Add m-esr52 at 52.6.0

1 files changed, 35 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/proxy/testDirectProxyKeys9.js b/js/src/jit-test/tests/proxy/testDirectProxyKeys9.js
new file mode 100644
index 000000000..92695cdcd
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyKeys9.js
@@ -0,0 +1,35 @@
+// Cull non-existent names returned by the trap.
+var nullProtoAB = Object.create(null, {
+    a: {
+        enumerable: true,
+        configurable: true
+    },
+    b: {
+        enumerable: false,
+        configurable: true
+    }
+});
+var protoABWithCD = Object.create(nullProtoAB, {
+    c: {
+        enumerable: true,
+        configurable: true
+    },
+    d: {
+        enumerable: false,
+        configurable: true
+    }
+});
+
+var returnedNames;
+var handler = { ownKeys: () => returnedNames };
+
+for (let p of [new Proxy(protoABWithCD, handler), Proxy.revocable(protoABWithCD, handler).proxy]) {
+    returnedNames = [ 'e' ];
+    var names = Object.keys(p);
+    assertEq(names.length, 0);
+
+    returnedNames = [ 'c' ];
+    names = Object.keys(p);
+    assertEq(names.length, 1);
+    assertEq(names[0], 'c');
+}