code: def test_skewt_predict_is_length():
      """
      Tests that the prediction IS dataframe length is equal to the number of steps h
      """
      model = pf.GAS(data=data, ar=1, sc=1, family=pf.Skewt())
      x = model.fit()
      assert model.predict_is(h=5).shape[0] == 5
  
file_path: pyflux/pyflux/gas/tests/gas_tests_skewt.py
imports: import numpy
  import pyflux
label_desc: Use image node_id 11 for calling a global function with example usage: test_skewt_predict_is_length() without return types