String unicodeBody = "{\"message\":\"こんにちは世界\"}";
        request.body(unicodeBody);

        assertEquals(unicodeBody, request.body());
    }

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

        // Param with unicode characters
        request.param("message", "こんにちは");

        assertNotNull(request);