human
Solve the following python programming problem given the following code:
@ patch ('bugsnag.notification.deliver') 
def test_bugsnag_middleware_working(self, deliver) : 
    def BasicWorkingApp(environ, start_response) : 
        start_response ('200 OK', [('Content-Type', 'text/plain.
charset=utf-8')]) 
        return iter ([b'OK']) 
app = TestApp (BugsnagMiddleware (BasicWorkingApp)) 
    resp = app.get ('/', status = 200) 
    self.assertEqual (resp.body, b'OK') 
    self.assertEqual (app.call_count, 0) 

    
    

    Fix the buggy line: self.assertEqual (app.call_count, 0)
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual (deliver.call_count, 0)