chore: import upstream snapshot with attribution

easygraph/functions/hypergraph/centrality/tests/test_degree.py

@@ -0,0 +1,38 @@
+import unittest
+
+import easygraph as eg
+
+
+class TestHypergraphDegreeCentrality(unittest.TestCase):
+    def test_basic_degree_centrality(self):
+        hg = eg.Hypergraph(num_v=4, e_list=[(0, 1), (1, 2), (2, 3), (0, 2)])
+        result = eg.hyepergraph_degree_centrality(hg)
+        expected = {0: 2, 1: 2, 2: 3, 3: 1}
+        self.assertEqual(result, expected)
+
+    def test_empty_hypergraph(self):
+        hg = eg.Hypergraph(num_v=1, e_list=[])
+        result = eg.hyepergraph_degree_centrality(hg)
+        self.assertEqual(result, {0: 0})
+
+    def test_single_edge(self):
+        hg = eg.Hypergraph(num_v=3, e_list=[(0, 1, 2)])
+        result = eg.hyepergraph_degree_centrality(hg)
+        expected = {0: 1, 1: 1, 2: 1}
+        self.assertEqual(result, expected)
+
+    def test_singleton_nodes(self):
+        hg = eg.Hypergraph(num_v=3, e_list=[(0,), (1,), (2,)])
+        result = eg.hyepergraph_degree_centrality(hg)
+        expected = {0: 1, 1: 1, 2: 1}
+        self.assertEqual(result, expected)
+
+    def test_node_with_no_edges(self):
+        hg = eg.Hypergraph(num_v=4, e_list=[(0, 1), (1, 2)])
+        result = eg.hyepergraph_degree_centrality(hg)
+        expected = {0: 1, 1: 2, 2: 1, 3: 0}  # node 3 has no edges
+        self.assertEqual(result, expected)
+
+
+if __name__ == "__main__":
+    unittest.main()