public void Enumeration_ReturnsAllVertices()
{
var graph = new LiteralGraph("A>1>B,B-1-Z,K<1<T", true);
var v = graph.ToArray();
Sorting.QuickSort(v, 0, v.Length, Comparer <char> .Default);
TestHelper.AssertSequence(v,
'A', 'B', 'K', 'T', 'Z');
}