code: def test_nan_inf():
      posterior = stan.build(program_code)
      fit = posterior.sample()
      assert fit is not None
      assert math.isnan(fit["alpha"].ravel()[0])
      assert math.isinf(fit["beta"].ravel()[0])
      assert math.isinf(fit["gamma"].ravel()[0])
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_nan_inf() without return types