Here are some example projects that use Jenkins Pipeline code in different ways and show off how to write unit tests for that code using jenkins-spock.
These example repositories work as much as possible, but their Jenkins pipelines and "deploy application" logic are made-up and won't actually run or deploy anything to anywhere.
Some of these example projects are actually run as integration tests during the build of jenkins-spock.
Check the fixup-integration-test-projects execution of the maven-invoker-plugin in the it Maven profile in the pom.xml to see which examples are used as integration tests.