using Docker for testing

[rijnhard]

This is just a bit of an FYI:

When testing i used a docker container:

docker-compose.yml (in root directory)

version: '2'

# this is for testing only
services:
    logstash-patterns-core:
        # https://hub.docker.com/_/jruby/
        image: jruby:9-onbuild
        command: ["bundle", "exec", "rspec"]

but you could do the same in a single docker line

docker run -ti --rm jruby:9-onbuild bundle exec rspec

the jruby:9-onbuild onbuild container uses the current directory of where its built to look for a Gemfile.lock