Add Subscription properties test

test/subscription_test.dart

@@ -225,4 +225,33 @@ Future<void> main([List<String>? args]) async {
 
     await subscriptions.waitForSynchronization();
   });
+
+  testSubscriptions('Subscription properties roundtrip', (realm) async {
+    final subscriptions = realm.subscriptions;
+
+    final before = DateTime.now().toUtc();
+
+    subscriptions.update((mutableSubscriptions) {
+      mutableSubscriptions.addOrUpdate(realm.all<Task>(), name: 'foobar');
+    });
+
+    await subscriptions.waitForStateChange(SubscriptionSetState.complete); // <-- Attempt at fixing windows
+
+    final after = DateTime.now().toUtc();
+    var s = subscriptions[0];
+
+    expect(s.name, 'foobar');
+    expect(s.objectClassName, 'Task');
+    expect(s.queryString, 'TRUEPREDICATE');
+    expect(s.createdAt.compareTo(before), isPositive); // >
+    expect(s.createdAt.compareTo(after), isNegative); // <
+    expect(s.createdAt, s.updatedAt);
+
+    subscriptions.update((mutableSubscriptions) {
+      mutableSubscriptions.addOrUpdate(realm.query<Task>(r'_id == $0', [ObjectId()]), name: 'foobar');
+    });
+
+    s = subscriptions[0]; // WARNING: Needed in order to refresh properties! 
+    expect(s.createdAt.compareTo(s.updatedAt), isNegative); // <
+  });
 }