java - JMS MockTopic message not picked up by message listener? -

i trying write junit test show jms subscriber's start() function kicks off message listener topic (and messages not being consumed before start() called).

i running issue messages placed on topic before start() function called not processed once start() called. messages placed on topic after start() called processed immediately.

mocktopic topicwriter = getmocktopic(topic);  // publish message listener pick mockobjectmessage objectmessage = new mockobjectmessage(message); objectmessage.setbooleanproperty("broadcast", true);  topicwriter.addmessage(objectmessage);  // message doesn't consumed because subscriber has not been started //...assert message not processed... (**succeeds**)  // start subscriber/listener subscriber.start();  //...assert messages sitting on topic processed... (**fails**)  // publish message listener pick topicwriter.addmessage(objectmessage);  //...assert message gets processed... (**succeeds**) 

while shows listener not running before start(), kicking off message listener should cause messages on topic processed.

i've attempted make sure persistency wasn't cause adding:

    objectmessage.setjmsdeliverymode(deliverymode.persistent); 

but did not help.

actually running program seems indicate messages residing on topic processed on start(). know why messages on mocktopic might not getting processed @ start()? limitation of mocktopic?

i'm not totally clear if mocktopic issue, respect standard jms, not expect started listener receive messages published before started unless durable subscription. persistence neither here nor there.