language: ruby

rvm:
  - 2.3
  - 2.4
  - 2.5
  - 2.6
  - jruby-9.1.5.0
  - ruby-head

env:
  - COVERAGE=1

cache:
  - bundler

matrix:
  include:
    - rvm: 2.1
      before_install:
        - gem install bundler -v '< 2.0'
    - rvm: 2.2
      before_install:
        - gem install bundler -v '< 2.0'
  allow_failures:
    - rvm: ruby-head
    - rvm: jruby-9.1.5.0

before_install:
  - gem update --system
  - gem install bundler