public void Add_Gets_Applied_To_Graph() {
var graph = new DirectedGraph();
var a = new GraphNode("a");
var b = new GraphNode("b");
var c = new GraphNode("c");
var d = new GraphNode("d");
graph.AddNode(a);
graph.AddNode(b);
graph.AddNode(c);
graph.AddNode(d);
var graphExpression = new GraphExpression<IDirectedGraph>(graph);
var expression = new EdgeCollectionModifiersExpression<IGraphExpression>(graph, graphExpression);
expression.Add(
edges =>
{
edges.FromNodeWithName("a").ToNodeWithName("b");
edges.FromNodeWithName("c").ToNodeWithName("d");
}
);
Assert.AreEqual(graph.Edges.Count(), 2);
var edge1 = graph.Edges.First();
Assert.AreEqual(edge1.From.Node, a);
Assert.AreEqual(edge1.To.Node, b);
var edge2 = graph.Edges.Skip(1).First();
Assert.AreEqual(edge2.From.Node, c);
Assert.AreEqual(edge2.To.Node, d);
}
public void Add_Returns_Parent_Expression() {
var graph = new UndirectedGraph();
var a = new GraphNode("a");
var b = new GraphNode("b");
graph.AddNode(a);
graph.AddNode(b);
var graphExpression = new GraphExpression<IUndirectedGraph>(graph);
var expression = new EdgeCollectionModifiersExpression<IGraphExpression>(graph, graphExpression);
var instance = expression.Add(edges => edges.FromNodeWithName("a").ToNodeWithName("b"));
Assert.AreSame(instance, graphExpression);
}
