incremental step moving completion into services and adding tests

pkg/analysis_services/test/test_all.dart

Index: pkg/analysis_services/test/test_all.dart
diff --git a/pkg/analysis_services/test/test_all.dart b/pkg/analysis_services/test/test_all.dart
index 23de4a61088814c1cb509899ef767725872580c3..419bdfc2fd9c3e94afcbf29c35cb8d877688a23a 100644
--- a/pkg/analysis_services/test/test_all.dart
+++ b/pkg/analysis_services/test/test_all.dart
@@ -4,6 +4,7 @@
 
 import 'package:unittest/unittest.dart';
 
+import 'completion/test_all.dart' as completion_all;
 import 'correction/test_all.dart' as correction_all;
 import 'index/test_all.dart' as index_all;
 import 'search/test_all.dart' as search_all;
@@ -11,6 +12,7 @@ import 'search/test_all.dart' as search_all;
 /// Utility for manually running all tests.
 main() {
   groupSep = ' | ';
+  completion_all.main();
   correction_all.main();
   index_all.main();
   search_all.main();