CurlRequest result = request.encoding(encoding);

        assertSame(request, result); // Fluent API
        assertEquals(encoding, request.encoding());
    }

    @Test
    public void testEncodingAfterParamThrowsException() {
        CurlRequest request = new CurlRequest(Method.GET, "https://example.com");
        request.param("key", "value");

        try {
            request.encoding("ISO-8859-1");