Replace more instances with `get_or_undefined`

boa/src/builtins/object/mod.rs

@@ -696,7 +696,7 @@ impl Object {
     /// [spec]: https://tc39.es/ecma262/#sec-object.seal
     /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/seal
     pub fn seal(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
-        let o = args.get(0).cloned().unwrap_or_default();
+        let o = args.get_or_undefined(0);
 
         if let Some(o) = o.as_object() {
             // 2. Let status be ? SetIntegrityLevel(O, sealed).
@@ -708,7 +708,7 @@ impl Object {
         }
         // 1. If Type(O) is not Object, return O.
         // 4. Return O.
-        Ok(o)
+        Ok(o.clone())
     }
 
     /// `Object.isSealed( target )`
@@ -720,7 +720,7 @@ impl Object {
     /// [spec]: https://tc39.es/ecma262/#sec-object.issealed
     /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isSealed
     pub fn is_sealed(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
-        let o = args.get(0).cloned().unwrap_or_default();
+        let o = args.get_or_undefined(0);
 
         // 1. If Type(O) is not Object, return true.
         // 2. Return ? TestIntegrityLevel(O, sealed).
@@ -741,7 +741,7 @@ impl Object {
     /// [spec]: https://tc39.es/ecma262/#sec-object.freeze
     /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze
     pub fn freeze(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
-        let o = args.get(0).cloned().unwrap_or_default();
+        let o = args.get_or_undefined(0);
 
         if let Some(o) = o.as_object() {
             // 2. Let status be ? SetIntegrityLevel(O, frozen).
@@ -753,7 +753,7 @@ impl Object {
         }
         // 1. If Type(O) is not Object, return O.
         // 4. Return O.
-        Ok(o)
+        Ok(o.clone())
     }
 
     /// `Object.isFrozen( target )`
@@ -765,7 +765,7 @@ impl Object {
     /// [spec]: https://tc39.es/ecma262/#sec-object.isfrozen
     /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/isFrozen
     pub fn is_frozen(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
-        let o = args.get(0).cloned().unwrap_or_default();
+        let o = args.get_or_undefined(0);
 
         // 1. If Type(O) is not Object, return true.
         // 2. Return ? TestIntegrityLevel(O, frozen).
@@ -790,7 +790,7 @@ impl Object {
         args: &[JsValue],
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let o = args.get(0).cloned().unwrap_or_default();
+        let o = args.get_or_undefined(0);
 
         if let Some(o) = o.as_object() {
             // 2. Let status be ? O.[[PreventExtensions]]().
@@ -802,7 +802,7 @@ impl Object {
         }
         // 1. If Type(O) is not Object, return O.
         // 4. Return O.
-        Ok(o)
+        Ok(o.clone())
     }
 
     /// `Object.isExtensible( target )`
@@ -818,7 +818,7 @@ impl Object {
         args: &[JsValue],
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let o = args.get(0).cloned().unwrap_or_default();
+        let o = args.get_or_undefined(0);
         // 1. If Type(O) is not Object, return false.
         if let Some(o) = o.as_object() {
             // 2. Return ? IsExtensible(O).