Puppet has to be one of the worst peices of software I've ever used. The language is full of terrible ideas (lets get rid of loops since those confuse sysadmins and make the only replacement require combinators via the goofy custom functions) and the documentation is full of broken links. Hira data always leaves you guessing at what a value actually is. It's like JS, you can make it work but it requires a ton of discipline and effort and is just ridiculous.
If you need to write unit tests for your deployment automation then you might be over complicating it.
If you need to write unit tests for your deployment automation then you might be over complicating it.