1 files changed, 11 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/arrow-functions/length.js b/js/src/jit-test/tests/arrow-functions/length.js
new file mode 100644
index 0000000000..53ca3e64df
--- /dev/null
+++ b/js/src/jit-test/tests/arrow-functions/length.js
@@ -0,0 +1,11 @@
+// Arrow functions have a .length property like ordinary functions.
+
+assertEq((a => a).hasOwnProperty("length"), true);
+
+assertEq((a => a).length, 1);
+assertEq((() => 0).length, 0);
+assertEq(((a) => 0).length, 1);
+assertEq(((a, b) => 0).length, 2);
+
+assertEq(((...arr) => arr).length, 0);
+assertEq(((a=1, b=2) => 0).length, 0);