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This code was used in a presentation on BDD and RSpec, and probably won’t make much sense on its own. It’s a partial implementation of a trivial caching hash class, with file and memory stores behind it.

There are tags for each step through the development, with some points of interest being:

• step4: nested specs
• step6: pending spec
• step7: specifying exceptions
• step12: shared behaviour

There are also two files in master — bad_spec.rb and good_spec.rb, which both pass, but one of which is intended to show better practice.