def test_union(self): self.assertEqual(graph.union([1, 2], [2, 3]), [1, 2, 3])
def test_union(self): self.assertEqual(graph.union([1,2],[2,3]), [1,2,3])
def test_union(self): self.assertEqual(graph.union([1, 2], [2, 3]), [1, 2, 3])
def test_union(self): self.assertEqual(graph.union([1,2],[2,3]), [1,2,3])