holler at yer boy

testing

I'm looking to do small testing on a sinatra app I've been building.

https://github.com/cheezedigital/itempiece6

I'd like the test to be small, though I'd like to test every page in the application. 

like, 

test "should get about" do
    get :about
    assert_response :success
    assert_select "title", "About | learnmesomecodes bye felicia"
end

while I understand what is exactly happening, I don't know which gem to include in the Gemfile, and how to set up the directory/file structure. 

if one could shed some lite, I'd appreciate it.