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POUnitTesting the webapp.RequestHandler in GAE - Python
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  1. POUnitTesting the webapp.RequestHandler in GAE - Python
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    copied!<p>I'm struggling on how to setup my environment for TDD with Google App Engine - Python. (I'm also pretty new to Python). My environment is as follows:</p> <ul> <li>Google App Engine 1.5.0</li> <li>IntelliJ 10.2</li> <li>IntelliJ setup to use Python 2.5.4 for this project</li> </ul> <p>I am using IntelliJ with the Python plugin, so running unittests is as simple as hitting ctrl-shft-f10. </p> <p>I've also read the documentation on testbed and have successfully tested the datastore and memcache. However, where I am stuck is how do i unittest my RequestHandlers. I've scanned a lot of articles on Google and most of them seem to be pre merging of gaetestbed into gae as testbed.</p> <p>In the following code sample, i would like to know how to write a unit test (which is runnable in intellij) which tests that a call to '/' returns -> Home Page</p> <pre><code>from google.appengine.ext import webapp import wsgiref.handlers class MainHandler(webapp.RequestHandler): def get(self): self.response.out.write('Home Page') paths = [ ('/', MainHandler) ] application = webapp.WSGIApplication(paths, debug=True) def main(): wsgiref.handlers.CGIHandler().run(application) if __name__ == '__main__': main() </code></pre> <p>From Nick Johnson's answer below, I added a new folder named test and added a file to that folder called unit_test.py. To that file I added the following code (Modified from Kris' answer below):</p> <pre><code>from StringIO import StringIO from main import MainHandler import unittest from google.appengine.ext import webapp class MyTestCase(unittest.TestCase): def test_get(self): request = webapp.Request({ "wsgi.input": StringIO(), "CONTENT_LENGTH": 0, "METHOD": "GET", "PATH_INFO": "/", }) response = webapp.Response() handler = MainHandler() handler.initialize(request, response) handler.get() self.assertEqual(response.out.getvalue(), "Home Page") </code></pre> <p>And it now works!</p>
 

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