text: from temperature import Temperature
  import unittest
  
  class Test_Kelvin(unittest.TestCase):
      
      def test_celsiustokelvin(self):
          self.assertEqual(Temperature(celsius=36).kelvin, 309.15)
  
      def test_fahrenheittokelvin(self):
          self.assertEqual(Temperature(fahrenheit=33).kelvin, 273.7055555555555)
  
      def test_kelvintokelvin(self):
          self.assertEqual(Temperature(kelvin=310).kelvin, 310)
  
      def test_negative_kelvintokelvin(self):
          self.assertEqual(Temperature(kelvin=-285).kelvin, -285)
  
  if __name__ == '__main__':
      unittest.main()