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+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-object.keys
+description: >
+ Property names are returned in ascending chronological order of creation
+ that is unaffected by [[DefineOwnProperty]].
+info: |
+ Object.keys ( O )
+
+ [...]
+ 2. Let nameList be ? EnumerableOwnPropertyNames(obj, key).
+ 3. Return CreateArrayFromList(nameList).
+
+ EnumerableOwnPropertyNames ( O, kind )
+
+ [...]
+ 2. Let ownKeys be ? O.[[OwnPropertyKeys]]().
+ [...]
+
+ OrdinaryOwnPropertyKeys ( O )
+
+ [...]
+ 3. For each own property key P of O that is a String but is not an array index,
+ in ascending chronological order of property creation, do
+ a. Add P as the last element of keys.
+ [...]
+ 5. Return keys.
+includes: [compareArray.js]
+---*/
+
+var obj = {};
+Object.defineProperty(obj, "a", {
+ get: function() {},
+ set: function(_value) {},
+ enumerable: true,
+ configurable: true,
+});
+obj.b = 2;
+Object.defineProperty(obj, "a", {value: 1});
+assert.compareArray(Object.keys(obj), ["a", "b"]);
+
+reportCompare(0, 0);