protected static void ContainsEdge_EquatableEdge_EdgesOnly_Test(
[NotNull] EdgeListGraph <int, EquatableEdge <int> > graph)
{
var edge1 = new EquatableEdge <int>(1, 2);
var edge2 = new EquatableEdge <int>(1, 3);
var edge3 = new EquatableEdge <int>(2, 1);
var edge4 = new EquatableEdge <int>(2, 2);
var otherEdge1 = new EquatableEdge <int>(1, 2);
Assert.IsFalse(graph.ContainsEdge(edge1));
Assert.IsFalse(graph.ContainsEdge(edge2));
Assert.IsFalse(graph.ContainsEdge(edge3));
Assert.IsFalse(graph.ContainsEdge(edge4));
Assert.IsFalse(graph.ContainsEdge(otherEdge1));
graph.AddVerticesAndEdge(edge1);
Assert.IsTrue(graph.ContainsEdge(edge1));
Assert.IsFalse(graph.ContainsEdge(edge2));
Assert.IsFalse(graph.ContainsEdge(edge3));
Assert.IsFalse(graph.ContainsEdge(edge4));
Assert.IsTrue(graph.ContainsEdge(otherEdge1));
graph.AddVerticesAndEdge(edge2);
Assert.IsTrue(graph.ContainsEdge(edge1));
Assert.IsTrue(graph.ContainsEdge(edge2));
Assert.IsFalse(graph.ContainsEdge(edge3));
Assert.IsFalse(graph.ContainsEdge(edge4));
Assert.IsTrue(graph.ContainsEdge(otherEdge1));
graph.AddVerticesAndEdge(edge3);
Assert.IsTrue(graph.ContainsEdge(edge1));
Assert.IsTrue(graph.ContainsEdge(edge2));
Assert.IsTrue(graph.ContainsEdge(edge3));
Assert.IsFalse(graph.ContainsEdge(edge4));
Assert.IsTrue(graph.ContainsEdge(otherEdge1));
graph.AddVerticesAndEdge(edge4);
Assert.IsTrue(graph.ContainsEdge(edge1));
Assert.IsTrue(graph.ContainsEdge(edge2));
Assert.IsTrue(graph.ContainsEdge(edge3));
Assert.IsTrue(graph.ContainsEdge(edge4));
Assert.IsTrue(graph.ContainsEdge(otherEdge1));
graph.AddVerticesAndEdge(otherEdge1);
Assert.IsTrue(graph.ContainsEdge(edge1));
Assert.IsTrue(graph.ContainsEdge(edge2));
Assert.IsTrue(graph.ContainsEdge(edge3));
Assert.IsTrue(graph.ContainsEdge(edge4));
Assert.IsTrue(graph.ContainsEdge(otherEdge1));
// Both vertices not in graph
Assert.IsFalse(graph.ContainsEdge(new EquatableEdge <int>(0, 10)));
// Source not in graph
Assert.IsFalse(graph.ContainsEdge(new EquatableEdge <int>(0, 1)));
// Target not in graph
Assert.IsFalse(graph.ContainsEdge(new EquatableEdge <int>(1, 0)));
}
public void EdgeListGraphTestAddStuff()
{
var g = new EdgeListGraph <int, IEdge <int> >();
g.AddEdge(new Edge <int>(0, 1));
Assert.AreEqual(2, g.VertexCount);
Assert.AreEqual(1, g.EdgeCount);
g.AddEdge(new Edge <int>(0, 1));
Assert.AreEqual(2, g.VertexCount);
Assert.AreEqual(2, g.EdgeCount);
g.AddEdge(new EquatableEdge <int>(0, 2));
Assert.AreEqual(3, g.VertexCount);
Assert.AreEqual(3, g.EdgeCount);
g.AddVerticesAndEdge(new Edge <int>(3, 4));
Assert.AreEqual(5, g.VertexCount);
Assert.AreEqual(4, g.EdgeCount);
g.AddEdgeRange(new List <IEdge <int> > {
new Edge <int>(4, 5)
});
Assert.AreEqual(6, g.VertexCount);
Assert.AreEqual(5, g.EdgeCount);
g.AddVerticesAndEdgeRange(new List <IEdge <int> > {
new Edge <int>(4, 5)
});
Assert.AreEqual(6, g.VertexCount);
Assert.AreEqual(6, g.EdgeCount);
}
public void EdgeListGraphTestProperty()
{
var g = new EdgeListGraph <int, IEdge <int> >();
Assert.IsTrue(g.IsDirected);
Assert.IsTrue(g.AllowParallelEdges);
Assert.IsTrue(g.IsEdgesEmpty);
Assert.IsTrue(g.IsVerticesEmpty);
Assert.AreEqual(g.VertexCount, 0);
Assert.AreEqual(g.EdgeCount, 0);
var h = new EdgeListGraph <int, IEdge <int> >(false, false);
Assert.IsFalse(h.IsDirected);
Assert.IsFalse(h.AllowParallelEdges);
h.AddVerticesAndEdge(new EquatableEdge <int>(1, 2));
Assert.IsFalse(h.IsEdgesEmpty);
Assert.IsFalse(h.IsVerticesEmpty);
Assert.AreEqual(h.VertexCount, 2);
Assert.AreEqual(h.EdgeCount, 1);
var hv = h.Vertices.ToList <int>();
Assert.AreEqual(hv[0], 1);
Assert.AreEqual(hv[1], 2);
var he = h.Edges.ToList <IEdge <int> >();
Assert.AreEqual(he[0], new EquatableEdge <int>(1, 2));
}
protected static void AddVerticesAndEdge_Throws_EdgesOnly_Test <TVertex, TEdge>(
[NotNull] EdgeListGraph <TVertex, TEdge> graph)
where TEdge : class, IEdge <TVertex>
{
// ReSharper disable once AssignNullToNotNullAttribute
Assert.Throws <ArgumentNullException>(() => graph.AddVerticesAndEdge(null));
AssertEmptyGraph(graph);
}
public void Clear()
{
int edgesRemoved = 0;
var graph = new EdgeListGraph <int, Edge <int> >();
// ReSharper disable once ParameterOnlyUsedForPreconditionCheck.Local
graph.EdgeRemoved += e =>
{
Assert.IsNotNull(e);
// ReSharper disable once AccessToModifiedClosure
++edgesRemoved;
};
AssertEmptyGraph(graph);
graph.Clear();
AssertEmptyGraph(graph);
CheckCounter(0);
graph.AddVerticesAndEdge(new Edge <int>(1, 2));
graph.AddVerticesAndEdge(new Edge <int>(2, 3));
graph.AddVerticesAndEdge(new Edge <int>(3, 1));
graph.Clear();
AssertEmptyGraph(graph);
CheckCounter(3);
#region Local function
void CheckCounter(int expectedEdgesRemoved)
{
Assert.AreEqual(expectedEdgesRemoved, edgesRemoved);
edgesRemoved = 0;
}
#endregion
}