gistfile1.java

/*
The facelets code uses the id "state"

<p:selectOneMenu id="state" value="#{myBean.state}">
  ...
</p:selectOneMenu>

*/

// sample invocation to select element

    selectOne("myForm:state", "Disabled");

// select given option 
    public void selectOne(String idPrefix, String value) {
        if (StringUtils.isNotBlank(value)) {
            getDriver().findElement(By.id(idPrefix + "_label")).click();
            getDriver().findElement(By.xpath("//div[@id='" + idPrefix + "_panel']/div/ul/li[text()='" + value + "']")).click();
        }
    }