protected static void TryGetInEdges_Test(
[NotNull] IBidirectionalIncidenceGraph <int, Edge <int> > graph,
[NotNull, InstantHandle] Action <IEnumerable <Edge <int> > > addVerticesAndEdgeRange)
{
var edge1 = new Edge <int>(1, 2);
var edge2 = new Edge <int>(1, 2);
var edge3 = new Edge <int>(1, 3);
var edge4 = new Edge <int>(2, 2);
var edge5 = new Edge <int>(2, 4);
var edge6 = new Edge <int>(3, 1);
var edge7 = new Edge <int>(5, 3);
addVerticesAndEdgeRange(new[] { edge1, edge2, edge3, edge4, edge5, edge6, edge7 });
Assert.IsFalse(graph.TryGetInEdges(0, out _));
Assert.IsTrue(graph.TryGetInEdges(5, out IEnumerable <Edge <int> > gotEdges));
CollectionAssert.IsEmpty(gotEdges);
Assert.IsTrue(graph.TryGetInEdges(4, out gotEdges));
CollectionAssert.AreEqual(new[] { edge5 }, gotEdges);
Assert.IsTrue(graph.TryGetInEdges(2, out gotEdges));
CollectionAssert.AreEqual(new[] { edge1, edge2, edge4 }, gotEdges);
}
protected static void TryGetInEdges_ImmutableGraph_ReversedTest(
[NotNull] IMutableVertexAndEdgeSet <int, Edge <int> > wrappedGraph,
[NotNull, InstantHandle] Func <IBidirectionalIncidenceGraph <int, SReversedEdge <int, Edge <int> > > > createGraph)
{
var edge1 = new Edge <int>(1, 2);
var edge2 = new Edge <int>(1, 2);
var edge3 = new Edge <int>(1, 3);
var edge4 = new Edge <int>(1, 1);
var edge5 = new Edge <int>(2, 4);
var edge6 = new Edge <int>(3, 1);
var edge7 = new Edge <int>(4, 5);
wrappedGraph.AddVerticesAndEdgeRange(new[] { edge1, edge2, edge3, edge4, edge5, edge6, edge7 });
IBidirectionalIncidenceGraph <int, SReversedEdge <int, Edge <int> > > graph = createGraph();
Assert.IsFalse(graph.TryGetInEdges(0, out _));
Assert.IsTrue(graph.TryGetInEdges(5, out IEnumerable <SReversedEdge <int, Edge <int> > > gotEdges));
CollectionAssert.IsEmpty(gotEdges);
Assert.IsTrue(graph.TryGetInEdges(4, out gotEdges));
AssertSameReversedEdges(new[] { edge7 }, gotEdges);
Assert.IsTrue(graph.TryGetInEdges(1, out gotEdges));
AssertSameReversedEdges(new[] { edge1, edge2, edge3, edge4 }, gotEdges);
}
protected static void TryGetInEdges_ImmutableGraph_Test(
IMutableVertexAndEdgeSet <int, Edge <int> > wrappedGraph,
Func <IBidirectionalIncidenceGraph <int, Edge <int> > > createGraph)
{
var edge1 = new Edge <int>(1, 2);
var edge2 = new Edge <int>(1, 2);
var edge3 = new Edge <int>(1, 3);
var edge4 = new Edge <int>(2, 2);
var edge5 = new Edge <int>(2, 4);
var edge6 = new Edge <int>(3, 1);
var edge7 = new Edge <int>(5, 3);
wrappedGraph.AddVerticesAndEdgeRange(new[] { edge1, edge2, edge3, edge4, edge5, edge6, edge7 });
IBidirectionalIncidenceGraph <int, Edge <int> > graph = createGraph();
Assert.IsFalse(graph.TryGetInEdges(0, out _));
Assert.IsTrue(graph.TryGetInEdges(5, out IEnumerable <Edge <int> > gotEdges));
CollectionAssert.IsEmpty(gotEdges);
Assert.IsTrue(graph.TryGetInEdges(4, out gotEdges));
CollectionAssert.AreEqual(new[] { edge5 }, gotEdges);
Assert.IsTrue(graph.TryGetInEdges(2, out gotEdges));
CollectionAssert.AreEqual(new[] { edge1, edge2, edge4 }, gotEdges);
}
protected static void TryGetInEdges_Throws_Test <TVertex, TEdge>(
[NotNull] IBidirectionalIncidenceGraph <TVertex, TEdge> graph)
where TVertex : class
where TEdge : IEdge <TVertex>
{
// ReSharper disable once AssignNullToNotNullAttribute
Assert.Throws <ArgumentNullException>(() => graph.TryGetInEdges(null, out _));
}
protected static void TryGetInEdges_Test(
[NotNull] GraphData <int, Edge <int> > data,
[NotNull] IBidirectionalIncidenceGraph <int, Edge <int> > graph)
{
data.CheckCalls(0);
data.ShouldReturnValue = false;
Assert.IsFalse(graph.TryGetInEdges(1, out _));
data.CheckCalls(1);
data.ShouldReturnValue = true;
Assert.IsTrue(graph.TryGetInEdges(1, out IEnumerable <Edge <int> > edges));
CollectionAssert.IsEmpty(edges);
data.CheckCalls(1);
data.ShouldReturnEdges = new[] { new Edge <int>(4, 1), new Edge <int>(2, 1) };
Assert.IsTrue(graph.TryGetInEdges(1, out edges));
CollectionAssert.AreEqual(data.ShouldReturnEdges, edges);
data.CheckCalls(1);
}