Add m-esr52 at 52.6.0

1 files changed, 12 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/proxy/testDirectProxyDefineProperty4.js b/js/src/jit-test/tests/proxy/testDirectProxyDefineProperty4.js
new file mode 100644
index 000000000..30e8d6316
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyDefineProperty4.js
@@ -0,0 +1,12 @@
+load(libdir + "asserts.js");
+
+/*
+ * Throw a TypeError if the trap defines a non-configurable property that does
+ * not exist on the target
+ */
+var handler = { defineProperty: function (target, name, desc) { return true; } };
+for (let p of [new Proxy({}, handler), Proxy.revocable({}, handler).proxy]) {
+    assertThrowsInstanceOf(function () {
+        Object.defineProperty(p, 'foo', { configurable: false });
+    }, TypeError);
+}