Split apart several asynchronous tests to reduce timeouts.

pkg/scheduled_test/test/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 test.descriptor.utils;
+
+import 'dart:async';
+import 'dart:io';
+
+import 'package:scheduled_test/descriptor.dart' as d;
+import 'package:scheduled_test/scheduled_test.dart';
+
+export '../utils.dart';
+
+String sandbox;
+
+void scheduleSandbox() {
+  schedule(() {
+    return new Directory('').createTemp().then((dir) {
+      sandbox = dir.path;
+      d.defaultRoot = sandbox;
+    });
+  });
+
+  currentSchedule.onComplete.schedule(() {
+    d.defaultRoot = null;
+    if (sandbox == null) return;
+    var oldSandbox = sandbox;
+    sandbox = null;
+    return new Directory(oldSandbox).delete(recursive: true);
+  });
+}
+
+Future<List<int>> byteStreamToList(Stream<List<int>> stream) {
+  return stream.reduce(<int>[], (buffer, chunk) {
+    buffer.addAll(chunk);
+    return buffer;
+  });
+}
+
+Future<String> byteStreamToString(Stream<List<int>> stream) =>
+  byteStreamToList(stream).then((bytes) => new String.fromCharCodes(bytes));
+