DI example

gistfile1.py

class SakaiAPI(object):
  def authenticate(self, token):
    return requests.post(...).json()


class MockSakaiAPI(SakaiAPI):
  def __init__():
    self.is_authenticated = True
    
  def authenticate(self, token):
    return {'is_authenticated': self.is_authenticated}


def get_sakai_grades(token, sakai_api=SakaiAPI()):
  sakai_api.authenticate(token)
  sakai_api.get_grades(...)
  ...

  
def my_sakai_test():
  sakai_api = MockSakaiAPI()
  sakai_api.is_authenticated = False
  token = ...
  self.assertRaises(lambda: get_sakai_grades(token, sakai_api=sakai_api), Exception)
  sakai_api.is_authenticated = True
  self.assertEqual(get_sakai_grades(token, sakai_api=sakai_api)['grade_data'], ...)