assertFalse(transformer.isValidUrl("http://"));
        assertFalse(transformer.isValidUrl("http://http://www.example.com"));
    }

    @Test
    public void test_processFieldConfigs() {
        final FessXpathTransformer transformer = new FessXpathTransformer();
        final Map<String, String> params = Maps.of("foo", "cache", "bar", "overwrite", "baz", "cache|overwrite");