public void save_saves_to_disk()
{
string oldServername, newServername = "newServerName",
oldDbname, newDbname = "newDbName";
_server = new server(constantinople.XML_FILEPATH);
oldServername = _server.Name; // this could be null or empty
oldDbname = _server.Db; // this could be null or empty
_server = new server(constantinople.XML_FILEPATH, name: newServername, db: newDbname);
_server.save();
// reload
_server = new server(constantinople.XML_FILEPATH);
// if this has gone wrong then the setting on the XML file have been lost forever
Assert.AreEqual(newServername, _server.Name);
Assert.AreEqual(newDbname, _server.Db);
// normalise - if possible
_server = new server(constantinople.XML_FILEPATH, name: oldServername, db: oldDbname);
_server.save();
}