@Test
  public void testSimpleDelete2() {
    graph = createGraph();
    NodeAccess na = graph.getNodeAccess();
    assertEquals(-1, getIdOf(graph, 12));
    na.setNode(9, 9, 1);
    assertEquals(-1, getIdOf(graph, 12));

    na.setNode(11, 11, 1);
    na.setNode(12, 12, 1);

    // mini subnetwork which gets completely removed:
    graph.edge(5, 10, 510, true);
    graph.markNodeRemoved(5);
    graph.markNodeRemoved(10);

    PointList pl = new PointList();
    pl.add(1, 2, Double.NaN);
    pl.add(1, 3, Double.NaN);
    graph.edge(9, 11, 911, true).setWayGeometry(pl);
    graph.edge(9, 12, 912, true).setWayGeometry(pl);

    assertEquals(13, graph.getNodes());
    assertEquals(Arrays.<String>asList(), GHUtility.getProblems(graph));

    // perform deletion
    graph.optimize();

    assertEquals(11, graph.getNodes());
    assertEquals(Arrays.<String>asList(), GHUtility.getProblems(graph));

    int id11 = getIdOf(graph, 11); // is now 10
    int id12 = getIdOf(graph, 12); // is now 5
    int id9 = getIdOf(graph, 9); // is now 9
    assertEquals(
        GHUtility.asSet(id12, id11), GHUtility.getNeighbors(carAllExplorer.setBaseNode(id9)));
    assertEquals(GHUtility.asSet(id9), GHUtility.getNeighbors(carAllExplorer.setBaseNode(id11)));
    assertEquals(GHUtility.asSet(id9), GHUtility.getNeighbors(carAllExplorer.setBaseNode(id12)));

    EdgeIterator iter = carAllExplorer.setBaseNode(id9);
    assertTrue(iter.next());
    assertEquals(id12, iter.getAdjNode());
    assertEquals(2, iter.fetchWayGeometry(0).getLongitude(0), 1e-7);

    assertTrue(iter.next());
    assertEquals(id11, iter.getAdjNode());
    assertEquals(2, iter.fetchWayGeometry(0).getLongitude(0), 1e-7);
  }
 public static void assertPList(PointList expected, PointList list) {
   assertEquals("size of point lists is not equal", expected.getSize(), list.getSize());
   for (int i = 0; i < expected.getSize(); i++) {
     assertEquals(expected.getLatitude(i), list.getLatitude(i), 1e-4);
     assertEquals(expected.getLongitude(i), list.getLongitude(i), 1e-4);
   }
 }