jenkins pipeline slack

node {
    stage 'Cucumber Reports'
 
    // process cucumber reports
    step([$class: 'CucumberReportPublisher', jsonReportDirectory: 'target/', fileIncludePattern: '*.json'])

    // send report to slack
    cucumberSendSlack: channel: 'test-results-channel', json: 'target/test-results.json' 
}

https://wiki.jenkins-ci.org/display/JENKINS/Cucumber+Slack+Notifier+Plugin