https://guides.rubyonrails.org/testing.html https://guides.rubyonrails.org/testing.html Model tests, controller tests, integration tests, system tests. Its got

https://guides.rubyonrails.org/testing.html https://guides.rubyonrails.org/testing.html Model tests, controller tests, integration tests, system tests. Its got it all. Just run 'rails test'