[hartator]

I agree in parts. In real life, you can't always do integration tests against third parties for various reasons, the main one is that some websites/apps don't like to be taken as a sandbox to try out every CRUD operations we can have in mind. If you isolate too much, your code will be running against only itself and won't be again that useful. The way to assure software quality for our case is to carefully check on logs from data from real users, pretty regular actually. Not as sexy as TTD, but customers appreciate you take care about their real account or not another Foo Bar [e-mail] profile.