1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/getOwnPropertyDescriptor/trap-is-undefined-target-is-proxy.js b/js/src/tests/test262/built-ins/Proxy/getOwnPropertyDescriptor/trap-is-undefined-target-is-proxy.js
new file mode 100644
index 0000000000..38b797de3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Proxy/getOwnPropertyDescriptor/trap-is-undefined-target-is-proxy.js
@@ -0,0 +1,53 @@
+// 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 arrayTarget = new Proxy([42], {});
+var arrayProxy = new Proxy(arrayTarget, {
+  getOwnPropertyDescriptor: undefined,
+});
+
+verifyProperty(arrayProxy, "0", {
+  value: 42,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+verifyProperty(arrayProxy, "length", {
+  value: 1,
+  // writable: true,
+  enumerable: false,
+  configurable: false,
+});
+
+
+var regExpTarget = new Proxy(/(?:)/, {});
+var regExpProxy = new Proxy(regExpTarget, {
+  getOwnPropertyDescriptor: undefined,
+});
+
+verifyProperty(regExpProxy, "lastIndex", {
+  value: 0,
+  writable: true,
+  enumerable: false,
+  configurable: false,
+});
+
+reportCompare(0, 0);