pkg/unittest: fix TestCase.runningTime

pkg/unittest/lib/src/test_case.dart

 // Copyright (c) 2011, 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.
 
 part of unittest;
 
 /**
  * testcase.dart: this file is sourced by unittest.dart. It defines [TestCase]
  * and assumes unittest defines the type [TestFunction].
  */
@@ skipping 102 matching lines @@
     message = '';
     _doneTeardown = false;
     var rtn = _setUp == null ? null : _setUp();
     if (rtn is Future) {
       rtn.then((_) => _runTest())
          .catchError((e) {
           _prepTest();
           // Calling error() will result in the tearDown being done.
           // One could debate whether tearDown should be done after
           // a failed setUp. There is no right answer, but doing it
-          // seems to be the more conservative approach, because 
+          // seems to be the more conservative approach, because
           // unittest will not stop at a test failure.
           error("$description: Test setup failed: ${e.error}");
         });
     } else {
       var f = _runTest();
       if (f != null) {
         return f;
       }
     }
     if (result == null) { // Not complete.
@@ skipping 21 matching lines @@
     } else {
       result = testResult;
       _config.onTestResultChanged(this);
     }
   }
 
   void _complete(String testResult,
                 [String messageText = '',
                  String stack = '']) {
     if (runningTime == null) {
-      // TODO(gram): currently the duration measurement code is blocked
-      // by issue 4437. When that is fixed replace the line below with:
-      //    runningTime = new DateTime.now().difference(startTime);
-      runningTime = new Duration(milliseconds: 0);
+      runningTime = new DateTime.now().difference(startTime);
     }
     _setResult(testResult, messageText, stack);
     if (!_doneTeardown) {
       _doneTeardown = true;
       if (_tearDown != null) {
         var rtn = _tearDown();
         if (rtn is Future) {
           rtn.then((_) {
             _notifyComplete();
           })
@@ skipping 30 matching lines @@
   void error(String messageText, [String stack = '']) {
     _complete(ERROR, messageText, stack);
   }
 
   void markCallbackComplete() {
     if (--callbackFunctionsOutstanding == 0 && !isComplete) {
       pass();
     }
   }
 }