Stubs/doubles vs mocks
Stub is simple fake object. It just makes sure test runs smoothly.
Mock is smarter stub. You verify Your test passes through it.
Good stack exchange link on this
Tip 26: "select" isn't broken (debugging strategies)
JP: "what does your program think is going on": DON'T BLAME EXTERNAL FACTORS FIRST. It's probably your code haha!
John: why, when faced with a "surprising" failure, you must realize that one or more of your assumptions is wrong.
Tip 27: Don't assume it - prove it
JP: "routine" code isn't infallible! did you test all of the edge cases?
I really like the debugging checklist so here it is:
- Is the problem being reported a direct result of the underlying bug, or merely a symptom?
- Is the bug really in the compiler? Is it in the OS? Is it in your code?
- If you explained this problem in detail to a coworker, what would you say?
- If the suspect code passes its unit tests, are the tests complete enough?
- Do the conditions that caused this bug exist anywhere else in the system?
John: Duplicate the problem in tests.
Tip 28: learn a text manipulation language
examples of text manipulation:
- generating web docs
- test data generation
- book writing
- etc
JP: Funny enough, Hunt and Thomas like using Ruby (and Perl) to quickly hack short scripts
John: I want to push more into this - Just barely experimenting with self-creating API docs. Even just things like in ruby: writing a rake task to pull out all your custom objects and methods to start docs and get a clear picture has been helpful for me.
Tip 29: Write code that writes code
passive vs active code generators
passive = run once to produce a result
active = run every time you need a result. results are then thrown away
JP: meta programming? code gen doesnt have to be meta
John: Refactoring methods to "Find common resources" based on "Model" name - Reducess code significantly.
Picks
- JP: Sergei Rachmaninoff: Piano Concertos Nos. 2 & 3. Good classic music
- John: iOS Keyboard push down trick
RANDOM LINKS MENTIONED! 🎉
iteration