Allow to specify time when creates a mapping event instance

Change-Id: Id4d9583a8d43d8a6e0913393d35a222b9688b0d2
diff --git a/apps/mappingmanagement/api/src/test/java/org/onosproject/mapping/MappingEventTest.java b/apps/mappingmanagement/api/src/test/java/org/onosproject/mapping/MappingEventTest.java
index 2da8863..7e21085 100644
--- a/apps/mappingmanagement/api/src/test/java/org/onosproject/mapping/MappingEventTest.java
+++ b/apps/mappingmanagement/api/src/test/java/org/onosproject/mapping/MappingEventTest.java
@@ -77,6 +77,18 @@
     }
 
     /**
+     * Tests the constructor where a time is passed in.
+     */
+    @Test
+    public void testTimeConstructor() {
+        final long time = 123L;
+        final Mapping mapping = mockMapping(1, DEVICE_ID_1);
+        final MappingEvent event =
+                new MappingEvent(MappingEvent.Type.MAPPING_REMOVE_REQUESTED, mapping, time);
+        validateEvent(event, MappingEvent.Type.MAPPING_REMOVE_REQUESTED, mapping, time);
+    }
+
+    /**
      * Tests creation of a MappingEvent.
      */
     @Test