add xcm size limit test

Author: ferrell-code

xtokens/src/tests.rs

@@ -428,10 +428,18 @@ fn send_as_sovereign_fails_if_bad_origin() {
 
 #[test]
 fn call_size_limit() {
+	// Ensures Call enum doesn't allocate more than 200 bytes in runtime
 	assert!(
 		core::mem::size_of::<crate::Call::<crate::tests::para::Runtime>>() <= 200,
 		"size of Call is more than 200 bytes: some calls have too big arguments, use Box to \
 		reduce the size of Call.
 		If the limit is too strong, maybe consider increasing the limit",
 	);
+
+	assert!(
+		core::mem::size_of::<orml_xcm::Call::<crate::tests::para::Runtime>>() <= 200,
+		"size of Call is more than 200 bytes: some calls have too big arguments, use Box to \
+		reduce the size of Call.
+		If the limit is too strong, maybe consider increasing the limit",
+	);
 }