public void toResourceName() throws Exception {
Control control = Control.getControl(Control.FORMAT_CLASS);
assert control.toResourceName("en", "US").equals("en.US");
control = Control.getControl(Control.FORMAT_PROPERTIES);
assert control.toResourceName("en", "US").equals("en.US");
control = Control.getControl(Control.FORMAT_DEFAULT);
assert control.toResourceName("en", "US").equals("en.US");
}