url = "tp://hoge.com/http/fuga.html";
        assertEquals("tp://hoge.com/http/fuga.html", urlConvertHelper.convert(url));

        urlConvertHelper.add("^tp:", "http:");

        url = "http://hoge.com/http/fuga.html";
        assertEquals("http://hoge.com/http/fuga.html", urlConvertHelper.convert(url));

        url = "tp://hoge.com/http/fuga.html";