using unittest via package import

tests/html/indexeddb_5_test.dart

 library IndexedDB1Test;
-import '../../pkg/unittest/lib/unittest.dart';
-import '../../pkg/unittest/lib/html_config.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
 import 'dart:async';
 import 'dart:html' as html;
 import 'dart:indexed_db' as idb;
 
 main() {
   useHtmlConfiguration();
 
   if (!idb.IdbFactory.supported) {
     return;
   }
@@ skipping 160 matching lines @@
     }).then((_) {
       transaction = db.transaction(storeName, 'readonly');
       var index = transaction.objectStore(storeName).index(indexName);
       return index.get('two');
     }).then((readValue) {
       expect(readValue, isNull);
       return transaction.completed;
     });
   });
 }