code: def test_predict_length():
      """
      Tests that the prediction dataframe length is equal to the number of steps h
      """
      model = pf.VAR(data=data, lags=2)
      x = model.fit()
      assert model.predict(h=5).shape[0] == 5
  
file_path: pyflux/pyflux/var/tests/var_tests.py
imports: import numpy
  import pyflux
  import pandas
label_desc: Use image node_id 5 for calling a global function with example usage: test_predict_length() without return types