Abort unit tests in the event of async failure while awaiting a future.

pkg/unittest/lib/src/test_case.dart

Index: pkg/unittest/lib/src/test_case.dart
diff --git a/pkg/unittest/lib/src/test_case.dart b/pkg/unittest/lib/src/test_case.dart
index 03eafd290d6211b421dccba4135c292c7e08559f..cde0eeed9e51abed6a1759ce13d4f6e1775989d9 100644
--- a/pkg/unittest/lib/src/test_case.dart
+++ b/pkg/unittest/lib/src/test_case.dart
@@ -99,7 +99,11 @@ class TestCase {
       _startTime = new DateTime.now();
       _runningTime = null;
       ++_callbackFunctionsOutstanding;
-      return _testFunction();
+      var testReturn = _testFunction();
+      if (testReturn is Future) {
+        ++_callbackFunctionsOutstanding;
+        testReturn.catchError(_errorHandler('Test')).whenComplete(_markCallbackComplete);

[kevmoo, 2014/07/29 19:59:01]

long line

Also, would you add a note explaining the behavior here? The control flow in
unittest is generally complex. It'd be good to explain a bit more that we have
historically. 

[Paul Berry, 2014/07/29 21:54:38]

Done.

+      }
     }).catchError(_errorHandler('Test')).then((_) {
       _markCallbackComplete();
       if (result == null) {