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

    @Test
    public void test_getHost_ok() {
        String url, exp;
        final FessFileTransformer transformer = createInstance();

        url = "";
        exp = "";
        assertEquals(exp, transformer.getHostOnFile(url));

    List<Object> tentativeArgs = new ArrayList<>(args);
    tentativeArgs.set(i, alternateArg);
    return createInstance(factory, tentativeArgs).hashCode()
        == createInstance(factory, args).hashCode();
  }

  // distinctValues is a type-safe class-values mapping, but we don't have a type-safe data
  // structure to hold the mappings.

    List<Object> tentativeArgs = new ArrayList<>(args);
    tentativeArgs.set(i, alternateArg);
    return createInstance(factory, tentativeArgs).hashCode()
        == createInstance(factory, args).hashCode();
  }

  // distinctValues is a type-safe class-values mapping, but we don't have a type-safe data
  // structure to hold the mappings.