1 files changed, 64 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/getOwnPropertyDescriptor/trap-is-null-target-is-proxy.js b/js/src/tests/test262/built-ins/Proxy/getOwnPropertyDescriptor/trap-is-null-target-is-proxy.js
new file mode 100644
index 0000000000..3e4d33c74e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Proxy/getOwnPropertyDescriptor/trap-is-null-target-is-proxy.js
@@ -0,0 +1,64 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-proxy-object-internal-methods-and-internal-slots-getownproperty-p
+description: >
+  If "getOwnPropertyDescriptor" trap is null or undefined, [[GetOwnProperty]]
+  call is properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
+info: |
+  [[GetOwnProperty]] ( P )
+
+  [...]
+  5. Let target be O.[[ProxyTarget]].
+  6. Let trap be ? GetMethod(handler, "getOwnPropertyDescriptor").
+  7. If trap is undefined, then
+    a. Return ? target.[[GetOwnProperty]](P).
+includes: [propertyHelper.js]
+features: [Proxy]
+---*/
+
+var plainObjectTarget = new Proxy({foo: 1}, {});
+var plainObjectProxy = new Proxy(plainObjectTarget, {
+  getOwnPropertyDescriptor: null,
+});
+
+verifyProperty(plainObjectProxy, "bar", undefined);
+verifyProperty(plainObjectProxy, "foo", {
+  value: 1,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+
+var fooDescriptor = {
+  get: function() {},
+  set: function(_value) {},
+  enumerable: false,
+  configurable: true,
+};
+
+var target = new Proxy({}, {
+  getOwnPropertyDescriptor: function(_target, key) {
+    if (key === "foo") {
+      return fooDescriptor;
+    }
+  },
+  deleteProperty: function(_target, key) {
+    if (key === "foo") {
+      fooDescriptor = undefined;
+    }
+
+    return true;
+  },
+});
+
+var proxy = new Proxy(target, {
+  getOwnPropertyDescriptor: null,
+});
+
+verifyProperty(proxy, "bar", undefined);
+verifyProperty(proxy, "foo", fooDescriptor);
+
+reportCompare(0, 0);