text: try:
      import sys, os
      sys.path.append(os.path.abspath(os.path.join('..')))
  
      import unittest
      import numpy as np
      from numpy.testing import assert_almost_equal, assert_equal, assert_string_equal
      from numpy.testing import assert_allclose, assert_raises, assert_raises_regex
      from app import app
      from app.lib import recommender_data
      from app.lib.recommender_data import calculate_score, calculate_rates
  
  except Exception:
      print('some modules missing.')
  
  
  class FlaskTests(unittest.TestCase):
  
      self.arr1 = np.ones((2,2))
      self.arr2 = np.full((2,2), 6)
  
      def test_basic_test(self):
          out = {}
          assert_equal(isinstance(out, dict), True)
      
      # calculate_score test - return type
      def test_calculate_score(self):
          val = int(calculate_score(self.arr2))
          self.assert_equal(isinstance(val, int), True)
  
  
      # calculate_rates test - return type
      def test_calculates_rates(self):
          self.assert_equal(isinstance(calculate_rates(self.arr1, self.arr2), np.ndarray), True)
  
  
      # route test (check status code)
      def test_homepage(self):
  	test = app.test_client(self)
  	response = test.get('/demo1')
  	self.assertEqual(response.status_code, 200)
  
  if __name__ == '__main__':
  	unittest.main()
  