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-rw-r--r--js/src/tests/test262/built-ins/Proxy/ownKeys/trap-is-undefined-target-is-proxy.js42
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diff --git a/js/src/tests/test262/built-ins/Proxy/ownKeys/trap-is-undefined-target-is-proxy.js b/js/src/tests/test262/built-ins/Proxy/ownKeys/trap-is-undefined-target-is-proxy.js
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+++ b/js/src/tests/test262/built-ins/Proxy/ownKeys/trap-is-undefined-target-is-proxy.js
@@ -0,0 +1,42 @@
+// 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-ownpropertykeys
+description: >
+ If "ownKeys" trap is null or undefined, [[OwnPropertyKeys]] call is
+ properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
+info: |
+ [[OwnPropertyKeys]] ( )
+
+ [...]
+ 4. Let target be O.[[ProxyTarget]].
+ 5. Let trap be ? GetMethod(handler, "ownKeys").
+ 6. If trap is undefined, then
+ a. Return ? target.[[OwnPropertyKeys]]().
+
+ [[OwnPropertyKeys]] ( )
+
+ [...]
+ 7. Let trapResultArray be ? Call(trap, handler, « target »).
+ 8. Let trapResult be ? CreateListFromArrayLike(trapResultArray, « String, Symbol »).
+ [...]
+ 23. Return trapResult.
+includes: [compareArray.js]
+features: [Symbol, Proxy, Reflect]
+---*/
+
+var trapResult = [Symbol(), "length", "foo", "0"];
+var target = new Proxy([], {
+ ownKeys: function(_target) {
+ return trapResult;
+ },
+});
+
+var proxy = new Proxy(target, {
+ ownKeys: undefined,
+});
+
+assert.compareArray(Reflect.ownKeys(proxy), trapResult);
+
+reportCompare(0, 0);