QuiesceCallback cbk = Skeleton.newMock(QuiesceCallback.class);
QuiesceParticipant p = (QuiesceParticipant) ctx.getService(ctx.getServiceReference(QuiesceParticipant.class.getName()));
p.quiesce(cbk, Collections.singletonList(persistenceBundle));
Thread.sleep(100);
Skeleton.getSkeleton(cbk).assertCalledExactNumberOfTimes(new MethodCall(QuiesceCallback.class,
"bundleQuiesced", Bundle[].class), 1);