public void ThrowsIfTheToNodeIsNotInTheGraph()
{
EdgeListGraph <int> graph = new EdgeListGraph <int>();
graph.AddNode(1);
Assert.Throws <ArgumentException>(() => { graph.AddDirectedEdge(1, 2); });
}
public void AddsNewEdges()
{
//by value
EdgeListGraph <int> graph = new EdgeListGraph <int>();
graph.AddNode(1);
graph.AddNode(2);
graph.AddDirectedEdge(1, 2);
int count = graph.AllEdges.Count();
Assert.Equal(1, count);
//by node
graph = new EdgeListGraph <int>();
EdgeListNode <int> node1 = new EdgeListNode <int>(1);
EdgeListNode <int> node2 = new EdgeListNode <int>(2);
graph.AddNode(node1);
graph.AddNode(node2);
graph.AddDirectedEdge(node1, node2);
count = graph.AllEdges.Count();
Assert.Equal(1, count);
}