public void testRowComparator() {
    sortedTable = TreeBasedTable.create();
    assertSame(Ordering.natural(), sortedTable.rowComparator());

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

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