@Test
public void getBrokers() {

  final Broker broker1 = new Broker(1, "rack", new ArrayList<>());
  final Broker broker2 = new Broker(2, "rack", new ArrayList<>());
  final Broker broker3 = new Broker(3, "rack", new ArrayList<>());
  final HashMap<Integer, Broker> map = new HashMap<>();
  map.put(1, broker1);
  map.put(2, broker2);
  map.put(3, broker3);
  underTest = new WeighBridgeController(new AtomicReference<>(broker1), map);
  assertEquals(ImmutableList.of(broker1, broker2, broker3), underTest.getAllBrokers());
}