Builtin objects symbol properties should be lazy listed (#4271)

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

tests/jerry/es.next/map.js

@@ -157,3 +157,5 @@ map.forEach(function (value, key) {
 
 assert(k === Infinity);
 assert(map.get(+0) === "foo");
+
+[Symbol.iterator, Symbol.toStringTag].forEach(e => assert (Reflect.ownKeys(Map.prototype).includes(e)));

tests/jerry/es.next/set.js

@@ -136,3 +136,5 @@ set.forEach(function (value) {
 
 assert(k === Infinity);
 assert(set.has(+0) === true);
+
+[Symbol.iterator, Symbol.toStringTag].forEach(e => assert (Reflect.ownKeys(Set.prototype).includes(e)));

tests/jerry/es.next/weakmap.js

@@ -182,3 +182,5 @@ try {
 } catch (e) {
   assert (e === "abrupt set getter");
 }
+
+[Symbol.toStringTag].forEach(e => assert (Reflect.ownKeys(WeakMap.prototype).includes(e)));

tests/jerry/es.next/weakset.js

@@ -166,3 +166,5 @@ try {
 } catch (e) {
   assert (e === "abrupt add getter");
 }
+
+[Symbol.toStringTag].forEach(e => assert (Reflect.ownKeys(WeakSet.prototype).includes(e)));