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Thanks, mogronalol. I agree that visualisations would be useful and I think using tests to create a virtualised service definitely has merit, because it kills two birds with one stone. I like the fact that I can give my consumers/clients something that they can use to test with without having to set up or give away the real thing.

In terms of process there's a big difference with tools like Swagger though in that you have to create the tests and corresponding implementation before you can start integration testing consumers, which might be tricky if you have multiple teams working on new services. I guess this is only really a problem when you're starting out as the tests and implementation should be ready soon after.

If we just use this for testing I was also wondering if you would use this at the beginning of your project or would you add it when the test suite start slowing down?