public void testSynchronizeCommit() throws Exception {
SelectQuery query = new SelectQuery(MtTable1.class);
// no changes...
clientServerChannel.onSync(serverContext, new MockGraphDiff(), DataChannel.FLUSH_CASCADE_SYNC);
assertEquals(0, serverContext.performQuery(query).size());
// introduce changes
clientServerChannel.onSync(serverContext, new NodeCreateOperation(new ObjectId("MtTable1")),