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How much flakiness do you tolerate in end to end tests?
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this post was submitted on 30 Aug 2023
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My org has issues with e2e, but we keep them because they usually inform that something, somewhere isn't quite right.
Our CI/CD pipeline is configured to automatically re-run a build if a test in the e2e suite fails. If it fails a second time, then it sends up the usual alerts and a human has to get involved.
In addition to that, we track transient failures on the main branch and have stats on which ones are the noisiest. Someone is always peeling the noisiest one off the stack to address why it's failing (usually time zones or browser async issues that are easy to fix).
It's imperfect, and still results in a lot of developers just spam retrying builds to "get stuff done", but we've decided the signal to noise ratio is good enough that we want to keep things the way they are.