public void EmptyVertex()
{
var vertex = new AdjencyListVertex <double>(1.3);
var vertex2 = new AdjencyListVertex <double>(1);
Assert.AreEqual(1.3, vertex.Value);
Assert.AreEqual(0, vertex.Count());
Assert.AreEqual(0, vertex.Neighbors().Count());
Assert.IsNull(vertex.GetEnumerator().Current);
Assert.IsFalse(vertex.IsAdjacent(vertex2));
var iterator = vertex.GetEnumerator();
while (iterator.MoveNext())
{
Assert.Fail();
}
}
