url = "ftp://example.com/test%E3%81%82.txt";
        exp = "test%E3%81%82.txt";
        assertEquals(exp, transformer.getFileName(url, Constants.UTF_8));
    }

    public void test_decodeUrl_null() throws Exception {
        final FessFileTransformer transformer = createInstance();
        assertNull(transformer.decodeUrlAsName(null, true));
    }

    public void test_getHost_ok() {