public void with_max_distance_0_should_return_exact_matches_only()
{
var tree = new BKTree<string>(new DamerauLevenshteinStringDistanceMeasurer());
tree.Add(new BKTreeNode<string>("book")); //root
tree.Add(new BKTreeNode<string>("rook")); //1
tree.Add(new BKTreeNode<string>("nooks")); //2
tree.Add(new BKTreeNode<string>("boon")); //1->2
const string query = "boon";
const int maxDistance = 0;
var matches = tree.Matches(query, maxDistance);
Assert.That(matches.Count, Is.EqualTo(1));
Assert.That(matches.Single(), Is.EqualTo(query));
}