NonLiteral crossing1 = new BNode();
TripleCollection tc1 = generateCircle(2,crossing1);
tc1.addAll(generateCircle(3,crossing1));
NonLiteral crossing2 = new BNode();
TripleCollection tc2 = generateCircle(2,crossing2);
tc2.addAll(generateCircle(3,crossing2));
Assert.assertEquals(5, tc1.size());
final Map<BNode, BNode> mapping = GraphMatcher.getValidMapping(tc1, tc2);
Assert.assertNotNull(mapping);
//a circle of 2 and one of 3 with one common node
Assert.assertEquals(4, mapping.size());