You can clone with
Create the UI for live testing
Can't just rely on half-arsed unit-testing.
Implement just enough of JCSURLFormatter to pass the tests
Still need to test validation using the block.
Implement -stringForObjectValue so that it passes a test
Very simple at the moment, and relies on an assumption of the object type.
Create a new designated initialiser for the formatter
Add the stub JCSURLFormatter class
Does nothing at the moment. Specifically, this will make the tests fail.
Nothing to see here, yet, just a stock Xcode4 project with unit tests