def negative_value_testing(self):
     self.assertEqual(kelvinToCelcius(-200.0), 173.15)
 def big_value_testing(self):
     self.assertEqual(kelvinToCelcius(937538), 937938.15)
 def zeroBasedValue_testing(self):
     self.assertEqual(kelvinToCelcius(0.0), 273.15)
 def decimal_value_testing(self):
     self.assertEqual(kelvinToCelcius(200.22), 373.37)
 def positiveValue_testing(self):
     self.assertEqual(kelvinToCelcius(300.0), 573.15)