node {
    def commit_id
    stage('Preparation') {
        checkout scm
        commit_id = sh(returnStdout: true, script: "git log -n 1 --pretty=format:'%h'").trim()
    }
    stage('Test NPM') {
        docker.image('node:8').inside {
            sh 'npm install --only=dev'
            sh 'npm test'
        }
    }
    stage('Test with a DB') {
        docker.image('mysql:8-oracle').withRun('-e MYSQL_ALLOW_EMPTY_PASSWORD=yes --rm') { mdb ->
			docker.image('mysql:8-oracle').inside("--link ${mdb.id}:db") {
				/* Wait until mysql service is up */
				sh 'while ! mysqladmin ping -hdb --silent; do sleep 1; done'
			}
			docker.image('node:8').inside("--link ${mdb.id}:mysql") {
				/*
				 * Run some tests which require MySQL, and assume that it is
				 * available on the host name `db`
				 */
                sh 'npm install --only=dev'
                sh 'npm test'
			}
		}
    }
}