podcast-javascript-jabber-146-react "he talks about using regular expressions and good TDD to create multiple implementations of the CSS flex box tool"
Also loosely related to the mvp-vs-mvvm-vs-presentation-model stuff (since I think that user-specified behavior in MVVM tests (described in write-view-model-tests-at-the-level-of-intent is an ideal candidate for this type of thing)
Loosely related to c-plus-plus-iphone-android ( It's another idea for not duplicating effort on all the platforms. Perhaps a slightly more pragmatic one. )