// write existed owner info with right version
toManager.writeOwnerInfo(topic, newOwner, v1, writeCallback, null);
res = writeCallback.queue.take();
Assert.assertEquals(null, res.right());
Version v2 = res.left();
Assert.assertEquals(Version.Occurred.AFTER, v2.compare(v1));
// read owner info
toManager.readOwnerInfo(topic, readCallback, null);
hubInfo = readCallback.queue.take().left();
Assert.assertEquals(Version.Occurred.CONCURRENTLY, v2.compare(hubInfo.getVersion()));