1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/proxy/testDirectProxySetArray4.js b/js/src/jit-test/tests/proxy/testDirectProxySetArray4.js
new file mode 100644
index 0000000000..524ddca456
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxySetArray4.js
@@ -0,0 +1,24 @@
+// Assigning to an existing array element via a proxy with no set handler
+// calls the defineProperty handler.
+
+function test(arr) {
+    var p = new Proxy(arr, {
+        defineProperty(t, id, desc) {
+            hits++;
+
+            // ES6 draft rev 28 (2014 Oct 14) 9.1.9 step 5.e.i.
+            // Since the property already exists, the system only changes
+            // the value. desc is otherwise empty.
+            assertEq(Object.getOwnPropertyNames(desc).join(","), "value");
+            assertEq(desc.value, "ponies");
+            return true;
+        }
+    });
+    var hits = 0;
+    p[0] = "ponies";
+    assertEq(hits, 1);
+    assertEq(arr[0], 123);
+}
+
+test([123]);
+test(new Int32Array([123]));