docker-compose.ci.yml

---
# This is used to run the test suite within CI without requiring extra services.
#
## Usage:
#
# docker-compose -f docker-compose.ci.yml build test
# docker-compose -f docker-compose.ci.yml run --rm test
#
# Docker Compose 2.4 is for local development
# https://www.heroku.com/podcasts/codeish/57-discussing-docker-containers-and-kubernetes-with-a-docker-captain - Source on that.
version: '2.4'

x-ci-app: &ci-app
  image: rails-app:0.3.0
  mem_limit: 512m
  build:
    context: .
    dockerfile: Dockerfile
    target: development
  environment:
    DATABASE_URL: postgres://postgres:postgres@postgres:5432/
    RAILS_ENV: test
    RACK_ENV: test
    BUNDLE_PATH: /usr/src/app/vendor/bundle
  volumes:
    - .:/usr/src/app:cached

  depends_on:
    postgres:
      condition: service_healthy

services:
  postgres:
    image: postgres:12.3-alpine
    mem_limit: 64m
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
    restart: on-failure
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
    logging:
      driver: none

  test:
    <<: *ci-app
    command: bash -c "bin/setup && bundle exec rails db:test:load && bundle exec rake assets:precompile && bundle exec rspec"