Short story on testing

Hello folks,

I thought I’d quickly share an experience I had this morning.

I have a before_save callback in one of my models that sets a
boolean attribute depending on the value of another attribute.

I’m heavily into test-driven devt these days, thanks to the
peepcode screencast, and saw that my unit test for that model
had failures.

I racked my brain for 30 minutes before I realized what was
happening. Since Ruby returns the value of the last statement
as the method’s return value, my before_save was returning
false when the attribute was set to false, which of course halted
Rails’ callback/validation chain, which led to my test failure.

Without proper tests, that error would have easily slipped
through to production. Thanks to TDD, it didn’t.


This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs