Added rspec tests for layout_helper.rb

File is spec/helpers/layout_helper_spec.rb
https://www.pivotaltracker.com/story/show/82977718

general advice, tying the functionality specific HTML elements is generally not a good idea. Also keeping the CSS specificity low is good practice (see http://css-tricks.com/specifics-on-css-specificity/), if you can get away with less, always go for less.