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POHow to unit test/mock requests.get(url) & its response
 

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  1. POHow to unit test/mock requests.get(url) & its response
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    <p>I am having trouble unit testing a function that uses Kenneth Reitz's <a href="http://docs.python-requests.org/en/v2.0-0/index.html" rel="nofollow">requests</a> library: </p> <p>The following function is to be unit tested:</p> <pre><code>def getPage(url): r = requests.get(url) r.raise_for_status() # raises HTTPError if necessary dom = fromstring(r.text) dom.make_links_absolute(url) return dom </code></pre> <p>My unit test is at the moment as follows. (Though clearly this does not work.)</p> <pre><code>@patch('requests.Response') @patch('requests.Response.raise_for_status', return_value=None) @patch('requests.get', return_value=requests.Response) def test_getPage(mock_requests_get, mock_RFS, mock_response): with open("domtest.htm", "r") as testfile: mock_response.text = testfile.read() dom = getPage('http://www.test.com') eq_(dom, dom_test) </code></pre> <p>The resulting traceback is:</p> <pre><code>Traceback (most recent call last): File "C:\Anaconda\lib\site-packages\nose\case.py", line 197, in runTest self.test(*self.arg) File "C:\Anaconda\lib\site-packages\mock.py", line 1201, in patched return func(*args, **keywargs) File "C:\...\test_myfile.py", line 79, in test_getPage dom = getPage('http://www.test.com') File "C:\...\myfile.py", line 67, in getPage r.raise_for_status() # raises HTTPError if necessary TypeError: unbound method raise_for_status() must be called with Response instance as first argument (got nothing instead) </code></pre> <p>How does one unit test a function like this using mocking rather than a temporary webserver? I tried pickling the response and setting it instead as return value for requests.get() but it cannot be pickled.</p>
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