Add a dummy test for Dart package

packages/dart/test/breez_liquid_dart_test.dart

@@ -1,3 +1,4 @@
+import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated.dart';
 import 'package:test/test.dart';
 
 import 'helpers.dart';
@@ -7,5 +8,18 @@ void main() {
     setUpAll(() async {
       await initApi();
     });
+
+    test(
+        "after setting up, getInfo should throw exception with 'Not initialized' message",
+        () async {
+      GetInfoRequest req = GetInfoRequest(withScan: true);
+      try {
+        await getInfo(req: req);
+      } catch (e) {
+        if (e is AnyhowException) {
+          expect(e.message, "Not initialized");
+        }
+      }
+    });
   });
 }