Cypress-flaky-testaudit: Thriving In The Cypress 'dual-verse' For...

When flaky tests stop being "random" and start being a pattern, it is time to stop guessing and start auditing. This is the story of how to make peace with Cypress’ Dual-Verse... and actually win.

At some point in every Cypress project, a test fails.

Then it happens again. And again. And somehow only on Tuesdays, only in CI, or only when Mercury is in retrograde.

Welcome back to the Cypress Dual-Verse: the place where synchronous JavaScript and Cypress’ asynchronous command queue coexist peacefully… until they absolutely don’t.

If this sounds familiar, you are not alone. In one of my previous articles, I went deep (very deep) into why Cypress behaves this way and how mixing sync JS with async commands can quietly sabotage your tests:

👉 The Async Nature of Cypress: Don’t Mess With the Timelines

I definitely wanted to write an article about how this asynchronous command queue works, but I wanted to approach it in a way that is easier to understand and more intuitive, without sacrificing depth or the practical knowledge you actually need to tackle it effectively.

That is when I came up with the idea of presenting it as a quirky 'dual-universe' concept, using a very visual diagram so you can clearly see what is going on behind the scenes.

For a long time after publishing the article, a (somewhat crazy) idea kept spinning in my head… What if I could see exactly this while implementing and running those rebellious tests that keep failing or behaving flakily, tests where I can’t quite put my finger on why, but I strongly suspect (and I’m usually right) that race conditions are to blame?

But man! This is not an easy task. It would mean diving deep into low-level test details and command interactions, then somehow turning all that chaos into something clear, understandable, and fully portable to a CI/CD pipeline.

Source: Dev.to