@After
  public void after() throws Exception {
    try {
      if (table != null) {
        table.close();
      }
    } finally {
      try {
        util.deleteTable(TEST_TABLE);
      } catch (IOException ioe) {
      }
    }
  }
This test runs batch mutation with Increments which have custom TimeRange. Custom Observer
records the TimeRange. We then verify that the recorded TimeRange has same bounds as the initial
TimeRange. See HBASE-15698
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestIncrementTimeRange.java