Ask HN: Testing Code Changes Against Production

I’m currently reaching out here to see if anybody has any advice on testing code prior to pushing to production. I write unit / integration tests to make sure code is as correct as possible, but I don’t have any way of actually testing it against real, production traffic to know for sure.

Writing a unit / integration test for every potential edge case doesn’t seem scalable - wondering if there’s a way to test code changes directly against production traffic without exposing users to potentially breaking changes?

A canary comes to mind but serving real production traffic would expose users to potentially breaking changes?

How do you guys handle this at your companies? Would appreciate any thoughts.