Fix tests and Refactor

kobin/app.py

@@ -75,15 +75,12 @@ def _handle(self, environ):
             response = _handle_unexpected_exception(e, self.config.get('DEBUG'))
         return response
 
-    def wsgi(self, environ, start_response):
+    def __call__(self, environ, start_response):
+        """It is called when receive http request."""
         response = self._handle(environ)
         start_response(response.status, response.headerlist)
         return response.body
 
-    def __call__(self, environ, start_response):
-        """It is called when receive http request."""
-        return self.wsgi(environ, start_response)
-
 
 def _get_traceback_message(e):
     message = '\n'.join(traceback.format_tb(e.__traceback__))

tests/test_apps.py

@@ -85,7 +85,7 @@ def test_handled_body_message_when_404_not_found(self):
 
     def test_wsgi(self):
         test_env = {'REQUEST_METHOD': 'GET', 'PATH_INFO': '/'}
-        actual = self.app.wsgi(test_env, self.dummy_start_response)
+        actual = self.app(test_env, self.dummy_start_response)
         expected = [b'hello']
         self.assertEqual(actual, expected)
 
@@ -129,7 +129,7 @@ def test_get_traceback_message(self):
             actual = _get_traceback_message(e)
         else:
             actual = "Exception is not raised."
-        cause_of_exception = 'x = 1/0'
+        cause_of_exception = '1 / 0'
         self.assertIn(cause_of_exception, actual)
 
     def test_handle_unexpected_exception_should_return_500(self):