Brief Python Nose/Mock Snipppet

I've been using Nose and Mock recently for unit and integration testing. It's been quite fun.

Remember that @patch sets the namespace of the module you provide so that the test function finds the @patch setted object first. This allows you to test with Mock objects and is called monkey patching.

Here's a quick example,

	#!/usr/bin/env python
	import urllib
	class Worker(object):
	def __init__(self, myurl):
	self.myurl = myurl
	def dowork(self):
	resp = urllib.request.urlopen(self.myurl)
	print(resp.read())

view raw worker.py hosted with ❤ by GitHub

	#!/usr/bin/env python
	import nose, unittest
	from unittest import mock
	from unittest.mock import patch
	from worker import Worker
	class WorkerTest(unittest.TestCase):
	def setUp(self):
	self.wrkr = Worker('http://www.234234ljk.com')
	return
	@patch('worker.urllib.request.urlopen', auto_spec=True)
	def dowork_test(self, urlopen):
	myobj = mock.Mock()
	myobj.read.return_value = "This was successfully mocked."
	urlopen.return_value = myobj
	self.wrkr.dowork()
	assert True == myobj.read.called
	if '__main__' == __name__:
	nose.main() # nose is so cool

view raw worker_test.py hosted with ❤ by GitHub

run with debugging by typing,

python workter_test.py --pdb