jenkins kubernetes workflow testing

workflow.groovy

node('kubernetes') {
       kubernetes.pod('mypod').withImage('maven').inside {      
              git 'https://github.com/fabric8io-images/s2i.git'
              kubernetes.image().withName("my-java-s2i").build().fromPath("java")
              kubernetes.image().withName("my-java-s2i").tag().inRepository("my-java-s2i").withTag("1.0")
              kubernetes.image().withName("my-java-s2i").push().withTag("1.0").toRegistry()
       }
}