Run dart2js tests unmodified in browser.

dart/pkg/unittest/config.dart

Index: dart/pkg/unittest/config.dart
diff --git a/dart/pkg/unittest/config.dart b/dart/pkg/unittest/config.dart
index 34693dde24f6b99fea5b0c1e0c69527979deaec2..5d53912456ad730eca511d119da0287413309db8 100644
--- a/dart/pkg/unittest/config.dart
+++ b/dart/pkg/unittest/config.dart
@@ -37,7 +37,9 @@ class Configuration {
    * tell the vm or browser that tests are still running and the process should
    * wait until they are done.
    */
-  void onStart() {}
+  void onStart() {
+    $$postGlobalMessage('unittest-suite-wait-for-done');

[ngeoffray, 2012/09/10 08:51:14]

As discussed, it would be nice to be able to use print here instead.

[ahe, 2012/09/10 10:35:59]

Done.

+  }
 
   /**
    * Called when each test starts. Useful to show intermediate progress on
@@ -121,8 +123,11 @@ class Configuration {
       print('$passed PASSED, $failed FAILED, $errors ERRORS');
     }
 
-    // An exception is used by the test infrastructure to detect failure.
-    if (!success) throw new Exception("Some tests failed.");
+    if (success) {
+      $$postGlobalMessage('unittest-suite-success');
+    } else {
+      throw new Exception('Some tests failed.');
+    }
   }
 
   String _indent(String str) {