public void ShouldReplaceNodeInAll()
{
// arrange
var graph = new Graph();
var firstNode = new SampleNode("firstNode");
var secondNode = new SampleNode("secondNode");
graph.AddNode(firstNode);
graph.AddNode(secondNode);
var inboundLink = new SampleLink();
graph.AddLink(secondNode, firstNode, inboundLink);
var outboundLink = new SampleLink();
graph.AddLink(firstNode, secondNode, outboundLink);
var newNode = new SampleNode("replacedFirstNode");
// act
graph.ReplaceNode(firstNode, newNode);
// Assert
Assert.That(graph.Nodes, Has.No.Member(firstNode));
Assert.That(graph.Nodes, Has.Member(newNode));
Assert.That(inboundLink.Target, Is.SameAs(newNode));
Assert.That(newNode.InboundLinks, Has.Member(inboundLink));
Assert.That(outboundLink.Source, Is.SameAs(newNode));
Assert.That(newNode.OutboundLinks, Has.Member(outboundLink));
}