pkg/unittest: fixed asserts around currentTestCase

pkg/unittest/lib/src/config.dart

Index: pkg/unittest/lib/src/config.dart
diff --git a/pkg/unittest/lib/src/config.dart b/pkg/unittest/lib/src/config.dart
index cbedfb3d7cba3430b87fbd63de62794b089c60e0..8e07881cc50d4b4c2b5be509e6e127fbabd67a70 100644
--- a/pkg/unittest/lib/src/config.dart
+++ b/pkg/unittest/lib/src/config.dart
@@ -52,6 +52,8 @@ class Configuration {
    * a test suite.
    */
   void onTestStart(TestCase testCase) {
+    assert(testCase != null);
+    assert(_currentTestCase == null);
     _currentTestCase = testCase;
   }
 
@@ -60,7 +62,11 @@ class Configuration {
    * a test suite.
    */
   void onTestResult(TestCase testCase) {
-    _currentTestCase = null;
+    assert(testCase != null);
+    if(_currentTestCase != null) {

[Siggi Cherem (dart-lang), 2013/02/26 19:37:37]

nit: since this is just for assertions and nothing else, we could do this inline
instead:
assert(_currentTestCase == null || _currentTestCase == testCase);

+      assert(_currentTestCase == testCase);
+      _currentTestCase = null;
+    }
   }
 
   /**