We either mock or fake out the interfaces. I much prefer faking to mocking, because that still preserves a lot of the real-world behavior relevant to prod bugs

We either mock or fake out the interfaces. I much prefer faking to mocking, because that still preserves a lot of the real-world behavior relevant to prod bugs. A full prod reproduction would be a holy grail, but probably only attainable for complex distributed systems if we have access to a prebuilt staging-like environment. We're traversing the bridge between mocks, fakes and staging at this time.