public void testRowComparator() {
    sortedTable = TreeBasedTable.create();
    assertThat(sortedTable.rowComparator()).isEqualTo(Ordering.natural());

    sortedTable = TreeBasedTable.create(Collections.reverseOrder(), Ordering.usingToString());
    assertThat(sortedTable.rowComparator()).isEqualTo(Collections.reverseOrder());
  }

  public void testColumnComparator() {
    sortedTable = TreeBasedTable.create();