WIP

tests/test_server.cpp

@@ -35,8 +35,11 @@ TEST_CASE("Echo test") {
 
   handler.done.wait();
   if (auto conn = handler.wconn.lock()) {
-    conn->append_message(std::exchange(handler.reply, {}),
-                         std::move(handler.arena));
+    // Cast to Connection* to access append_bytes (not available on
+    // MessageSender)
+    auto *conn_ptr = static_cast<Connection *>(conn.get());
+    conn_ptr->append_bytes(std::exchange(handler.reply, {}),
+                           std::move(handler.arena), false);
   } else {
     REQUIRE(false);
   }