1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/non262/Array/indexOf-packed-array.js b/js/src/tests/non262/Array/indexOf-packed-array.js
new file mode 100644
index 0000000000..97c2da8855
--- /dev/null
+++ b/js/src/tests/non262/Array/indexOf-packed-array.js
@@ -0,0 +1,40 @@
+function makeArray(array) {
+    var log = [];
+    Object.setPrototypeOf(array, new Proxy(Array.prototype, new Proxy({
+        has(t, pk) {
+            log.push(`Has:${String(pk)}`);
+            return Reflect.has(t, pk);
+        },
+    }, {
+        get(t, pk, r) {
+            if (pk in t)
+                return Reflect.get(t, pk, r);
+            throw new Error(`Unexpected trap "${pk}" called`);
+        }
+    })));
+    return {array, log};
+}
+
+
+var {array, log} = makeArray([1, null, 3]);
+Array.prototype.indexOf.call(array, 100, {
+    valueOf() {
+        array.length = 0;
+        return 0;
+    }
+});
+assertEqArray(log, ["Has:0", "Has:1", "Has:2"]);
+
+
+var {array, log} = makeArray([5, undefined, 7]);
+Array.prototype.lastIndexOf.call(array, 100, {
+    valueOf() {
+        array.length = 0;
+        return 2;
+    }
+});
+assertEqArray(log, ["Has:2", "Has:1", "Has:0"]);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);