language: ruby
rvm:
  - 2.2.2
env:
  - AR="~> 4.2.0" NOKOGIRI_USE_SYSTEM_LIBRARIES=1
  - AR="~> 5.0.0" NOKOGIRI_USE_SYSTEM_LIBRARIES=1
  - AR=">= 5.1.0.rc2,< 5.2" NOKOGIRI_USE_SYSTEM_LIBRARIES=1
  - AR=">= 5.2.0.rc2,< 5.3" NOKOGIRI_USE_SYSTEM_LIBRARIES=1
script: bundle exec rake specs:travis