Roll back r18349.

pkg/scheduled_test/lib/scheduled_test.dart

Index: pkg/scheduled_test/lib/scheduled_test.dart
diff --git a/pkg/scheduled_test/lib/scheduled_test.dart b/pkg/scheduled_test/lib/scheduled_test.dart
index 26a67323278590255e5277095d9d2c0123e47fdf..23a060ff052cfc5764980f6603abda3411a80eaa 100644
--- a/pkg/scheduled_test/lib/scheduled_test.dart
+++ b/pkg/scheduled_test/lib/scheduled_test.dart
@@ -2,6 +2,8 @@
 // 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.
 
+// TODO(nweiz): Keep track of and display multiple errors so there's more
+// visibility into cascading errors.
 // TODO(nweiz): Add timeouts to scheduled tests.
 // TODO(nweiz): Add support for calling [schedule] while the schedule is already
 // running.
@@ -192,9 +194,7 @@ void _test(String description, void body(), Function testFn) {
       asyncDone();
     }).catchError((e) {
       if (e is ScheduleError) {
-        assert(e.schedule.errors.contains(e));
-        assert(e.schedule == currentSchedule);
-        unittest.registerException(e.schedule.errorString());
+        unittest.registerException(new ExpectException(e.toString()));
       } else if (e is AsyncError) {
         unittest.registerException(e.error, e.stackTrace);
       } else {