} catch (CurlException e) {
            assertTrue(e.getMessage().contains("Invalid encoding"));
        }
    }

    @Test
    public void testFluentChaining() {
        String url = "https://example.com";
        CurlRequest request = new CurlRequest(Method.POST, url).encoding("UTF-8").threshold(2048).gzip().param("param1", "value1")