language: ruby
rvm:
  - 2.3
  - 2.4

env:
  global:
    - DISPLAY=":99.0"

before_install:
  - sh -e /etc/init.d/xvfb start

script: bundle exec rake

addons:
  apt:
    packages:
      - pkg-config
      - gtk-doc-tools
      - libgtk-3-dev
      - libfreetype6-dev # for font function
      - libglib2.0-dev # for font functions / tests / utils
      - libcairo2-dev # for utils
      - libicu-dev # for extra unicode functions
      - libgraphite2-dev # for extra shapers
      - libgirepository1.0-dev # for gobject-introspection