code: def test_predict_length():
      """
      Tests that the length of the predict dataframe is equal to no of steps h
      """
      assert model_4.predict(h=5, oos_data=data_oos).shape[0] == 5
  
imports: import numpy
  import pandas
  import pyflux
label_desc: Use image node_id 11 for calling a global function with example usage: test_predict_length() without return types