An example of wercker.yml for test of app built with perl with carton and mysql.

wercker.yml

# Docker container for whole process
box: ubuntu

# Additional services
services:
  - id: mysql
    env:
        MYSQL_ROOT_PASSWORD: test
        MYSQL_USER: test
        MYSQL_PASSWORD: test
        MYSQL_DATABASE: test_db

# Process of build
build:
    steps:
        # Install packages - http://devcenter.wercker.com/docs/steps/install-packages.html
        - install-packages:
            packages: build-essential make g++ libexpat1-dev libssl-dev libmysqlclient-dev
        # Carton - https://github.com/moltar/wercker-step-carton-install
        - moltar/carton-install:
            cache_local: true
            without: develop
        # Run tests
        - script:
            name: Run test cases
            code: |
                export MOJO_MODE=test
                carton exec -- prove -lvr t/