+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.doReturn;
+import static org.opendaylight.yangtools.util.concurrent.FluentFutures.immediateFluentFuture;
+import static org.opendaylight.yangtools.util.concurrent.FluentFutures.immediateTrueFluentFuture;
+