public void TestAutomorphic()
{
int cRows = 10, cCols = 10;
Graph graph1 = new Graph();
graph1.InsertNodes(cRows * cCols);
for (int iRow = 0; iRow < cRows - 1; iRow++)
{
for (int iCol = 0; iCol < cCols - 1; iCol++)
{
int iNode = iCol * cRows + iRow;
int iNodeToCol = iNode + 1;
int iNodeToRow = iNode + cRows;
graph1.InsertEdge(iNode, iNodeToCol);
graph1.InsertEdge(iNode, iNodeToRow);
graph1.InsertEdge(iNodeToCol, iNode);
graph1.InsertEdge(iNodeToRow, iNode);
}
}
Graph graph2 = graph1.IsomorphicShuffling(new Random(102));
// Insert this and you'll wait a LONG time for this test to finish...
// Note - the above is no longer true now that we have Degree compatibility check
// graph1.InsertEdge(0, cRows * cCols - 1);
VfState vfs = new VfState(graph1, graph2, true);
Assert.IsTrue(vfs.FMatch());
}
internal Graph IsomorphicShuffling(Random rnd)
{
Graph graph = new Graph();
int[] ariShuffle = new int[NodeCount];
for (int i = 0; i < NodeCount; i++)
{
ariShuffle[i] = i;
}
Shuffle <int>(ariShuffle, rnd);
graph.InsertNodes(NodeCount);
for (int inod = 0; inod < NodeCount; inod++)
{
int inodShuffled = ariShuffle[inod];
nNode nod = _nodes[inodShuffled];
foreach (eNode end in nod._edgesFrom.Values)
{
graph.InsertEdge(ariShuffle[PosFromId(end._idFrom)], ariShuffle[PosFromId(end._idTo)]);
}
}
return(graph);
}
public void TestMatchComplex()
{
VfState vfs = VfsTest();
Assert.IsTrue(vfs.FMatch());
Graph graph2 = VfsTestGraph2();
graph2.DeleteEdge(1, 4);
graph2.InsertEdge(2, 4);
vfs = new VfState(VfsTestGraph1(), graph2);
Assert.IsFalse(vfs.FMatch());
Graph graph1 = new Graph();
graph1.InsertNodes(11);
graph2 = new Graph();
graph2.InsertNodes(11);
graph1.InsertEdge(0, 2);
graph1.InsertEdge(0, 1);
graph1.InsertEdge(2, 4);
graph1.InsertEdge(2, 5);
graph1.InsertEdge(1, 5);
graph1.InsertEdge(1, 3);
graph1.InsertEdge(4, 7);
graph1.InsertEdge(5, 7);
graph1.InsertEdge(5, 8);
graph1.InsertEdge(5, 6);
graph1.InsertEdge(3, 6);
graph1.InsertEdge(7, 10);
graph1.InsertEdge(6, 9);
graph1.InsertEdge(10, 8);
graph1.InsertEdge(8, 9);
graph2.InsertEdge(0, 1);
graph2.InsertEdge(0, 9);
graph2.InsertEdge(1, 2);
graph2.InsertEdge(1, 10);
graph2.InsertEdge(9, 10);
graph2.InsertEdge(9, 8);
graph2.InsertEdge(2, 3);
graph2.InsertEdge(10, 3);
graph2.InsertEdge(10, 5);
graph2.InsertEdge(10, 7);
graph2.InsertEdge(8, 7);
graph2.InsertEdge(3, 4);
graph2.InsertEdge(7, 6);
graph2.InsertEdge(4, 5);
graph2.InsertEdge(5, 6);
vfs = new VfState(graph1, graph2, true);
Assert.IsTrue(vfs.FMatch());
}
public void TestMatchNonConnected()
{
Graph gr1 = new Graph();
Graph gr2 = new Graph();
gr1.InsertNodes(4);
gr2.InsertNodes(4);
gr1.InsertEdge(0, 1);
gr1.InsertEdge(2, 3);
gr2.InsertEdge(2, 1);
gr2.InsertEdge(0, 3);
VfState vfs = new VfState(gr1, gr2);
Assert.IsTrue(vfs.FMatch());
}
public void TestMatchSubgraph()
{
// Note that "Subgraph" is defined as a graph derived from
// deleting nodes from another graph. Thus, the edges
// between the remaining nodes must match with matches in the
// original graph. Adding edges between nodes in a graph does
// not constitute a supergraph under this definition.
Graph gr1 = new Graph();
Graph gr2 = new Graph();
gr1.InsertNodes(4);
gr2.InsertNodes(3);
gr1.InsertEdge(0, 1);
gr1.InsertEdge(2, 0);
gr1.InsertEdge(3, 0);
gr1.InsertEdge(2, 3);
gr2.InsertEdge(0, 1);
gr2.InsertEdge(2, 0);
VfState vfs = new VfState(gr1, gr2);
Assert.IsTrue(vfs.FMatch());
gr1 = VfsTestGraph1();
gr2 = VfsTestGraph2();
vfs = new VfState(gr1, gr2);
Assert.IsTrue(vfs.FMatch());
gr1.InsertNode();
gr1.InsertEdge(6, 3);
gr1.InsertEdge(6, 5);
// Graph 2 is isomorphic to a subgraph of graph 1 (default check is for
// subgraph isomorphism).
vfs = new VfState(gr1, gr2);
Assert.IsTrue(vfs.FMatch());
// The converse is false
vfs = new VfState(gr2, gr1);
Assert.IsFalse(vfs.FMatch());
// The two graphs are subgraph ismorphic but not ismorphic
vfs = new VfState(gr1, gr2, true /* fIsomorphism */);
Assert.IsFalse(vfs.FMatch());
}
public void TestMultipleMatches()
{
Graph gr1 = new Graph();
Graph gr2 = new Graph();
VfState vfs;
gr1.InsertNodes(3);
gr2.InsertNodes(3);
gr1.InsertEdge(0, 1);
gr1.InsertEdge(1, 2);
gr1.InsertEdge(2, 0);
gr2.InsertEdge(0, 2);
gr2.InsertEdge(2, 1);
gr2.InsertEdge(1, 0);
vfs = new VfState(gr1, gr2, false, false, true);
Assert.IsTrue(vfs.FMatch());
Assert.AreEqual(3, vfs.Mappings.Count);
vfs = new VfState(gr1, gr2, true, false, true);
Assert.IsTrue(vfs.FMatch());
Assert.AreEqual(3, vfs.Mappings.Count);
gr2.InsertEdge(0, 1);
gr2.InsertEdge(1, 2);
gr2.InsertEdge(2, 0);
gr1.InsertEdge(0, 2);
gr1.InsertEdge(2, 1);
gr1.InsertEdge(1, 0);
vfs = new VfState(gr1, gr2, false, false, true);
Assert.IsTrue(vfs.FMatch());
Assert.AreEqual(6, vfs.Mappings.Count);
vfs = new VfState(gr1, gr2, true, false, true);
Assert.IsTrue(vfs.FMatch());
Assert.AreEqual(6, vfs.Mappings.Count);
}
public Graph GetGraph(int cnod)
{
int cEdgesNeeded = (int)(cnod * (cnod - 1) * _pctEdges);
int cEdgesSoFar = 0;
Set <EdgeKey> setEdges = new Set <EdgeKey>();
Graph graph = new Graph();
graph.InsertNodes(cnod);
while (cEdgesSoFar < cEdgesNeeded)
{
EdgeKey ekey = new EdgeKey(_rnd.Next(cnod), _rnd.Next(cnod));
if (setEdges.Contains(ekey) || ekey.From == ekey.To)
{
continue;
}
graph.InsertEdge(ekey.From, ekey.To);
setEdges.Add(ekey);
cEdgesSoFar++;
}
return(graph);
}
public void TestPermutationMassage()
{
Graph graph1 = new Graph();
graph1.InsertNodes(4);
graph1.InsertEdge(2, 3);
Graph graph2 = new Graph();
graph2.InsertNodes(2);
graph2.InsertEdge(1, 0);
VfState vfs = new VfState(graph1, graph2);
Assert.IsTrue(vfs.FMatch());
int[] arprm1To2 = vfs.Mapping1To2;
int[] arprm2To1 = vfs.Mapping2To1;
Assert.AreEqual(1, arprm1To2[2]);
Assert.AreEqual(0, arprm1To2[3]);
Assert.AreEqual(map_Illegal, arprm1To2[0]);
Assert.AreEqual(map_Illegal, arprm1To2[1]);
Assert.AreEqual(3, arprm2To1[0]);
Assert.AreEqual(2, arprm2To1[1]);
}