[ONOS-4352]Defect fix for unsupported types.

Change-Id: I5c1425518422492de8e108c54ea82f0c85812157
diff --git a/src/test/java/org/onosproject/yangutils/parser/impl/listeners/NotificationListenerTest.java b/src/test/java/org/onosproject/yangutils/parser/impl/listeners/NotificationListenerTest.java
index 3b9907e..7da2468 100644
--- a/src/test/java/org/onosproject/yangutils/parser/impl/listeners/NotificationListenerTest.java
+++ b/src/test/java/org/onosproject/yangutils/parser/impl/listeners/NotificationListenerTest.java
@@ -66,6 +66,6 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getName(), is("if-name"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("leafref"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("string"));
     }
 }