Add m-esr52 at 52.6.0

1 files changed, 16 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/proxy/testDirectProxyDefineProperty3.js b/js/src/jit-test/tests/proxy/testDirectProxyDefineProperty3.js
new file mode 100644
index 000000000..8a466aded
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyDefineProperty3.js
@@ -0,0 +1,16 @@
+load(libdir + "asserts.js");
+
+/*
+ * Throw a TypeError if the trap defines a new property on a non-extensible
+ * object
+ */
+var target = {};
+Object.preventExtensions(target);
+
+var handler = { defineProperty: function (target, name, desc) { return true; } };
+
+for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy]) {
+    assertThrowsInstanceOf(function () {
+        Object.defineProperty(p, 'foo', { configurable: true });
+    }, TypeError);
+}