new_contents: import unittest
  import weather_loading as wl
  import numpy as np
  
  class TestSets(unittest.TestCase):
      
      def test_1Station_validTime(self):
          """
      
          """
          test_id = '00044'
          df = wl.load_dataframe(test_id,'20140101','20150101')
          station_id = np.unique(df[test_id]['Station ID'])
          
          self.assertEqual(len(station_id),1)
          self.assertEqual(station_id[0],int(test_id))
  
  if __name__ == '__main__':
      unittest.main()
subject: test file added