Hi,
Actually it's not possible to use jsfclient.setValue(inputId, value) to set value in inputNumberSlider because this input has no id. while waiting for https://issues.jboss.org/browse/RF-11817), this code works to test it.
Adrien
{code}
HtmlPage page = (HtmlPage) client.getContentPage();
HtmlForm form = page.getFormByName("formid");
HtmlInput sliderInput = form.getInputByName("sliderid");
sliderInput.setValueAttribute("55");
{code}