refactor(core, tests): encapsulate method and uri fields in Request

- Replaced direct field access with `setMethod` and `setUri` to improve encapsulation.
- Adjusted `RequestTest` to use setters for `method` and `uri`.

Author: predic8

core/src/main/java/com/predic8/membrane/core/http/Request.java

@@ -47,8 +47,8 @@ public class Request extends Message {
 
     private static final HashSet<String> methodsWithoutBody = Sets.newHashSet(METHOD_GET, METHOD_HEAD, METHOD_CONNECT);
 
-    String method;
-    String uri;
+    private String method;
+    private String uri;
 
     @Override
     protected void parseStartLine(InputStream in) throws IOException {
@@ -306,6 +306,12 @@ public Builder post(URIFactory uriFactory, String url) throws URISyntaxException
             return method(Request.METHOD_POST).url(uriFactory, url);
         }
 
+        /**
+         * For tests and special cases where URIs do not contain weird characters.
+         * @param url
+         * @return
+         * @throws URISyntaxException
+         */
         public Builder post(String url) throws URISyntaxException {
             return post(new URIFactory(), url);
         }

core/src/test/java/com/predic8/membrane/core/http/RequestTest.java

@@ -393,8 +393,8 @@ private AbstractBody readMessageAndGetBody() throws IOException, EndOfStreamExce
 
     public Request create(String method, String uri, String protocol, Header header, InputStream in) throws IOException {
         var r = new Request();
-        r.method = method;
-        r.uri = uri;
+        r.setMethod(method);
+        r.setUri(uri);
         if (!protocol.startsWith("HTTP/"))
             throw new RuntimeException("Unknown protocol '" + protocol + "'");
         r.version = protocol.substring(5);