code: def test_dba():
      """Test dba functionality."""
      X_train = create_test_distance_numpy(10, 10, 10)
  
      average_ts = dba(X_train)
  
      assert isinstance(average_ts, np.ndarray)
      assert average_ts.shape == X_train[0].shape
      assert np.allclose(average_ts, expected_dba)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_dba() without return types