@Test
public void testRebuildStackFail1()
{
final LearnerGraph gr = buildLearnerGraph("A-a->A-b->B-c->C", "testWritePairsToXML1",mainConfiguration,converter);
final PairOfPaths pair1 = new PairOfPaths(gr,new PairScore(gr.findVertex(VertexID.parseID("A")), gr.findVertex(VertexID.parseID("C")),1,2));
final Stack<PairScore> stack=new Stack<PairScore>();
Helper.checkForCorrectException(new whatToRun() { public @Override void run() {
pair1.rebuildStack(gr, stack);
}},IllegalArgumentException.class,"pair not found");
}