thoughtbot/high_voltage — pull request #57 by timurvafin (2012-11-07 06:22:12+00:00)
Title: Remove extensions check from constraints with rspec

This is the branch based on https://github.com/thoughtbot/high_voltage/pull/55 but with refactored spec.

You mentiontiond to avoid `let` in spec to improve redabillity.
But I'm not sure it's valid for this case.