code: def test_cycle_motif():
      motif_generator = CycleMotif(5)
      assert str(motif_generator) == "CycleMotif(5)"
  
      motif = motif_generator()
      assert len(motif) == 2
      assert motif.num_nodes == 5
      assert motif.num_edges == 10
      assert motif.edge_index.tolist() == [
          [0, 0, 1, 1, 2, 2, 3, 3, 4, 4],
          [1, 4, 0, 2, 1, 3, 2, 4, 0, 3],
      ]
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_cycle_motif() without return types