1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/proxy/testDirectProxySetArray1.js b/js/src/jit-test/tests/proxy/testDirectProxySetArray1.js
new file mode 100644
index 0000000000..27d8489c4d
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxySetArray1.js
@@ -0,0 +1,25 @@
+// Assigning to a missing array element (a hole) via a proxy with no set handler
+// calls the defineProperty handler.
+
+function test(id) {
+    var arr = [, 1, 2, 3];
+    var p = new Proxy(arr, {
+        defineProperty(t, id, desc) {
+            hits++;
+            assertEq(desc.value, "ponies");
+            assertEq(desc.enumerable, true);
+            assertEq(desc.configurable, true);
+            assertEq(desc.writable, true);
+            return true;
+        }
+    });
+    var hits = 0;
+    p[id] = "ponies";
+    assertEq(hits, 1);
+    assertEq(id in arr, false);
+    assertEq(arr.length, 4);
+}
+
+test(0);
+test(4);
+test("str");