public void Can_combine()
{
var sut = new WordCombinationPairWithExactResultingWordLengthAndAlsoInInputFinder(6);
var words = new [] { "fo", "obar", "foobar", "rhu", "barb" };
var result = sut.FindAllCombinations(
words.Select(w => new InputWord(w)).ToList());
Assert.NotNull(result);
Assert.Equal(1, result.Count);
Assert.True(result.All(w => w.Length == 6));
Assert.Contains(result, w => w.Value == "foobar");
}