diff options
| -rw-r--r-- | networkx/classes/tests/test_digraph.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/networkx/classes/tests/test_digraph.py b/networkx/classes/tests/test_digraph.py index c8e86557..b9972f9a 100644 --- a/networkx/classes/tests/test_digraph.py +++ b/networkx/classes/tests/test_digraph.py @@ -244,6 +244,8 @@ class TestDiGraph(BaseAttrDiGraphTester, _TestGraph): assert G.adj == {0: {1: {}}, 1: {}} assert G.succ == {0: {1: {}}, 1: {}} assert G.pred == {0: {}, 1: {0: {}}} + with pytest.raises(ValueError, match="None cannot be a node"): + G.add_edge(None, 3) def test_add_edges_from(self): G = self.Graph() @@ -258,6 +260,8 @@ class TestDiGraph(BaseAttrDiGraphTester, _TestGraph): G.add_edges_from([(0, 1, 2, 3)]) # too many in tuple with pytest.raises(TypeError): G.add_edges_from([0]) # not a tuple + with pytest.raises(ValueError, match="None cannot be a node"): + G.add_edges_from([(None, 3), (3, 2)]) def test_remove_edge(self): G = self.K3.copy() |