1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/non262/Tuple/prototype/isTuple/length.js b/js/src/tests/non262/Tuple/prototype/isTuple/length.js
new file mode 100644
index 0000000000..75acb7aedd
--- /dev/null
+++ b/js/src/tests/non262/Tuple/prototype/isTuple/length.js
@@ -0,0 +1,22 @@
+// |reftest| skip-if(!this.hasOwnProperty("Tuple"))
+var desc = Object.getOwnPropertyDescriptor(Tuple.isTuple, "length");
+assertEq(desc.value, 1);
+assertEq(desc.writable, false);
+assertEq(desc.enumerable, false);
+assertEq(desc.configurable, true);
+
+
+desc = Object.getOwnPropertyDescriptor(Tuple.isTuple, "name");
+assertEq(desc.value, "isTuple");
+assertEq(desc.writable, false);
+assertEq(desc.enumerable, false);
+assertEq(desc.configurable, true);
+
+assertEq(isConstructor(Tuple.isTuple), false);
+
+assertThrowsInstanceOf(() => {
+  let t = #[1];
+    new t.isTuple()();
+}, TypeError, '`let t = #[1]; new t.isTuple()` throws TypeError');
+
+reportCompare(0, 0);