Full Clean Factories

Researching the model instance factories available for Django and how well they create valid objects for our tests.

In this talk I present my research into various Django factories. Full write-up is available at http://jamescooke.info/django-factory-audit.html

Transcript

1. Full Clean Factories James Cooke Licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
2. Outline • Problem • Libraries • Grading factories • Factory features • Results
3. Problem
4. Factories • Django Fakery • Factory Boy • Factory Djoy • Hypothesis[django] • Mixer • Model Mommy
5. Grading factories: Test • Two models: User and Item • Two factories: UserFactory and ItemFactory • Create 10 instances class Item(models.Model): name = models.CharField( max_length=1, unique=True)
6. Grading factories: Grades • RED: Creates invalid instances • YELLOW: Raises exception • GREEN: Creates valid instances
7. Factories Factory ItemFactory UserFactory Django Fakery RED YELLOW Factory Boy RED RED Factory Djoy YELLOW GREEN Hypothesis[django] RED RED Mixer GREEN GREEN Model Mommy YELLOW GREEN
8. Final points • Factories are made of two parts • Hypothesis could win • Test code on GitHub: https://github.com/jamescooke/factory_audit/ • Full write-up tomorrow http://jamescooke.info/
9. Thanks! • @jamesfublo • Ask questions • Let’s talk more about testing • Thanks for listening! Licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.