[pjmlp]

Because given how GUI frameworks are implemented, one needs to add explicit workarounds to follow "only write code for which there is a failing test".

After all, writing the test needs to be possible, to start with.

So adapters, views, commands and what have you need to exist only to fulfill such purpose, and even then, their interactions with the GUI layer don't get tested.

So one is creating them, without knowing if they are the right elements for the GUI layout.

Hence why testing, 100% behind it, TDD not so much.