1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/non262/Proxy/proxy-for-in.js b/js/src/tests/non262/Proxy/proxy-for-in.js
new file mode 100644
index 0000000000..4332bfbbad
--- /dev/null
+++ b/js/src/tests/non262/Proxy/proxy-for-in.js
@@ -0,0 +1,37 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+"use strict";
+
+let steps = [];
+
+const object = {
+    __proto__: {
+        "xyz": 42
+    }
+};
+const proxy = new Proxy(object, {
+    ownKeys(target) {
+        steps.push("ownKeys")
+        return ["a", "b"];
+    },
+
+    getOwnPropertyDescriptor(target, property) {
+        steps.push("getOwn-" + property);
+        return {
+            value: undefined,
+            configurable: true,
+            writable: true,
+            enumerable: (property === "a")
+        };
+    }
+});
+
+let iterated = [];
+for (let x in proxy)
+    iterated.push(x);
+
+assertEq(iterated.toString(), "a,xyz");
+assertEq(steps.toString(), "ownKeys,getOwn-a,getOwn-b");
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);