Another test that cancels a timer.

tests/lib/async/stream_state_nonzero_timer_test.dart

 // Copyright (c) 2013, 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.
 
 // Test the event/callback protocol of the stream implementations.
 // Uses a non-zero timer so it fails on d8.
 
 library stream_state_nonzero_timer_test;
 
 import "dart:async";
@@ skipping 62 matching lines @@
          // After that, the controller stays paused until the pending queue
          // is empty.
        })
      ..expectPause(true)
      ..expectData(43)
      ..expectPause(false, () { t.close(); })
      ..expectDone()
      ..expectSubscription(false, false);
     t..subscribe()..add(42);
   });
+
+  test("$p-pause-during-callback", () {
+    var t = new StreamProtocolTest(broadcast);
+    t..expectSubscription(true, false)
+     ..expectData(42, () {
+       t.pause();
+     })
+     ..expectPause(true, () {
+       t.resume();
+     })
+     ..expectPause(false, () {
+       t.pause();
+       t.resume();
+       t.close();
+     })
+     ..expectDone()
+     ..expectSubscription(false, false);
+    t..subscribe()
+     ..add(42);
+  });
 }