add (s, "Hello", false, true, false);
add (s, " world.", false, false, false);
BOOST_CHECK_EQUAL (marked_up (s, 1024, 1), "<span weight=\"bold\" size=\"41472\" alpha=\"65535\" color=\"#FFFFFF\">Hello</span><span size=\"41472\" alpha=\"65535\" color=\"#FFFFFF\"> world.</span>");
}
add (s, "Hello", false, true, false);
add (s, " world.", false, false, false);
BOOST_CHECK_EQUAL (marked_up (s, 1024, 1), "<span weight=\"bold\" size=\"41472\" alpha=\"65535\" color=\"#FFFFFF\">Hello</span><span size=\"41472\" alpha=\"65535\" color=\"#FFFFFF\"> world.</span>");
}