public void Test_IsParent_Self()
{
GraphNode<string> graphNode = new GraphNode<string>(string.Empty);
Assert.That(!graphNode.IsParent(graphNode));
}
public void Test_IsParent_ChildsParent()
{
GraphNode<string> parentGraphNode = new GraphNode<string>("parent");
GraphNode<string> childGraphNode = new GraphNode<string>("child");
parentGraphNode.AddChild(childGraphNode);
Assert.That(childGraphNode.IsParent(parentGraphNode));
}