1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/non262/Symbol/well-known.js b/js/src/tests/non262/Symbol/well-known.js
new file mode 100644
index 0000000000..095d333a00
--- /dev/null
+++ b/js/src/tests/non262/Symbol/well-known.js
@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+var names = [
+    "isConcatSpreadable",
+    "iterator",
+    "match",
+    "replace",
+    "search",
+    "species",
+    "hasInstance",
+    "split",
+    "toPrimitive",
+    "unscopables",
+    "asyncIterator"
+];
+
+for (var name of names) {
+    // Well-known symbols exist.
+    assertEq(typeof Symbol[name], "symbol");
+
+    // They are never in the registry.
+    assertEq(Symbol[name] !== Symbol.for("Symbol." + name), true);
+
+    // They are shared across realms.
+    if (typeof Realm === 'function')
+        throw new Error("please update this test to use Realms");
+    if (typeof newGlobal === 'function') {
+        var g = newGlobal();
+        assertEq(Symbol[name], g.Symbol[name]);
+    }
+
+    // Descriptor is all false.
+    var desc = Object.getOwnPropertyDescriptor(Symbol, name);
+    assertEq(typeof desc.value, "symbol");
+    assertEq(desc.writable, false);
+    assertEq(desc.enumerable, false);
+    assertEq(desc.configurable, false);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);