consumer.getChannel().send(mec);
// Provider side
InOptionalOut mep = (InOptionalOut) provider.getChannel().accept(100L);
assertNotNull(mep);
assertEquals(ExchangeStatus.ACTIVE, mep.getStatus());
mep.setFault(mep.createFault());
provider.getChannel().send(mep);
// Consumer side
mec = (InOptionalOut) consumer.getChannel().accept(100L);
assertEquals(ExchangeStatus.ACTIVE, mec.getStatus());
assertNotNull(mec.getFault());