text: import unittest
  
  import numpy as np
  
  from HCRSimPY.models import SinglePopModel
  
  
  class SinglePopModelTests(unittest.TestCase):
  
  
      def testAlpha(self):
          sp = SinglePopModel(lambda t: 100.0)
          for t in np.arange(0,100,0.1):
              aval=sp.alpha0(t)
              self.assertGreaterEqual(aval,0.0, msg="Test alpha function")
  
  
  if __name__ == '__main__':
      unittest.main()
  