unit testing - Mocking a side_effect with Python unittest -

i'm trying mock out requests.get have status code of 200 , make history[0].status_code trigger indexerror (since there no redirects). i'm able status_code return 200, when mock out history desired side effect, indexerror not triggered.

@patch('requests.get') def test_no_redirect(self, mock_requests):     mock_requests.return_value.status_code = 200     mock_requests.history[0].status_code.side_effect = indexerror()      response = requests.get('example.com')      self.assertraises(indexerror, response.history[0].status_code)                 self.asserttrue(200, response.status_code) 

ok, checked code , i'd mention few things.

first of assertrises method receives callable second parameter ;) definition looks

def assertraises(self, excclass, callableobj=none, *args, **kwargs): 

the second thing, if mocking status_code using

mock_requests.return_value.status_code = 200 

why not try same history:

mock_requests.return_value.history = [] 

we using real list instead of kind of mock, think it's better. test method this:

@patch('requests.get') def test_no_redirect(self, mock_requests):     mock_requests.return_value.status_code = 200     mock_requests.return_value.history = []      mock_requests.history[0].status_code.side_effect = indexerror      response = requests.get('example.com')      self.assertraises(indexerror, lambda: response.history[0])     self.asserttrue(200, response.status_code)