Dispatch more algorithms and improve auto-test capabilities

1 files changed, 2 insertions, 0 deletions

diff --git a/networkx/algorithms/dag.py b/networkx/algorithms/dag.py
index 826b87ff..f7692d1f 100644
--- a/networkx/algorithms/dag.py
+++ b/networkx/algorithms/dag.py
@@ -36,6 +36,7 @@ __all__ = [
 chaini = chain.from_iterable
 
 
+@nx.dispatch("descendants")
 def descendants(G, source):
     """Returns all nodes reachable from `source` in `G`.
 
@@ -72,6 +73,7 @@ def descendants(G, source):
     return {child for parent, child in nx.bfs_edges(G, source)}
 
 
+@nx.dispatch("ancestors")
 def ancestors(G, source):
     """Returns all nodes having a path to `source` in `G`.