public void GetEdge_Throws()
{
var graph = new AdjacencyGraph <int, Edge <int> >();
var graph2 = new AdjacencyGraph <TestVertex, Edge <TestVertex> >();
var random = new Random();
// ReSharper disable ReturnValueOfPureMethodIsNotUsed
// ReSharper disable AssignNullToNotNullAttribute
Assert.Throws <ArgumentNullException>(() => RandomGraphFactory.GetEdge <int, Edge <int> >(null, random));
Assert.Throws <ArgumentNullException>(() => RandomGraphFactory.GetEdge(graph2, null));
Assert.Throws <ArgumentNullException>(() => RandomGraphFactory.GetEdge <int, Edge <int> >(null, null));
Assert.Throws <ArgumentNullException>(() => RandomGraphFactory.GetEdge <int, Edge <int> >(null, 1, random));
Assert.Throws <ArgumentNullException>(() => RandomGraphFactory.GetEdge <int, Edge <int> >(Enumerable.Empty <Edge <int> >(), 1, null));
Assert.Throws <ArgumentNullException>(() => RandomGraphFactory.GetEdge <int, Edge <int> >(null, 1, null));
// ReSharper restore AssignNullToNotNullAttribute
Assert.Throws <ArgumentOutOfRangeException>(() => RandomGraphFactory.GetVertex(graph, random));
Assert.Throws <ArgumentOutOfRangeException>(() => RandomGraphFactory.GetEdge <int, Edge <int> >(Enumerable.Empty <Edge <int> >(), -1, random));
Assert.Throws <ArgumentOutOfRangeException>(() => RandomGraphFactory.GetEdge <int, Edge <int> >(Enumerable.Empty <Edge <int> >(), 0, random));
Assert.Throws <InvalidOperationException>(() => RandomGraphFactory.GetEdge <int, Edge <int> >(Enumerable.Empty <Edge <int> >(), 1, random));
Assert.Throws <InvalidOperationException>(
() => RandomGraphFactory.GetEdge <int, Edge <int> >(
new[] { new Edge <int>(1, 2), new Edge <int>(1, 3) },
10,
new Random(123456)));
// ReSharper restore ReturnValueOfPureMethodIsNotUsed
}
public void GetEdge()
{
var graph = new AdjacencyGraph <int, Edge <int> >();
var edge12 = new Edge <int>(1, 2);
var edge13 = new Edge <int>(1, 3);
var edge23 = new Edge <int>(2, 3);
var edge24 = new Edge <int>(2, 4);
var edge35 = new Edge <int>(3, 5);
graph.AddVerticesAndEdgeRange(new[]
{
edge12, edge13, edge23, edge24, edge35
});
Edge <int> edge = RandomGraphFactory.GetEdge(graph, new Random(123456));
Assert.AreSame(edge13, edge);
edge = RandomGraphFactory.GetEdge(graph, new Random(456789));
Assert.AreSame(edge35, edge);
edge = RandomGraphFactory.GetEdge <int, Edge <int> >(graph.Edges, graph.VertexCount, new Random(123456));
Assert.AreSame(edge13, edge);
edge = RandomGraphFactory.GetEdge <int, Edge <int> >(graph.Edges, graph.VertexCount, new Random(456789));
Assert.AreSame(edge35, edge);
edge = RandomGraphFactory.GetEdge <int, Edge <int> >(graph.Edges, 3, new Random(123));
Assert.AreSame(edge23, edge);
}