Add DirectoryTestSuite.

utils/tests/pub/pub_tests.dart

Index: utils/tests/pub/pub_tests.dart
diff --git a/utils/tests/pub/pub_tests.dart b/utils/tests/pub/pub_tests.dart
new file mode 100644
index 0000000000000000000000000000000000000000..53456fd48cdff396c75090e8c39e45b90674bb78
--- /dev/null
+++ b/utils/tests/pub/pub_tests.dart
@@ -0,0 +1,14 @@
+// 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.
+
+#library('pub_tests');
+
+// TODO(rnystrom): Better path to unittest.
+#import('../../../lib/unittest/unittest_vm.dart');
+
+main() {
+  test('should pass', () {
+    expect(1).equals(1);
+  });
+}