Implement recursive directory deletion.

tests/standalone/src/DirectoryTest.dart

Index: tests/standalone/src/DirectoryTest.dart
diff --git a/tests/standalone/src/DirectoryTest.dart b/tests/standalone/src/DirectoryTest.dart
index 035a38c47732988cde3dfb061bebaf9350fd2bf3..5ba0d99ffdbe12afeac0976ce018c0bf1f816893 100644
--- a/tests/standalone/src/DirectoryTest.dart
+++ b/tests/standalone/src/DirectoryTest.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 //
@@ -35,12 +35,15 @@ class DirectoryTest {
       Expect.isTrue(completed, "directory listing did not complete");
       Expect.isTrue(listedDir, "directory not found");
       Expect.isTrue(listedFile, "file not found");
-      f.deleteHandler = () {
-        // TODO(ager): use async directory deletion API when available.
-        subDirectory.deleteSync();
-        directory.deleteSync();
+      directory.delete(recursive: true);

[Bill Hesse, 2012/02/02 17:24:39]

I think we need some major tests for the new recursive delete.

[Mads Ager (google), 2012/02/03 11:48:54]

I have added some more tests. It is hard to do more than test a couple of error
conditions such as non-existent directory and long path names.

+      directory.deleteHandler = () {
+        f.exists();
+        f.existsHandler = (exists) => Expect.isFalse(exists);
+        directory.exists();
+        directory.existsHandler = (exists) => Expect.isFalse(exists);
+        subDirectory.exists();
+        subDirectory.existsHandler = (exists) => Expect.isFalse(exists);
       };
-      f.delete();
     };
 
     directory.errorHandler = (error) {