Add m-esr52 at 52.6.0

1 files changed, 13 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/proxy/testDirectProxyHas6.js b/js/src/jit-test/tests/proxy/testDirectProxyHas6.js
new file mode 100644
index 000000000..179e40f86
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyHas6.js
@@ -0,0 +1,13 @@
+/*
+ * Don't throw a type error if the trap reports an undefined property as
+ * non-present, regardless of extensibility.
+ */
+var target = {};
+Object.preventExtensions(target);
+
+var handler = { has: () => false };
+
+for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy]) {
+    assertEq('foo' in p, false);
+    assertEq(Symbol.iterator in p, false);
+}