1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/non262/Proxy/report-writable-as-non-writable.js b/js/src/tests/non262/Proxy/report-writable-as-non-writable.js
new file mode 100644
index 0000000000..c0facd1057
--- /dev/null
+++ b/js/src/tests/non262/Proxy/report-writable-as-non-writable.js
@@ -0,0 +1,20 @@
+"use strict";
+
+var target = {};
+Object.defineProperty(target, "test",
+    {configurable: false, writable: true, value: 1});
+
+var proxy = new Proxy(target, {
+    getOwnPropertyDescriptor(target, property) {
+        assertEq(property, "test");
+        return {configurable: false, writable: false, value: 1};
+    }
+});
+
+assertThrowsInstanceOf(() => Object.getOwnPropertyDescriptor(proxy, "test"),
+                       TypeError);
+
+assertThrowsInstanceOf(() => Reflect.getOwnPropertyDescriptor(proxy, "test"),
+                       TypeError);
+
+reportCompare(0, 0);