sess1.unsubscribe("non-existent subscription"); fail();
conn1 = cf.createConnection();   conn1.setClientID(CLIENT_ID1);  Session sess1 = conn1.createSession(false, Session.AUTO_ACKNOWLEDGE);  try { sess1.unsubscribe("non-existent subscription"); fail(); } catch (JMSException e) { }
   public void testDurableSubscriptionInvalidUnsubscribe() throws Exception   {      final String CLIENT_ID1 = "test-client-id1";      Connection conn1 = cf.createConnection();      conn1.setClientID(CLIENT_ID1);      Session sess1 = conn1.createSession(false, Session.AUTO_ACKNOWLEDGE);      try      {         sess1.unsubscribe("non-existent subscription");         fail();      }      catch (JMSException e)      {      }   }