How do I run test for my survey in code pen

Can someone tell me how I could test my survey form, because in other people code pen project, they have this “Select text suite” thing that test the project base on what it is.

Why not use the built-in editor for the Build a Survey Form project to run the tests?

I did it already, but I saw some survey or website on code pen that show a small box which allow us to check our work to see if it pass all the requirements or not. So, I also want to try it, but I dont know how.

You can add https://cdn.freecodecamp.org/testable-projects-fcc/v1/bundle.js as one of the external links under the JS module to test using Codepen.