Token min = part.getMinimumToken();
Token mid = part.midpoint(min, min);
validator.prepare(store);
// add a row with the minimum token
validator.add(new CompactedRow(new DecoratedKey(min, "nonsense!"),
new DataOutputBuffer()));
// and a row after it
validator.add(new CompactedRow(new DecoratedKey(mid, "inconceivable!"),
new DataOutputBuffer()));
validator.complete();
// confirm that the tree was validated
assert null != validator.tree.hash(new Range(min, min));