external services don't always have a test API, and it's not always as cut and dry as processing user payments. sometimes it's less important than that, and tes

external services don't always have a test API, and it's not always as cut and dry as processing user payments. sometimes it's less important than that, and testing it would require replicating an external server to be able to test it. in those cases the tradeoff of time spent vs. value isn't as clear.