Add m-esr52 at 52.6.0

1 files changed, 12 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/proxy/testDirectProxyGetOwnPropertyDescriptor7.js b/js/src/jit-test/tests/proxy/testDirectProxyGetOwnPropertyDescriptor7.js
new file mode 100644
index 000000000..4f11bb733
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyGetOwnPropertyDescriptor7.js
@@ -0,0 +1,12 @@
+load(libdir + "asserts.js");
+
+/*
+ * Throw a TypeError if the trap reports a new own property on a non-extensible
+ * object
+ */
+var target = {};
+Object.preventExtensions(target);
+
+var handler = { getOwnPropertyDescriptor: () => ({}) };
+for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy])
+    assertThrowsInstanceOf(() => Object.getOwnPropertyDescriptor(p, 'foo'), TypeError);