1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/change-array-by-copy.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/change-array-by-copy.js
new file mode 100644
index 0000000000..f7dfc87b02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/change-array-by-copy.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype-@@unscopables
+description: >
+    Initial value of `Symbol.unscopables` property
+info: |
+    22.1.3.32 Array.prototype [ @@unscopables ]
+
+    ...
+    12. Perform ! CreateDataPropertyOrThrow(unscopableList, "toReversed", true).
+    13. Perform ! CreateDataPropertyOrThrow(unscopableList, "toSorted", true).
+    14. Perform ! CreateDataPropertyOrThrow(unscopableList, "toSpliced", true).
+    ...
+includes: [propertyHelper.js]
+features: [Symbol.unscopables, change-array-by-copy]
+---*/
+
+var unscopables = Array.prototype[Symbol.unscopables];
+
+for (const unscopable of ["toReversed", "toSorted", "toSpliced"]) {
+    verifyProperty(unscopables, unscopable, {
+        value: true,
+        writable: true,
+        configurable: true
+    })
+};
+
+assert(!Object.prototype.hasOwnProperty.call(unscopables, "with"), "does not have `with`");
+
+reportCompare(0, 0);