Map<Object, Object> choices = new LinkedHashMap<Object, Object>();
choices.put("J", "John");
choices.put("P", "Paul");
choices.put("G", "George");
choices.put("R", "Ringo");
Widget w = new RadioWidget(choices);
String out = w.render("beatle", new String[] {"J"}, null);
String correct = "<ul>\n" +
"<li><label><input name=\"beatle\" type=\"radio\" value=\"J\" checked=\"checked\" /> John</label></li>\n" +
"<li><label><input name=\"beatle\" type=\"radio\" value=\"P\" /> Paul</label></li>\n" +
"<li><label><input name=\"beatle\" type=\"radio\" value=\"G\" /> George</label></li>\n" +