protected static void RemoveEdgeIf_EdgesOnly_Test(
[NotNull] EdgeListGraph <int, Edge <int> > graph)
{
int edgesRemoved = 0;
// ReSharper disable once ParameterOnlyUsedForPreconditionCheck.Local
graph.EdgeRemoved += e =>
{
Assert.IsNotNull(e);
// ReSharper disable once AccessToModifiedClosure
++edgesRemoved;
};
var edge12 = new Edge <int>(1, 2);
var edge13 = new Edge <int>(1, 3);
var edge13Bis = new Edge <int>(1, 3);
var edge14 = new Edge <int>(1, 4);
var edge24 = new Edge <int>(2, 4);
var edge31 = new Edge <int>(3, 1);
var edge33 = new Edge <int>(3, 3);
graph.AddEdgeRange(new[] { edge12, edge13, edge13Bis, edge14, edge24, edge31, edge33 });
Assert.AreEqual(0, graph.RemoveEdgeIf(edge => edge.Target == 5));
CheckCounter(0);
Assert.AreEqual(2, graph.RemoveEdgeIf(edge => edge.Source == 3));
CheckCounter(2);
AssertHasVertices(graph, new[] { 1, 2, 3, 4 });
AssertHasEdges(graph, new[] { edge12, edge13, edge13Bis, edge14, edge24 });
Assert.AreEqual(5, graph.RemoveEdgeIf(_ => true));
CheckCounter(5);
AssertEmptyGraph(graph); // Vertices removed in the same time as edges
#region Local function
void CheckCounter(int expectedRemovedEdges)
{
Assert.AreEqual(expectedRemovedEdges, edgesRemoved);
edgesRemoved = 0;
}
#endregion
}