old_contents: import datetime
  
  from midas import mix
  from midas.midas import estimate, forecast
  
  
  def test_estimate(gdp_data, farmpay_data):
  
      y, yl, x, yf, ylf, xf = mix.mix_freq(gdp_data.gdp, farmpay_data.farmpay, 3, 1, 1,
                                           start_date=datetime.datetime(1985, 1, 1),
                                           end_date=datetime.datetime(2009, 1, 1))
  
      res = estimate(y, yl, x)
  
      fc = forecast(xf, ylf, res)
  
      print(fc)
  
      assert False
  
new_contents: import datetime
  import numpy as np
  
  from midas import mix
  from midas.midas import estimate, forecast
  
  
  def test_estimate(gdp_data, farmpay_data):
  
      y, yl, x, yf, ylf, xf = mix.mix_freq(gdp_data.gdp, farmpay_data.farmpay, 3, 1, 1,
                                           start_date=datetime.datetime(1985, 1, 1),
                                           end_date=datetime.datetime(2009, 1, 1))
  
      res = estimate(y, yl, x)
  
      fc = forecast(xf, ylf, res)
  
      print(fc)
  
      assert np.isclose(fc.loc['2011-04-01'][0], 1.336844, rtol=1e-6)
  
subject: Add assertion for forecast test