Adding Angular's DI package & Dart unittests which test it.

pkg/third_party/di/test/di_test.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 testrunner_test;
+
+library angular.di.test;

[Siggi Cherem (dart-lang), 2013/12/20 23:40:20]

just to document what we discussed - let's rename pkg/third_party/di/ to
pkg/third_party/di_test/

that way the symlink in packages/ always resolves to third_party/pkg/di/

Also, we might want to add a pubspec.yaml file to declare the dependency on 'di'
explicitly, but also to indicate that this is not intended to be published.
(e.g. put a comment of why there shouldn't be a 'version' entry)

[blois, 2013/12/21 00:00:12]

Done. Skipped the pubspec.yaml as it doesn't technically have a dependency on
di, since it needs to use the relative path to access the test files.

 
 import 'package:unittest/unittest.dart';
+import '../../../../third_party/pkg/di/test/main.dart' as di;
 
+/**
+ * Tests Angular's DI package
+ */
 main() {
-  group('foo', () {
-    test('bar', () {
-      expect(true, isTrue);
-    });
+
+  group('main', () {
+    di.main();
   });
 }
-