url = ".-*_:/+%=&?#[]@~!$'(),;";
        result = ".-*_:/+%=&?#[]@~!$'(),;";
        assertEquals(result, htmlTransformer.encodeUrl(url, "UTF-8"));
    }

    public void test_isSupportedCharset_valid() {
        assertTrue(htmlTransformer.isSupportedCharset("UTF-8"));
        assertTrue(htmlTransformer.isSupportedCharset("EUC-JP"));
        assertTrue(htmlTransformer.isSupportedCharset("Shift_JIS"));
    }