Get codebase ready for actually supporting versioning.

utils/tests/pub/version_test.dart

Index: utils/tests/pub/version_test.dart
diff --git a/utils/tests/pub/version_test.dart b/utils/tests/pub/version_test.dart
index 8ff317cd5f20c8c8195760d80a646b6a323a0a51..be84b28ab1b3816ca22e3ff24c2581f9ef4b1e51 100644
--- a/utils/tests/pub/version_test.dart
+++ b/utils/tests/pub/version_test.dart
@@ -5,10 +5,15 @@
 #library('version_test');
 
 #import('../../../lib/unittest/unittest.dart');
+#import('../../pub/utils.dart');
 #import('../../pub/version.dart');
 
 main() {
   group('Version', () {
+    test('none', () {
+      expect(Version.none.toString()).equals('0.0.0');
+    });
+
     group('constructor', () {
       test('throws on negative numbers', () {
         throwsIllegalArg(() => new Version(-1, 1, 1));