new_contents: import pandas as pd
  import pytz
  
  from pandas_market_calendars.exchange_calendar_cme_agriculture import CMEAgricultureExchangeCalendar
  
  
  def test_time_zone():
      assert CMEAgricultureExchangeCalendar().tz == pytz.timezone('America/Chicago')
      assert CMEAgricultureExchangeCalendar().name == 'CME_Agriculture'
  
  
  def test_2016_holidays():
      # good friday: 2016-03-25
      # christmas (observed): 2016-12-26
      # new years (observed): 2016-01-02
      cme = CMEAgricultureExchangeCalendar()
      good_dates = cme.valid_days('2016-01-01', '2016-12-31')
      for date in ["2016-03-25", "2016-12-26", "2016-01-02"]:
          assert pd.Timestamp(date, tz='UTC') not in good_dates
  
  
  def test_2016_early_closes():
      # mlk day: 2016-01-18
      # presidents: 2016-02-15
      # mem day: 2016-05-30
      # july 4: 2016-07-04
      # labor day: 2016-09-05
      # thanksgiving: 2016-11-24
  
      cme = CMEAgricultureExchangeCalendar()
      schedule = cme.schedule('2016-01-01', '2016-12-31')
      early_closes = cme.early_closes(schedule).index
  
      for date in ["2016-01-18", "2016-02-15", "2016-05-30", "2016-07-04",
                   "2016-09-05", "2016-11-24"]:
          dt = pd.Timestamp(date, tz='UTC')
          assert dt in early_closes
  
          market_close = schedule.loc[dt].market_close
          assert market_close.tz_convert(cme.tz).hour == 12
  
  
  def test_dec_jan():
      cme = CMEAgricultureExchangeCalendar()
      schedule = cme.schedule('2016-12-30', '2017-01-10')
  
      assert schedule['market_open'].iloc[0] == pd.Timestamp('2016-12-29 23:01:00', tz='UTC')
      assert schedule['market_close'].iloc[6] == pd.Timestamp('2017-01-10 23:00:00', tz='UTC')
  
subject: Add test stub for agriculture