I came to work for a company recently that has been working on a specific rails project for a while. Dropped in the middle of the development process, I'm beginning to go back and write tests for the existing code as well as the code currently being produced.

Testing the rails 4 app was easy enough, but once I got to testing the engine, I hit a mental block. After doing my due diligence, I found that most people take an approach like this (<http://viget.com/extend/rails-engine-testing-with-rspec-capybara-and-factorygirl>), but the common thread I saw in all of these responses was that people were building these apps from scratch, and thus had a dummy app generated for them automatically. I don't have the benefit of being able to generate everything from scratch, and have to work with what I was given, so what 

I'd like to know is if there's a way to retroactively generate *just* the dummy application. Is there something simple I can type into the console and have it generated for me? Or is there a longer, slightly less pretty route? Or would a different strategy be better altogether?