def setarc(_resp, arc, origin_id, destination_id):
arc_cls = all_arcs.get(arc)
arc_count = Arc.query(Arc.origin == to_node_key(origin_id), Arc.destination == to_node_key(destination_id)).count()
if arc_count > 0:
_resp.write("Arc already exists")
else:
arc_cls(origin=to_node_key(origin_id), destination=to_node_key(destination_id)).put()
_resp.write("Arc Created")
def assert_arc_creation(self, cmd, origin, destination):
created_arc = cmd()
self.assertEqual(to_node_key(origin), to_node_key(cmd.origin))
self.assertEqual(to_node_key(destination), to_node_key(cmd.destination))
arc = Arc.query().order(-Arc.creation).get()
self.assertEqual(arc, created_arc)
self.assertEqual(to_node_key(origin), to_node_key(arc.origin))
self.assertEqual(to_node_key(destination), to_node_key(arc.destination))
def test_neighbors(self):
root = Node(id=1)
neighbors = [Node(id=i) for i in xrange(2, 5)]
arcs = [Arc(origin=root.key, destination=n.key) for n in neighbors]
ndb.put_multi(arcs + neighbors + [root])
searched_arcs = Arc.find_destinations(root).fetch(10)
searched_neighbors_keys = [a.destination for a in searched_arcs]
neighbors_keys = [n.key for n in neighbors]
self.assertListEqual(neighbors_keys, searched_neighbors_keys)
def test_content_graph(self):
video = Video()
video.put()
text = Text()
text.put()
game = Game()
game.put()
arc = Arc()
arc.origin = video.key
arc.destination = text.key
arc.put()
arc = Arc()
arc.origin = video.key
arc.destination = game.key
arc.put()
nexts = Arc.find_destinations(video.key).fetch(100)
self.assertEquals(text, nexts[0].destination.get())
self.assertEquals(game, nexts[1].destination.get())