anchor.diff:          wasTriggered = true;
         }
         store.triggerOnAction(action, onAction);
  -      store.listen(expectAsync((Store listenedStore) {
  +      store.listen(expectAsync1((Store listenedStore) {
           expect(listenedStore, equals(store));
           expect(wasTriggered, isTrue);
         }));
  
positive.code: 
      test('should trigger in response to an action', () {
        store.triggerOnAction(action);
        store.listen(expectAsync((Store listenedStore) {
          expect(listenedStore, equals(store));
        }));
        action();
  
negative.code:       final Action<int> _action = new Action<int>();
        int counter = 0;
        store.triggerOnAction(_action, (int payload) => counter = payload);
        store.listen(expectAsync1((Store listenedStore) {
          expect(listenedStore, equals(store));
          expect(counter, equals(17));
        }));
  