protected static void TryGetEdges_Throws_Test <TEdge>(
[NotNull] IIncidenceGraph <TestVertex, TEdge> graph)
where TEdge : IEdge <TestVertex>
{
// ReSharper disable AssignNullToNotNullAttribute
Assert.Throws <ArgumentNullException>(() => graph.TryGetEdges(null, new TestVertex("v2"), out _));
Assert.Throws <ArgumentNullException>(() => graph.TryGetEdges(new TestVertex("v1"), null, out _));
Assert.Throws <ArgumentNullException>(() => graph.TryGetEdges(null, null, out _));
// ReSharper restore AssignNullToNotNullAttribute
}
protected static void TryGetEdges_Test(
[NotNull] GraphData <int, Edge <int> > data,
[NotNull] IIncidenceGraph <int, Edge <int> > graph)
{
data.CheckCalls(0);
data.ShouldReturnValue = false;
Assert.IsFalse(graph.TryGetEdges(0, 1, out _));
data.CheckCalls(1);
data.ShouldReturnValue = true;
Assert.IsTrue(graph.TryGetEdges(1, 2, out IEnumerable <Edge <int> > edges));
CollectionAssert.IsEmpty(edges);
data.CheckCalls(1);
data.ShouldReturnEdges = new[] { new Edge <int>(1, 2), new Edge <int>(1, 2) };
Assert.IsTrue(graph.TryGetEdges(1, 2, out edges));
CollectionAssert.AreEqual(data.ShouldReturnEdges, edges);
data.CheckCalls(1);
}
protected static void TryGetEdges_Test(
[NotNull] IIncidenceGraph <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);
addVerticesAndEdgeRange(new[] { edge1, edge2, edge3, edge4, edge5, edge6 });
Assert.IsFalse(graph.TryGetEdges(0, 10, out _));
Assert.IsFalse(graph.TryGetEdges(0, 1, out _));
Assert.IsTrue(graph.TryGetEdges(2, 2, out IEnumerable <Edge <int> > gotEdges));
CollectionAssert.AreEqual(new[] { edge4 }, gotEdges);
Assert.IsTrue(graph.TryGetEdges(2, 4, out gotEdges));
CollectionAssert.AreEqual(new[] { edge5 }, gotEdges);
Assert.IsTrue(graph.TryGetEdges(1, 2, out gotEdges));
CollectionAssert.AreEqual(new[] { edge1, edge2 }, gotEdges);
Assert.IsTrue(graph.TryGetEdges(2, 1, out gotEdges));
CollectionAssert.IsEmpty(gotEdges);
}
protected static void TryGetEdges_ImmutableGraph_ReversedTest(
[NotNull] IMutableVertexAndEdgeSet <int, Edge <int> > wrappedGraph,
[NotNull, InstantHandle] Func <IIncidenceGraph <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>(2, 2);
var edge5 = new Edge <int>(2, 4);
var edge6 = new Edge <int>(3, 1);
wrappedGraph.AddVerticesAndEdgeRange(new[] { edge1, edge2, edge3, edge4, edge5, edge6 });
IIncidenceGraph <int, SReversedEdge <int, Edge <int> > > graph = createGraph();
Assert.IsFalse(graph.TryGetEdges(0, 10, out _));
Assert.IsFalse(graph.TryGetEdges(0, 1, out _));
Assert.IsTrue(graph.TryGetEdges(2, 2, out IEnumerable <SReversedEdge <int, Edge <int> > > gotEdges));
AssertSameReversedEdges(new[] { edge4 }, gotEdges);
Assert.IsTrue(graph.TryGetEdges(4, 2, out gotEdges));
AssertSameReversedEdges(new[] { edge5 }, gotEdges);
Assert.IsTrue(graph.TryGetEdges(2, 1, out gotEdges));
AssertSameReversedEdges(new[] { edge1, edge2 }, gotEdges);
Assert.IsTrue(graph.TryGetEdges(1, 2, out gotEdges));
CollectionAssert.IsEmpty(gotEdges);
}
protected static void TryGetEdges_ImmutableGraph_Test(
IMutableVertexAndEdgeSet <int, Edge <int> > wrappedGraph,
Func <IIncidenceGraph <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);
wrappedGraph.AddVerticesAndEdgeRange(new[] { edge1, edge2, edge3, edge4, edge5, edge6 });
IIncidenceGraph <int, Edge <int> > graph = createGraph();
Assert.IsFalse(graph.TryGetEdges(0, 10, out _));
Assert.IsFalse(graph.TryGetEdges(0, 1, out _));
Assert.IsTrue(graph.TryGetEdges(2, 2, out IEnumerable <Edge <int> > gotEdges));
CollectionAssert.AreEqual(new[] { edge4 }, gotEdges);
Assert.IsTrue(graph.TryGetEdges(2, 4, out gotEdges));
CollectionAssert.AreEqual(new[] { edge5 }, gotEdges);
Assert.IsTrue(graph.TryGetEdges(1, 2, out gotEdges));
CollectionAssert.AreEqual(new[] { edge1, edge2 }, gotEdges);
Assert.IsTrue(graph.TryGetEdges(2, 1, out gotEdges));
CollectionAssert.IsEmpty(gotEdges);
}