@Test
    public void testDefaultClusterRouteResolutionNullRoute() {
        VisitorParameters visitorParameters = createVisitorParameters("");
        visitorParameters.setRoute((Route)null); // ensure route is null
        RoutingTable table = createDummyRoutingTable();

        createDefaultMock(visitorParameters, table);
        assertEquals("storage/cluster.foo", visitorParameters.getRoute().toString());
    }
Test that we try to get a route to the storage cluster automatically if
the provided visitor parameter route is null.
documentapi/src/test/java/com/yahoo/documentapi/messagebus/MessageBusVisitorSessionTestCase.java