public void ObjectToString()
{
var edge1 = new MergedEdge <int, Edge <int> >(1, 2);
var edge2 = new MergedEdge <int, Edge <int> >(2, 1);
Assert.AreEqual("1 -> 2", edge1.ToString());
Assert.AreEqual("2 -> 1", edge2.ToString());
}
