added doctests for _subgraph_by_adding()

sagemath · Nov 5, 2024 · abb1b56 · abb1b56
1 parent 6a68edf
commit abb1b56
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/sage/graphs/matching_covered_graph.py b/src/sage/graphs/matching_covered_graph.py
@@ -812,6 +812,14 @@ def _subgraph_by_adding(self, vertices=None, edges=None, edge_property=None, imm
             True
             sage: H.is_immutable()
             True
+            sage: C = graphs.CubeplexGraph()
+            sage: D = MatchingCoveredGraph(C)
+            sage: I = D._subgraph_by_adding(immutable=True)
+            sage: (I == D) and (I.is_immutable())
+            True
+            sage: J = D._subgraph_by_adding(vertices=D.vertices(), immutable=True)
+            sage: (J == D) and (J.is_immutable())
+            True
 
         An error is thrown if the subgraph is not matching covered::