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-rw-r--r--js/src/jit-test/tests/proxy/testDirectProxyKeys10.js23
1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/proxy/testDirectProxyKeys10.js b/js/src/jit-test/tests/proxy/testDirectProxyKeys10.js
new file mode 100644
index 0000000000..47a4360aac
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyKeys10.js
@@ -0,0 +1,23 @@
+load(libdir + "asserts.js");
+
+// Allow [[GetOwnPropertyDescriptor]] to spoof enumerability of target object's
+// properties. Note that this also tests that the getOwnPropertyDescriptor is
+// called by Object.keys(), as expected.
+
+var target = {};
+var handler = {
+ getOwnPropertyDescriptor : function (target, P) {
+ var targetDesc = Object.getOwnPropertyDescriptor(target, P);
+ // Lie about enumerability
+ targetDesc.enumerable = !targetDesc.enumerable;
+ return targetDesc;
+ }
+};
+
+for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy]) {
+ Object.defineProperty(target, "foo", { configurable: true, enumerable: false });
+ assertDeepEq(Object.keys(p), ["foo"]);
+
+ Object.defineProperty(target, "foo", {configurable: true, enumerable: true});
+ assertDeepEq(Object.keys(p), []);
+}