Run the tests:
% rake
In order to do this you must have gems bundled, Appraisal set up, and three databases configured.
% bundle --binstubs
% rake appraisal:install
% echo create database pacecar_test | mysql
% cd spec/dummy
spec/dummy% RAILS_ENV=test BUNDLE_GEMFILE=../../gemfiles/rails_4_mysql2_driver.gemfile bundle exec rake db:migrate
% createdb pacecar_test
% cd spec/dummy
spec/dummy% RAILS_ENV=test BUNDLE_GEMFILE=../../gemfiles/rails_4_pg_driver.gemfile bundle exec rake db:migrate
% cd spec/dummy
spec/dummy% RAILS_ENV=test % BUNDLE_GEMFILE=../../gemfiles/rails_4_sqlite3_driver.gemfile bundle exec rake db:migrate