DBCredentials dbCredentials = new DBCredentials();
dbCredentials.preparaDb();
DBCentro dbCentro = new DBCentro();
dbCentro.preparaDb();
DBAdmin dbAdmin = new DBAdmin();
dbAdmin.preparaDb();
assertEquals(_manager.getAdminsByAlfabetico("a", 0).size(),0);
assertEquals(_manager.getAdminsByAlfabetico("b", 0).size(),0);
assertEquals(_manager.getAdminsByAlfabetico("c", 0).size(),0);
assertEquals(_manager.getAdminsByAlfabetico("p", 0).size(),1);