trac #15681: New doctest for name() on immutable graphs

sagemath · Jan 16, 2014 · 7e9d208 · 7e9d208
1 parent 5620ec5
commit 7e9d208
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/src/sage/graphs/generic_graph.py b/src/sage/graphs/generic_graph.py
@@ -2304,6 +2304,17 @@ def name(self, new=None):
             Graph on 10 vertices
             sage: G.name()
             ''
+
+        Name of an immutable graph :trac:`15681` ::
+
+            sage: g = graphs.PetersenGraph()
+            sage: gi = g.copy(immutable=True)
+            sage: gi.name()
+            'Petersen graph'
+            sage: gi.name("Hey")
+            Traceback (most recent call last):
+            ...
+            NotImplementedError: An immutable graph does not change name
         """
         if new is None:
             return getattr(self, '_name', "")