[samsaccone]

author here:

Pioneer uses cucumber and Pioneer for its tests, you are correct. We also have a suite of unit tests that are powered by mocha.

Since we wanted true integration tests we choice to use Pioneer to test Pioneer. We wanted our feature files to act as documentation thus Cucumber was a clear choice.

As far as precedence goes ... This is not an uncommon pattern

Mocha uses mocha to test https://github.com/visionmedia/mocha/blob/master/test/http.m...