text: import unittest
  
  from programy.extensions.energy.usage import EnergyUsageExtension
  
  class EnergyUsageExtensionTests(unittest.TestCase):
  
      def setUp(self):
          self.bot = None
          self.clientid = "testid"
  
      def test_usage(self):
  
          usage = EnergyUsageExtension()
          self.assertIsNotNone(usage)
  
          result = usage.execute(self.bot, self.clientid, "NOW")
          self.assertIsNotNone(result)
          self.assertEqual("0 0 KWh", result)