My first experience with E2E: Jest and Puppeteer

I have heard a lot of E2E tests and how important they are to make products, especially the front-end side, more robust. However, I did not have any chance to work with them.

And just in time, when working in Edit Flow, there was a strange issue that E2E tests failed, then suddenly worked, and then failed. I worked on it and learned a few interesting things.