language: ruby
cache: bundler
rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.2
  - 2.2.4
  - 2.3.0
gemfile:
  - gemfiles/Gemfile.activemodel-3.2.x
  - gemfiles/Gemfile.activemodel-4.0.x
  - gemfiles/Gemfile.activemodel-4.1.x
  - gemfiles/Gemfile.activemodel-4.2.x
script:
  - bundle exec rake spec
before_install: gem install bundler