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-rw-r--r--js/src/tests/non262/object/seal-proxy.js27
1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/non262/object/seal-proxy.js b/js/src/tests/non262/object/seal-proxy.js
new file mode 100644
index 0000000000..44bb685c87
--- /dev/null
+++ b/js/src/tests/non262/object/seal-proxy.js
@@ -0,0 +1,27 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function logProxy(object = {}, handler = {}) {
+ var log = [];
+ var proxy = new Proxy(object, new Proxy(handler, {
+ get(target, propertyKey, receiver) {
+ log.push(propertyKey);
+ return target[propertyKey];
+ }
+ }));
+ return {proxy, log};
+}
+
+// The order of operations is backwards when compared to ES6 draft rev 27
+// (2014 August 24), but see https://bugs.ecmascript.org/show_bug.cgi?id=3215
+// for an explanation on why the spec version is clearly wrong.
+
+var {proxy, log} = logProxy();
+Object.seal(proxy);
+assertDeepEq(log, ["preventExtensions", "ownKeys"]);
+
+var {proxy, log} = logProxy();
+Object.seal(Object.seal(proxy));
+assertDeepEq(log, ["preventExtensions", "ownKeys", "preventExtensions", "ownKeys"]);
+
+reportCompare(0, 0);