Gitlab CI to test Rails app

.gitlab-ci.yml

image: rails

services:
  - redis
  - $DB

cache:
  key: bundle
  paths:
    - vendor/bundle

variables:
  POSTGRES_DB: center_test
  POSTGRES_USER: runner
  POSTGRES_PASSWORD: ""
  MYSQL_DATABASE: center_test
  MYSQL_ROOT_PASSWORD: root

before_script:
  - cp config/database.ci-$DB.yml config/database.yml
  - cp .ci.env .env
  - bundle install --jobs $(nproc) --path=vendor/bundle

.test: &test_template
  script:
    - bundle exec rake db:create RAILS_ENV=test
    - RAILS_ENV=test bundle exec rake db:reset
    - bundle exec rake test

test_pg:
  <<: *test_template
  variables:
    DB: postgres

test_mysql:
  <<: *test_template
  variables:
    DB: mysql