Add ability to execute server side code from a client side UI test

gistfile1.txt

To be added to TestUtil:


    /**
     * Sometimes it's useful to execute some script on the server to get information back to the client side. We do
     * this by using the preview action on a temporary wiki page, passing the specified content.
     *
     * @param content the content to execute in a page
     * @return the result of the page execution with the page rendered in plain mode
     */
    public String executeContent(String content)
    {
        try {
            gotoPage("temporary", "temporary", "preview", "xpage=plain&outputSyntax=plain&content="
                + URLEncoder.encode(content, "UTF-8"));
        } catch (UnsupportedEncodingException e) {
            // That should not happen since UTF8 encoding should always be present!
            throw new RuntimeException(String.format("Failed to execute content [%s]", content), e);
        }
        return getDriver().findElement(By.tagName("body")).getText();
    }