@Before
  public void setUp() throws Exception {
    master = new MockMasterServices(HBASE_TESTING_UTILITY.getConfiguration());
    master.start(10, null);
  }
Tests for OldWALsDirSizeChore Here we are using the {@link MockMasterServices} to mock the Hbase
Master. Chore's won't be running automatically; we need to run every time.
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestOldWALsDirSizeChore.java