}

            task unpackJar(type: Copy) {
                from zipTree(jar.archiveFile)
                into 'build/unzippedJar'
            }
        """
        file("src/main/java/Hello.java") << """public class Hello {}"""

        when:
        run 'unpackJar'

        then:
        executedAndNotSkipped ':jar', ':unpackJar'
    }