains(pattern))
-      .toList();
-  matchingEntries.sort();
-
-  if (matchingEntries.length == 0) {
-    throw "No entry found in '$parent' matching ${describePattern(pattern)}.";
-  } else if (matchingEntries.length > 1) {
-    throw "Multiple entries found in '$parent' matching "
-          "${describePattern(pattern)}:\n"
-      "${matchingEntries.map((entry) => '* $entry').join('\n')}";
-  } else {
-    return matchingEntries.first;
-  }
-}
-
-/// Returns a human-readable description of [pattern].
-String describePattern(Pattern pattern) {
-  if (pattern is String) return "'$pattern'";
-  if (pattern is! RegExp) return '$pattern';
-
-  var flags = new StringBuffer();
-  if (!pattern.isCaseSensitive) flags.write('i');
-  if (pattern.isMultiLine) flags.write('m');
-  return '/${pattern.pattern}/$flags';
-}