What does "rake test:functionals" do?

I am brand new to ruby, and am starting to build a little shopping cart app, as a basic introduction. I was editing a test file, in the directory /test/开发者_运维技巧functional/ but made a typo and hit enter, after typing "rake test:functionals" into the CLI.

I don't know enough about what this does, or how I can go back to where I was before. When I first tried it, everything was fine, but then when I tried to add some additional functionality it fell apart.

"rake test:functionals" is to run all your rails functional tests which are testing the rails controllers functionality.

You can look at rails guide on testing for further information, the link also explain other kind of test in rails.