Unit testing code using 'requests' with the 'fudge' library.

example.py

# this is the example code with the what we need to test.

import requests
def function_under_test():
    '''return True if www.example.com is accessible'''
    alive = False
    try:
        response = requests.get('http://www.example.com')
        response.raise_for_status()
        alive = True
    finally:
        return alive

test_example.py

# this is all the test code
# fudge docs: http://farmdev.com/projects/fudge/

# from example import function_under_test

try:
    # python < 2.7
    import unittest2 as unittest
except ImportError:
    import unittest

import requests
import fudge

class HttpRequestsTests(unittest.TestCase):
    @fudge.patch('requests.get')
    def test_website_up(self, fake_get):
        # pre-can a successful response
        (fake_get.expects_call()
            .returns_fake()
            .has_attr(status_code=200, text='ok')
            .provides('raise_for_status')
            .returns(None)
        )
        # the contract is that it should return True.
        self.assertTrue(function_under_test())
    @fudge.patch('requests.get')
    def test_website_down(self, fake_get):
        # pre-can an error as a response
        (fake_get.expects_call()
            .returns_fake()
            .has_attr(status_code=500, text='down')
            .provides('raise_for_status')
            .raises(requests.HTTPError('website down.'))
        )
        # the contract is that is should return False.
        self.assertFalse(function_under_test())

if __name__ == '__main__':
    unittest.main()