I’m back from SoCraTes Day Switzerland where I help a Code&Hack session called “Testing the Impossible”.
The session is based on this Mercurial repository de.pdark.testing.
Transcript
Space Shuttle – They Write the Right Stuff
- Why wasn’t the bug caught by QA?
- Why did the bug escape dev?
- Personal Bug Diary
- Team Culture: Strengths va. Blame Game
- Miscommunication with Customers
- Anyone can press the “Red Button“
- Make failures cheap. Fail fast.
I’m wrong. I have learned something.- Bug-.hunting takes time and mindshare.
- If you found a bug, write a test for it
How do I test randomness?
- Test small pieces
- Fix things that varies (IDs, timestamps, etc.)
How do I test a DB?
Layer between DB and App code which allows to switch between real DB and mock- Verify generated SQL instead of executing it
- Fast
- Allows to test thousands of combinations easily
- Useful for code that builds search queries
- Run SQL against real DB during the night (CI server)
- H2 embedded DB can emulate Oracle, MySQL, PostgreSQL, …
- Test at various depths (speed vs. accuracy)
- Testing Walrus dives deep!
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