url = "gcs://my-bucket/folder/document.pdf";
        exp = "document.pdf";
        assertEquals(exp, transformer.getFileName(url, Constants.UTF_8));
    }

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

    @Test
    public void test_getHost_ok() {