two version of R2R are hereHEADmaster

1 files changed, 33 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/networkx/algorithms/bipartite/tests/test_covering.py b/.venv/lib/python3.12/site-packages/networkx/algorithms/bipartite/tests/test_covering.py
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+++ b/.venv/lib/python3.12/site-packages/networkx/algorithms/bipartite/tests/test_covering.py
@@ -0,0 +1,33 @@
+import networkx as nx
+from networkx.algorithms import bipartite
+
+
+class TestMinEdgeCover:
+    """Tests for :func:`networkx.algorithms.bipartite.min_edge_cover`"""
+
+    def test_empty_graph(self):
+        G = nx.Graph()
+        assert bipartite.min_edge_cover(G) == set()
+
+    def test_graph_single_edge(self):
+        G = nx.Graph()
+        G.add_edge(0, 1)
+        assert bipartite.min_edge_cover(G) == {(0, 1), (1, 0)}
+
+    def test_bipartite_default(self):
+        G = nx.Graph()
+        G.add_nodes_from([1, 2, 3, 4], bipartite=0)
+        G.add_nodes_from(["a", "b", "c"], bipartite=1)
+        G.add_edges_from([(1, "a"), (1, "b"), (2, "b"), (2, "c"), (3, "c"), (4, "a")])
+        min_cover = bipartite.min_edge_cover(G)
+        assert nx.is_edge_cover(G, min_cover)
+        assert len(min_cover) == 8
+
+    def test_bipartite_explicit(self):
+        G = nx.Graph()
+        G.add_nodes_from([1, 2, 3, 4], bipartite=0)
+        G.add_nodes_from(["a", "b", "c"], bipartite=1)
+        G.add_edges_from([(1, "a"), (1, "b"), (2, "b"), (2, "c"), (3, "c"), (4, "a")])
+        min_cover = bipartite.min_edge_cover(G, bipartite.eppstein_matching)
+        assert nx.is_edge_cover(G, min_cover)
+        assert len(min_cover) == 8