@Test
  public void testIncrementHost() {
    String hostname = "foobar";
    counter.countUpHost(hostname, 10);
    counter.incrementHost(hostname);

    int res = counter.getHostCounts().get(Tools.encodeBase64(hostname));
    assertEquals(11, res);
  }
  @Test
  public void testGetHostCounts() {
    String host1 = "example.org";
    String host2 = "foo.example.org";
    String host3 = "example.com";

    Map expected = new HashMap<String, Integer>();
    expected.put(Tools.encodeBase64(host1), 5);
    expected.put(Tools.encodeBase64(host2), 1);
    expected.put(Tools.encodeBase64(host3), 3);

    counter.countUpStream(new ObjectId(), 5); // Add a stream count for complexity.
    counter.countUpHost(host1, 4);
    counter.countUpHost(host1, 1);
    counter.incrementHost(host2);
    counter.countUpHost(host3, 3);

    assertEquals(expected, counter.getHostCounts());
  }