Talk I gave at PyCon Sweden 2015

1. Test Driven Development
with Python and Django

2. Who the F**lavia?

3. Agenda
1. Good code and bad code
2. What is TDD?
3. Why TDD?
4. How to TDD?
5. Continuous Integration

4. good code and bad code

6. undead code

7. what is TDD?

9. why TDD?

11. testing for design

14. how to TDD?

16. “You are not allowed to write any production
code unless it is to make a failing test pass.”

17. “You are not allowed to write any more of a test
than is sufficient to fail; and compilation failures
are failures.”

18. “You are not allowed to write any more
production code than is sufficient to pass the
one failing test.”

19. testing smells

20. def test_should_request_and_be_success(self):
response = self.client.get(“/posts”)
self.assertEqual(200, response.status_code)

21. def test_should_have_posts_on_ctx(self):
response = self.client.get(“/posts”)
self.assertIn(“posts”, response.context_data)

22. def test_should_list_posts_in_chronological_order(self):
r = self.client.get(“/posts”)
expected_posts = [p1, p2, p3, p4] # keep the order
self.assertQuerySetEqual(r.context_data[“posts”],
expected_posts)

23. Tools
● unittest
● django.test.TestCase
● nose
● py.test
● ...

24. CI - Continuous Integration
● drone.io
● travisci
● circleci
● jenkins
● hudson
● ...

25. Tack så mycket!
Flavia Missi
@flaviamissi
https://github.com/flaviamissi

26. Tack så mycket!
● http://butunclebob.com/ArticleS.UncleBob.
TheThreeRulesOfTdd
● http://butunclebob.com/ArticleS.UncleBob.
TheBowlingGameKata
● http://extremeprogramming.org/