New testrunner that runs the test pipleine in an isolate.

utils/testrunner/delete_task.dart

-// Copyright (c) 2012, 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.
-
-/** A simple pipeline task to delete a file. */
-class DeleteTask extends PipelineTask {
-  final String _filenameTemplate;
-
-  DeleteTask(this._filenameTemplate);
-
-  execute(Path testfile, List stdout, List stderr, bool logging,
-              Function exitHandler) {
-    var fname = expandMacros(_filenameTemplate, testfile);
-    deleteFile(fname);
-    if (logging) {
-      stdout.add('Removing $fname');
-    }
-    exitHandler(0);
-  }
-}