Jenkins Pipeline Unit testing shared library

agent.jenkins

#!/usr/bin/env groovy

import com.lesfurets.jenkins.unit.global.lib.Library

@Library("example.common@master")
import com.example.jenkins.agents.DeploymentAgent

def execute(){

    node() {

        DeploymentAgent agent = new DeploymentAgent()
        //println new DeploymentAgent().metaClass.methods*.name.sort().unique()
    
        stage("Setup"){
            agent.example()
        }

    }

}

return this

DeploymentAgent.groovy

package com.example.jenkins.agents

void example(){
      echo "example running" 
}

return this

TestDeploymentAgent.groovy

import static com.lesfurets.jenkins.unit.global.lib.LibraryConfiguration.library
import static com.lesfurets.jenkins.unit.global.lib.LocalSource.localSource

import com.lesfurets.jenkins.unit.BaseRegressionTest
import com.lesfurets.jenkins.unit.BasePipelineTest

import org.junit.Before
import org.junit.Test


class TestDeploymentAgent extends BaseRegressionTest {

    @Override
    @Before
    void setUp() throws Exception{

        helper.scriptRoots += 'src'
        helper.scriptRoots += 'vars'
        helper.scriptRoots += 'test'
        helper.scriptRoots += 'jobs'
        callStackPath = 'test/resources/callstacks/'

        String sharedLibs = this.class.getResource('./').getFile()

        def library = library()
                .name('example.common')
                .allowOverride(false)
                .retriever(localSource(sharedLibs))
                .targetPath(sharedLibs)
                .defaultVersion("master")
                .implicit(false)
                .build()
        helper.registerSharedLibrary(library)
        super.setUp()        

    }

    @Test
    void should_execute_without_errors() throws Exception {
      
        Script script = loadScript("jobs/agent.jenkins")
        script.execute()
        printCallStack()
        assertJobStatusSuccess()
      
    }

}