Selenium in Sonar code coverage metrics

Goal

• Run Selenium GUI tests as part of the build on Jenkins.
• Collect code usage data to be able to report code coverage on Sonar.

Project Layout

• Cloudex-parent
• • Core module - services, daos
  • GUI module - for instance Wicket web GUI
  • Test module - Selenium integration tests

Configuration

There are two relevant parts of Maven config - parent POM which defines JaCoCo offline instrumentation and the test POM which covers deployment to embedded Tomcat and running.

parent pom

Test POM

Just few more points:

• The config module contains build folder with /lib folder with the configuration which needs to be in Tomcat.
• We need to include jacoco-agent.properties file in the /lib folder from the previous point. It should contain at least a single line: destfile=${sonar.jacoco.itReportPath} (see offline instrumentation).
• Selenium tests which should run are defined in the testng.xml.
• We have a dedicated database on external server which is migrated and against which runs the deployed application.
• The tests run in Firefox on a headless system (Jenkins master) thanks to Xvfb (X virtual frame buffer), so the Jenkins server must have Firefox and Xvfb installed.