dockerize mocha tests that depend on services

docker-compose.yml

version: '2'
services:
  test:
    image: node:latest
    working_dir: /app
    volumes:
      - .:/app
    command:
      npm run mocha
    links:
      - redis
      - mysql
  redis:
    image: redis
  mysql:
    image: mysql
    environment:
        MYSQL_ALLOW_EMPTY_PASSWORD: "yes"

package.json

{
  "scripts": {
    "test": "docker-compose up test",
    "posttest": "docker-compose stop redis mysql",
    "mocha": "mocha --reporter spec ./test.js"
  },
  "devDependencies": {
    "mocha": "^3.1.0"
  },
  "dependencies": {
    "ioredis": "^2.4.0",
    "mysql": "^2.11.1"
  }
}

test.js

var Redis = require('ioredis')
var mysql = require('mysql')

describe('dockerize mocha tests that depend on services', function () {
  it('should connect to redis', function () {
    var client = new Redis(6379, 'redis', { lazyConnect: true })
    return client.connect()
  })

  it('should connect to mysql', function (done) {
    mysql.createConnection({
      host: 'mysql',
      user: 'root'
    }).connect(done)
  })
})