protected static void RemoveEdge_EquatableEdge_Test(
[NotNull] IMutableVertexAndEdgeSet <int, EquatableEdge <int> > graph)
{
int verticesRemoved = 0;
int edgesRemoved = 0;
graph.VertexRemoved += v =>
{
Assert.IsNotNull(v);
++verticesRemoved;
};
graph.EdgeRemoved += e =>
{
Assert.IsNotNull(e);
// ReSharper disable once AccessToModifiedClosure
++edgesRemoved;
};
var edge12 = new EquatableEdge <int>(1, 2);
var edge13 = new EquatableEdge <int>(1, 3);
var edge13Bis = new EquatableEdge <int>(1, 3);
var edge14 = new EquatableEdge <int>(1, 4);
var edge24 = new EquatableEdge <int>(2, 4);
var edge31 = new EquatableEdge <int>(3, 1);
var edge33 = new EquatableEdge <int>(3, 3);
var edgeNotInGraph = new EquatableEdge <int>(3, 4);
var edgeWithVertexNotInGraph1 = new EquatableEdge <int>(2, 10);
var edgeWithVertexNotInGraph2 = new EquatableEdge <int>(10, 2);
var edgeWithVerticesNotInGraph = new EquatableEdge <int>(10, 11);
var edgeEquatable = new EquatableEdge <int>(1, 2);
graph.AddVerticesAndEdgeRange(new[] { edge12, edge13, edge13Bis, edge14, edge24, edge31, edge33 });
Assert.IsFalse(graph.RemoveEdge(edgeNotInGraph));
CheckCounters(0);
Assert.IsFalse(graph.RemoveEdge(edgeWithVertexNotInGraph1));
CheckCounters(0);
Assert.IsFalse(graph.RemoveEdge(edgeWithVertexNotInGraph2));
CheckCounters(0);
Assert.IsFalse(graph.RemoveEdge(edgeWithVerticesNotInGraph));
CheckCounters(0);
Assert.IsTrue(graph.RemoveEdge(edgeEquatable));
CheckCounters(1);
AssertHasVertices(graph, new[] { 1, 2, 3, 4 });
AssertHasEdges(graph, new[] { edge13, edge13Bis, edge14, edge24, edge31, edge33 });
Assert.IsTrue(graph.RemoveEdge(edge13Bis));
CheckCounters(1);
AssertHasVertices(graph, new[] { 1, 2, 3, 4 });
AssertHasEdges(graph, new[] { edge13, edge14, edge24, edge31, edge33 });
Assert.IsTrue(graph.RemoveEdge(edge31));
CheckCounters(1);
AssertHasVertices(graph, new[] { 1, 2, 3, 4 });
AssertHasEdges(graph, new[] { edge13, edge14, edge24, edge33 });
Assert.IsTrue(graph.RemoveEdge(edge13));
Assert.IsTrue(graph.RemoveEdge(edge14));
Assert.IsTrue(graph.RemoveEdge(edge24));
Assert.IsTrue(graph.RemoveEdge(edge33));
CheckCounters(4);
AssertHasVertices(graph, new[] { 1, 2, 3, 4 });
AssertNoEdge(graph);
#region Local function
void CheckCounters(int expectedRemovedEdges)
{
Assert.AreEqual(0, verticesRemoved);
Assert.AreEqual(expectedRemovedEdges, edgesRemoved);
edgesRemoved = 0;
}
#endregion
}