this is error message :
submit(componentID) is only valid on components of type javax.faces.component.html.HtmlCommandButton. 'report' is of type org.jboss.seam.ui.component.html.HtmlButton.
JSFUnit doesn't support s:button yet, but it will very soon. If all goes well I'll put out a snapshot or beta release in 1-2 weeks. The difference is that we will use HtmlUnit instead of HttpUnit for backing the JSFClientSession. With that change, we will be able to support almost any component out there.