Spec valid attributes require category position
Add factory_girl to Gemfile
Include devise test helpers in rspec
Add factory_girl_rails to Gemfile instead of factory_girl
Enable devise sessions in specs
Set user at category creation
Sign_in user before each test using FactoryGirl
User knows categories last position
Set amount in expenditures valid attributes
Enable devise authentication in expenditures controller spec
Set expenditure user in expenditures controller spec
Fix expenditures controller spec to redirect to home page after create