/** HG: measures time needed to check a pair of huge random graphs */
@Test
public void testHugeGraph() {
int n = 700;
long time = System.currentTimeMillis();
DirectedGraph<Integer, DefaultEdge>
g1 = SubgraphIsomorphismTestUtils.randomGraph(n, n * n / 50, 12345),
g2 = SubgraphIsomorphismTestUtils.randomSubgraph(g1, n / 2, 54321);
VF2SubgraphIsomorphismInspector<Integer, DefaultEdge> vf2 =
new VF2SubgraphIsomorphismInspector<>(g1, g2);
assertEquals(true, vf2.isomorphismExists());
SubgraphIsomorphismTestUtils.showLog(
"|V1| = "
+ g1.vertexSet().size()
+ ", |E1| = "
+ g1.edgeSet().size()
+ ", |V2| = "
+ g2.vertexSet().size()
+ ", |E2| = "
+ g2.edgeSet().size()
+ " - "
+ (System.currentTimeMillis() - time)
+ "ms");
}
/** RG-1: Tests if a all matchings are correct (on some random graphs). */
@Test
public void testRandomGraphs() {
Random rnd = new Random();
rnd.setSeed(54321);
for (int i = 1; i < 50; i++) {
int vertexCount = 2 + rnd.nextInt(i),
edgeCount = vertexCount + rnd.nextInt(vertexCount * (vertexCount - 1)) / 2,
subVertexCount = 1 + rnd.nextInt(vertexCount);
DirectedGraph<Integer, DefaultEdge>
g1 = SubgraphIsomorphismTestUtils.randomGraph(vertexCount, edgeCount, i),
g2 = SubgraphIsomorphismTestUtils.randomSubgraph(g1, subVertexCount, i);
VF2SubgraphIsomorphismInspector<Integer, DefaultEdge> vf2 =
new VF2SubgraphIsomorphismInspector<>(g1, g2);
SubgraphIsomorphismTestUtils.showLog(i + ": " + vertexCount + "v, " + edgeCount + "e ");
for (Iterator<GraphMapping<Integer, DefaultEdge>> mappings = vf2.getMappings();
mappings.hasNext(); ) {
assertEquals(true, SubgraphIsomorphismTestUtils.isCorrectMatching(mappings.next(), g1, g2));
SubgraphIsomorphismTestUtils.showLog(".");
}
SubgraphIsomorphismTestUtils.showLog("\n");
}
}
/** RG-2: Tests if all matchings are correct and if every matching is found (on random graphs). */
@Test
public void testRandomGraphsExhaustive() {
Random rnd = new Random();
rnd.setSeed(12345);
for (int i = 1; i < 100; i++) {
int vertexCount = 3 + rnd.nextInt(5),
edgeCount = rnd.nextInt(vertexCount * (vertexCount - 1)),
subVertexCount = 2 + rnd.nextInt(vertexCount),
subEdgeCount = rnd.nextInt(subVertexCount * (subVertexCount - 1));
DirectedGraph<Integer, DefaultEdge>
g1 = SubgraphIsomorphismTestUtils.randomGraph(vertexCount, edgeCount, i),
g2 = SubgraphIsomorphismTestUtils.randomGraph(subVertexCount, subEdgeCount, i);
VF2SubgraphIsomorphismInspector<Integer, DefaultEdge> vf2 =
new VF2SubgraphIsomorphismInspector<>(g1, g2);
SubgraphIsomorphismTestUtils.showLog(i + ": " + vertexCount + "v, " + edgeCount + "e ....\n");
assertEquals(true, SubgraphIsomorphismTestUtils.containsAllMatchings(vf2, g1, g2));
}
}
@Test
public void testExhaustive() {
/* DET-1:
*
* 0 3
* | /| 0 2
* g1 = | 2 | g2 = |/
* |/ | 1
* 1 4
*/
SimpleGraph<Integer, DefaultEdge> g1 = new SimpleGraph<>(DefaultEdge.class),
g2 = new SimpleGraph<>(DefaultEdge.class);
g1.addVertex(0);
g1.addVertex(1);
g1.addVertex(2);
g1.addVertex(3);
g1.addVertex(4);
g2.addVertex(0);
g2.addVertex(1);
g2.addVertex(2);
g1.addEdge(0, 1);
g1.addEdge(1, 2);
g1.addEdge(2, 3);
g1.addEdge(3, 4);
g2.addEdge(0, 1);
g2.addEdge(1, 2);
VF2SubgraphIsomorphismInspector<Integer, DefaultEdge> vf2 =
new VF2SubgraphIsomorphismInspector<>(g1, g2);
assertEquals(true, SubgraphIsomorphismTestUtils.containsAllMatchings(vf2, g1, g2));
/* DET-2:
*
* g3 = ... g4 = ...
*
*/
DirectedGraph<Integer, DefaultEdge> g3 = new DefaultDirectedGraph<>(DefaultEdge.class),
g4 = new DefaultDirectedGraph<>(DefaultEdge.class);
g3.addVertex(0);
g3.addVertex(1);
g3.addVertex(2);
g3.addVertex(3);
g3.addVertex(4);
g3.addVertex(5);
g4.addVertex(0);
g4.addVertex(1);
g4.addVertex(2);
g4.addVertex(3);
g3.addEdge(0, 1);
g3.addEdge(0, 5);
g3.addEdge(1, 4);
g3.addEdge(2, 1);
g3.addEdge(2, 4);
g3.addEdge(3, 1);
g3.addEdge(4, 0);
g3.addEdge(5, 2);
g3.addEdge(5, 4);
g4.addEdge(0, 3);
g4.addEdge(1, 2);
g4.addEdge(1, 3);
g4.addEdge(2, 3);
g4.addEdge(2, 0);
VF2SubgraphIsomorphismInspector<Integer, DefaultEdge> vf3 =
new VF2SubgraphIsomorphismInspector<>(g3, g4);
assertEquals(true, SubgraphIsomorphismTestUtils.containsAllMatchings(vf3, g3, g4));
/* DET-3:
*
* 1----0 0---2
* | | /
* g5 = | g6 = | /
* | |/
* 2----3 1
*/
SimpleGraph<Integer, DefaultEdge> g5 = new SimpleGraph<>(DefaultEdge.class),
g6 = new SimpleGraph<>(DefaultEdge.class);
g5.addVertex(0);
g5.addVertex(1);
g5.addVertex(2);
g5.addVertex(3);
g6.addVertex(0);
g6.addVertex(1);
g6.addVertex(2);
g5.addEdge(0, 1);
g5.addEdge(1, 2);
g5.addEdge(2, 3);
g6.addEdge(0, 1);
g6.addEdge(1, 2);
g6.addEdge(2, 0);
VF2SubgraphIsomorphismInspector<Integer, DefaultEdge> vf4 =
new VF2SubgraphIsomorphismInspector<>(g5, g6);
assertEquals(true, SubgraphIsomorphismTestUtils.containsAllMatchings(vf4, g5, g6));
}