Websocket chat end to end testing with Cypress

Repository: https://github.com/nim-f/webrtc-react
Cypress documentation: https://docs.cypress.io/
Cypress task command https://docs.cypress.io/api/commands/task
Text version off the video https://medium.com/@codeandbird/end-to-end-testing-of-websocket-chat-app-with-cypress-cy-task-command-aa30471a60b8

The video is about e2e testing with cypress. I show how to install, configure, and write cypress tests for your app. And then we will see how to imitate second user connected to web socket server using cypress task command.
If you have your tips and tricks for cypress testing – write them in comments!