public void testNetworkLinker() {
int numVerticesBefore = graph.getVertices().size();
NetworkLinker nl = new NetworkLinker(graph);
nl.createLinkage();
int numVerticesAfter = graph.getVertices().size();
assertEquals(4, numVerticesAfter - numVerticesBefore);
Collection<Edge> outgoing = graph.getOutgoing(station1);
assertTrue(outgoing.size() == 1);
DirectEdge edge = (DirectEdge) outgoing.iterator().next();
Vertex midpoint = edge.getToVertex();
assertTrue(Math.abs(midpoint.getCoordinate().y - 40.01) < 0.00000001);
outgoing = graph.getOutgoing(station2);
assertTrue(outgoing.size() == 1);
edge = (DirectEdge) outgoing.iterator().next();
Vertex station2point = edge.getToVertex();
assertTrue(Math.abs(station2point.getCoordinate().x - -74.002) < 0.00000001);
}
public void testHalfEdges() {
// the shortest half-edge from the start vertex takes you down, but the shortest total path
// is up and over
TraverseOptions options = new TraverseOptions();
HashSet<Edge> turns = new HashSet<Edge>(graph.getOutgoing(left));
turns.addAll(graph.getOutgoing(leftBack));
StreetLocation start =
StreetLocation.createStreetLocation(
"start",
"start",
cast(turns, StreetEdge.class),
new LinearLocation(0, 0.4).getCoordinate(left.getGeometry()));
HashSet<Edge> endTurns = new HashSet<Edge>(graph.getOutgoing(right));
endTurns.addAll(graph.getOutgoing(rightBack));
StreetLocation end =
StreetLocation.createStreetLocation(
"end",
"end",
cast(endTurns, StreetEdge.class),
new LinearLocation(0, 0.8).getCoordinate(right.getGeometry()));
assertTrue(start.getX() < end.getX());
assertTrue(start.getY() < end.getY());
List<DirectEdge> extra = end.getExtra();
assertEquals(12, extra.size());
GregorianCalendar startTime = new GregorianCalendar(2009, 11, 1, 12, 34, 25);
ShortestPathTree spt1 =
AStar.getShortestPathTree(graph, brOut, end, TestUtils.toSeconds(startTime), options);
GraphPath pathBr = spt1.getPath(end, false);
assertNotNull("There must be a path from br to end", pathBr);
ShortestPathTree spt2 =
AStar.getShortestPathTree(graph, trOut, end, TestUtils.toSeconds(startTime), options);
GraphPath pathTr = spt2.getPath(end, false);
assertNotNull("There must be a path from tr to end", pathTr);
assertTrue(
"path from bottom to end must be longer than path from top to end",
pathBr.getWeight() > pathTr.getWeight());
ShortestPathTree spt =
AStar.getShortestPathTree(graph, start, end, TestUtils.toSeconds(startTime), options);
GraphPath path = spt.getPath(end, false);
assertNotNull("There must be a path from start to end", path);
// the bottom is not part of the shortest path
for (State s : path.states) {
assertNotSame(s.getVertex(), graph.getVertex("bottom"));
assertNotSame(s.getVertex(), graph.getVertex("bottomBack"));
}
startTime = new GregorianCalendar(2009, 11, 1, 12, 34, 25);
options.setArriveBy(true);
spt = AStar.getShortestPathTree(graph, start, end, TestUtils.toSeconds(startTime), options);
path = spt.getPath(start, false);
assertNotNull("There must be a path from start to end (looking back)", path);
// the bottom edge is not part of the shortest path
for (State s : path.states) {
assertNotSame(s.getVertex(), graph.getVertex("bottom"));
assertNotSame(s.getVertex(), graph.getVertex("bottomBack"));
}
/* Now, the right edge is not bikeable. But the user can walk their bike. So here are some tests
* that prove (a) that walking bikes works, but that (b) it is not preferred to riding a tiny bit longer.
*/
options = new TraverseOptions(new TraverseModeSet(TraverseMode.BICYCLE));
start =
StreetLocation.createStreetLocation(
"start1",
"start1",
cast(turns, StreetEdge.class),
new LinearLocation(0, 0.95).getCoordinate(top.getGeometry()));
end =
StreetLocation.createStreetLocation(
"end1",
"end1",
cast(turns, StreetEdge.class),
new LinearLocation(0, 0.95).getCoordinate(bottom.getGeometry()));
spt = AStar.getShortestPathTree(graph, start, end, TestUtils.toSeconds(startTime), options);
path = spt.getPath(start, false);
assertNotNull("There must be a path from top to bottom along the right", path);
// the left edge is not part of the shortest path (even though the bike must be walked along the
// right)
for (State s : path.states) {
assertNotSame(s.getVertex(), graph.getVertex("left"));
assertNotSame(s.getVertex(), graph.getVertex("leftBack"));
}
start =
StreetLocation.createStreetLocation(
"start2",
"start2",
cast(turns, StreetEdge.class),
new LinearLocation(0, 0.55).getCoordinate(top.getGeometry()));
end =
StreetLocation.createStreetLocation(
"end2",
"end2",
cast(turns, StreetEdge.class),
new LinearLocation(0, 0.55).getCoordinate(bottom.getGeometry()));
spt = AStar.getShortestPathTree(graph, start, end, TestUtils.toSeconds(startTime), options);
path = spt.getPath(start, false);
assertNotNull("There must be a path from top to bottom", path);
// the right edge is not part of the shortest path, e
for (State s : path.states) {
assertNotSame(s.getVertex(), graph.getVertex("right"));
assertNotSame(s.getVertex(), graph.getVertex("rightBack"));
}
}
