@Test
public void testCreate() {

  final String key = randomUUID().toString();
  final String v1 = randomUUID().toString();
  final String v2 = randomUUID().toString();
  InMemoryConfiguration conf1 = new InMemoryConfiguration();
  conf1.define(key, v1);
  InMemoryConfiguration conf2 = new InMemoryConfiguration();
  conf1.define(key, v2);
  Configuration conf = HierachicalConfiguration.create(conf1, conf2);
  assertEquals(v2, conf.get(key));
}