using unittest via package import

tests/html/keyboard_event_test.dart

 library KeyboardEventTest;
-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:html';
 
 // Test that we are correctly determining keyCode and charCode uniformly across
 // browsers.
 
 main() {
 
   useHtmlConfiguration();
 
   keydownHandlerTest(KeyEvent e) {
@@ skipping 72 matching lines @@
   test('KeyEventKeyboardEvent', () {
     window.onKeyDown.listen(expectAsync((KeyboardEvent event) {
       expect(event.keyCode, 16);
     }));
     var streamDown = KeyEvent.keyDownEvent.forTarget(document.body);
     streamDown.add(new KeyEvent('keydown', keyCode: 16, charCode: 0));
   });
 }