code: def test_misc():
      # Test defaults (order = 0, demean=True)
      endog = lake.copy()
      res, _ = burg(endog)
      assert_allclose(res.params, np.var(endog))
  
      # Test that integer input gives the same result as float-coerced input.
      endog = np.array([1, 2, 5, 3, -2, 1, -3, 5, 2, 3, -1], dtype=int)
      res_int, _ = burg(endog, 2)
      res_float, _ = burg(endog * 1.0, 2)
      assert_allclose(res_int.params, res_float.params)
  
file_path: statsmodels/statsmodels/tsa/arima/estimators/tests/test_burg.py
imports: import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_equal, assert_raises
  from statsmodels.tsa.innovations.arma_innovations import arma_innovations
  from statsmodels.tsa.arima.datasets.brockwell_davis_2002 import dowj, lake
  from statsmodels.tsa.arima.estimators.burg import burg
label_desc: Use image node_id 7 for calling a global function with example usage: test_misc() without return types