Well, if you don't have tests to ensure a service adheres to it's original promises, then yes, you'll need to run the full integrated system (I would probably d

Well, if you don't have tests to ensure a service adheres to it's original promises, then yes, you'll need to run the full integrated system (I would probably do it anyway, depending on the context). Reminds me of the fun time a major financial institution had one of their internal services provide fully 6 historical versions of it's api. Interestingly, they had not a single (automated) test for any of these.