checkFile.delete();
HashMap map = new HashMap();
map.put("_filename", new ClientProperty("_filename", null, null, filename));
String key = XBMessage.addToKeyAndCheck(XBConnectionMetaData.JMSX_GROUP_SEQ);
map.put(key, new ClientProperty(key, null, null, "" + 0L));
callback.update("dummy", new ByteArrayInputStream("first".getBytes()), map);
map.clear();
map.put("_filename", new ClientProperty("_filename", null, null, filename));
key = XBMessage.addToKeyAndCheck(XBConnectionMetaData.JMSX_GROUP_SEQ);
map.put(key, new ClientProperty(key, null, null, "" + 1L));