Input / Output testing

> Author: Thomas Laforge ### Information ... ### Statement: .... ### Submitting your work 1. Fork the project 2. clone it 3. npm install 4. `npx nx serve testing-input-output` to play with the application 5. `npx nx test testing-input-output` to test your application with Testing Library 6. `npx nx component-test testing-input-output --watch` to test your application with Cypress 7. _...work on it_ 8. Commit your work 9. Submit a PR with a title beginning with **Answer:19** that I will review and other dev can review. input output testing _You can ask any question on_ twitter