String sourceContent = new String(in.readAllBytes(), "UTF-8");
            assertEquals(content, sourceContent, "Source content should remain unchanged");
        }

        try (InputStream in = targetFile.getInputStream()) {
            String targetContent = new String(in.readAllBytes(), "UTF-8");
            assertEquals(content, targetContent, "Target content should match source");

            resultData.setTransformerName(name);
            // Apply transformation rules
            try (InputStream is = responseData.getResponseBody()) {
                byte[] bytes = is.readAllBytes();
                String content = new String(bytes);
                for (Map.Entry<String, String> rule : transformationRules.entrySet()) {
                    content = content.replaceAll(rule.getKey(), rule.getValue());