[workflow-plugin] How to use Xvnc to run a step

[Reginaldo Russinholi]

Hi all,

I'm new with workflow-plugin and I'm trying to run some webdriver tests, but I'm not able to make Xvnc work.

I tryied to use this code generate by Snippet Generator, to use XvfbInstallation:
 

tool name: 'default', type: 'org.jenkinsci.plugins.xvfb.XvfbInstallation'

and also including the following code to run:

wrap([$class: 'Xvnc', useXauthority: true]) {
    // here $DISPLAY is set to :11 or similar, and $XAUTHORITY too
    sh 'make selenium-tests' // or whatever
  }

All I've got is: 
java.io.IOException: Cannot run program "vncserver" (in directory "/home/ubuntu/workspace/workflow-CIT996"): error=2, No such file or directory

I printed the return of "tool name: 'default', type: 'org.jenkinsci.plugins.xvfb.XvfbInstallation'"and it was blank. (I have Xvfb installation configured on Jenkins)

If someone can help me, will be welcome.