@Test
public void testNoFile() {

  TableMapping mapping = new TableMapping();
  Configuration conf = new Configuration();
  mapping.setConf(conf);
  List<String> names = new ArrayList<String>();
  names.add("a.b.c");
  names.add("1.2.3.4");
  List<String> result = mapping.resolve(names);
  assertEquals(names.size(), result.size());
  assertEquals(NetworkTopology.DEFAULT_RACK, result.get(0));
  assertEquals(NetworkTopology.DEFAULT_RACK, result.get(1));
}