Reflect.ownKeys: order with large integer "index" keys

test/built-ins/Reflect/ownKeys/return-on-corresponding-order-large-index.js

+// Copyright (C) 2018 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-ordinaryownpropertykeys
+description: >
+  Returns keys in their corresponding order.
+info: |
+  26.1.11 Reflect.ownKeys ( target )
+
+  ...
+  2. Let keys be target.[[OwnPropertyKeys]]().
+  3. ReturnIfAbrupt(keys).
+  4. Return CreateArrayFromList(keys).
+
+  9.1.12 [[OwnPropertyKeys]] ( )
+
+  1. Let keys be a new empty List.
+  2. For each own property key P of O that is an integer index, in ascending
+  numeric index order
+    a. Add P as the last element of keys.
+  3. For each own property key P of O that is a String but is not an integer
+  index, in property creation order
+    a. Add P as the last element of keys.
+  4. For each own property key P of O that is a Symbol, in property creation
+  order
+    a. Add P as the last element of keys.
+  5. Return keys.
+features: [Reflect,Symbol]
+---*/
+
+var o1 = {
+  12345678900: true,
+  b: true,
+  1: true,
+  a: true,
+  [Number.MAX_SAFE_INTEGER]: true,
+  [Symbol.for('z')]: true,
+  12345678901: true,
+};
+
+var result = Reflect.ownKeys(o1);
+
+assert.sameValue(result.length, 7);
+assert.sameValue(result[0], '1');
+assert.sameValue(result[1], '12345678900');
+assert.sameValue(result[2], '12345678901');
+assert.sameValue(result[3], String(Number.MAX_SAFE_INTEGER));
+assert.sameValue(result[4], 'b');
+assert.sameValue(result[5], 'a');
+assert.sameValue(result[6], Symbol.for('z'));
+
+var o2 = {};
+
+o2[12345678900] = true;
+o2.b = true;
+o2[1] = true;
+o2.a = true;
+o2[Number.MAX_SAFE_INTEGER] = true;
+o2[Symbol.for('z')] = true;
+o2[12345678901] = true;
+
+
+result = Reflect.ownKeys(o2);
+
+assert.sameValue(result.length, 7);
+assert.sameValue(result[0], '1');
+assert.sameValue(result[1], '12345678900');
+assert.sameValue(result[2], '12345678901');
+assert.sameValue(result[3], String(Number.MAX_SAFE_INTEGER));
+assert.sameValue(result[4], 'b');
+assert.sameValue(result[5], 'a');
+assert.sameValue(result[6], Symbol.for('z'));