/// <summary>
/// Initializes a new instance of the <see cref="UnorientedGraphEdge"/> class.
/// </summary>
/// <param name="from">The node from which the edge starts.</param>
/// <param name="to">The node where the edge ends.</param>
public UnorientedGraphEdge(GraphNode from, GraphNode to)
: base(from, to)
{
Contract.Requires(from != null);
Contract.Requires(to != null);
from.AddIncomingEdge(this);
to.AddOutgoingEdge(this);
}
public void AddIncomingEdge_success()
{
var node = new GraphNode();
var fromNode = new GraphNode();
var edge = Mock.Create<GraphEdge>();
edge.Arrange(e => e.From).Returns(fromNode);
node.AddIncomingEdge(edge);
Assert.AreEqual(1, node.IncomingEdges.Count);
Assert.AreEqual(edge, node.IncomingEdges.First());
Assert.AreEqual(0, node.OutgoingEdges.Count);
Assert.AreEqual(1, node.ConnectedEdges.Count);
Assert.AreEqual(edge, node.ConnectedEdges.First());
Assert.AreEqual(1, node.ConnectedNodes.Count);
Assert.AreEqual(fromNode, node.ConnectedNodes.First());
}