ResponseData data = new ResponseData();

        data.setHttpStatusCode(200);
        assertEquals(200, data.getHttpStatusCode());

        data.setHttpStatusCode(404);
        assertEquals(404, data.getHttpStatusCode());

        data.setHttpStatusCode(500);
        assertEquals(500, data.getHttpStatusCode());
    }

    public void test_charSetGetterSetter() {
        // Test charset getter/setter

                                .param("q", "curl4j")
                                .header("Accept", "application/json")
                                .execute()) {
    System.out.println("Status: " + response.getHttpStatusCode());
    System.out.println(response.getContentAsString());
}
```

### Asynchronous request

```java
import org.codelibs.curl.Curl;

Curl.post("https://api.example.com/items")

        result.setHttpStatusCode(200);
        assertEquals(Integer.valueOf(200), result.getHttpStatusCode());

        result.setHttpStatusCode(404);
        assertEquals(Integer.valueOf(404), result.getHttpStatusCode());

        result.setHttpStatusCode(500);
        assertEquals(Integer.valueOf(500), result.getHttpStatusCode());
    }

    public void test_methodGetterSetter() {
        // Test method getter/setter

        processor.process(responseData);

        // Verify that ResponseData is unchanged
        assertEquals("https://example.com", responseData.getUrl());
        assertEquals(200, responseData.getHttpStatusCode());
    }

    public void test_processWithNullResponseData() {
        // Test process method with null ResponseData
        NullResponseProcessor processor = new NullResponseProcessor();

        if (!path.startsWith("/")) {
            path = "/" + path.replace('\\', '/');
        }
        final ResponseData responseData = fsClient.doGet("file:" + path);
        assertEquals(200, responseData.getHttpStatusCode());
        assertEquals("UTF-8", responseData.getCharSet());
        assertTrue(6 == responseData.getContentLength() || 7 == responseData.getContentLength());
        assertNotNull(responseData.getLastModified());

            ftpClient.setInitParameterMap(params);
            final ResponseData responseData = ftpClient.doGet("ftp://localhost:" + FTP_PORT + "/text1.txt");
            assertEquals(200, responseData.getHttpStatusCode());
            assertEquals("UTF-8", responseData.getCharSet());
            assertTrue(6 == responseData.getContentLength());
            assertNotNull(responseData.getLastModified());

        try {
            ResponseData result = client.doGet("storage://test/file.txt");
            assertNotNull("Response should not be null", result);
            assertEquals(200, result.getHttpStatusCode());
        } catch (Exception e) {
            fail("Should not throw exception: " + e.getMessage());
        }

        // Test without timeout (null accessTimeout)
        client.setAccessTimeout(null);

        try {
            ResponseData result = client.doGet("gcs://test/file.txt");
            assertNotNull("Response should not be null", result);
            assertEquals(200, result.getHttpStatusCode());
        } catch (Exception e) {
            fail("Should not throw exception: " + e.getMessage());
        }

        // Test without timeout (null accessTimeout)
        client.setAccessTimeout(null);

    public void testHttpStatusCode() {
        CurlResponse response = new CurlResponse();
        int statusCode = 200;

        response.setHttpStatusCode(statusCode);

        assertEquals(statusCode, response.getHttpStatusCode());
    }

    @Test
    public void testEncoding() {
        CurlResponse response = new CurlResponse();
        String encoding = "UTF-8";

        response.setEncoding(encoding);

        try {
            ResponseData result = client.doGet("s3://test/file.txt");
            assertNotNull("Response should not be null", result);
            assertEquals(200, result.getHttpStatusCode());
        } catch (Exception e) {
            fail("Should not throw exception: " + e.getMessage());
        }

        // Test without timeout (null accessTimeout)
        client.setAccessTimeout(null);