Adding TDD on rails + docker

docker-compose-test.yml

version: '2'
services:
  webtest:
    build:
      context: .
      dockerfile: doc/docker-conf/web/Dockerfile-test
    volumes:
      - .:/usr/src/app
    command: bash -c "bundle check || bundle install; rm -f /usr/src/app/tmp/pids/server.pid ; rails s -p 3000 -b 0.0.0.0"
    environment:
      - RACK_ENV=test
      - RAILS_ENV=test
      - REDIS_HOST=redis
      - REDIS_PORT=6379
    links:
      - redis_db:redis
    ports:
      - '8082:3000'
    expose:
      - "8082"
  redis_db:
    image: 'redis:3.2.3-alpine'
    command: redis-server
  workertest:
    build:
      context: .
      dockerfile: doc/docker-conf/sidekiq/Dockerfile-test
    volumes:
      - .:/usr/src/sidekiq
    command: bash -c "bundle check || bundle install; rm -f /usr/src/app/tmp/pids/sidekiq.pid; bundle exec sidekiq"
    links:
      - redis_db:redis
    environment:
      - [email protected]
      - RACK_ENV=test
      - RAILS_ENV=test
      - REDIS_HOST=redis
      - REDIS_PORT=6379

Later execute:
docker-compose -f docker-compose-test.yml exec workertest bundle exec guard