new_contents: from unittest import TestCase
  from kobin.routes import Router
  
  
  class RouterTest(TestCase):
      def setUp(self):
          self.router = Router()
  
      def test_add_func_when_input_static(self):
          def target_func(): pass
          self.router.add('/user/', 'GET', target_func)
  
          actual = self.router.static
          self.assertIn('GET', actual)
          self.assertIn('/user/', actual['GET'])
          expected_tuple = (target_func, None)
          self.assertTupleEqual(actual['GET']['/user/'], expected_tuple)
  
subject: Add Test of static routing