1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/property-enumeration-order.js b/js/src/jit-test/tests/basic/property-enumeration-order.js
new file mode 100644
index 0000000000..2a891b4369
--- /dev/null
+++ b/js/src/jit-test/tests/basic/property-enumeration-order.js
@@ -0,0 +1,37 @@
+function check(obj, expected, expectedAll = expected) {
+    assertEq(Reflect.ownKeys(obj).join(""), expectedAll);
+    assertEq(Object.getOwnPropertyNames(obj).join(""), expectedAll);
+    assertEq(Object.keys(obj).join(""), expected);
+    var s = "";
+    for (var x in obj)
+	s += x;
+    assertEq(s, expected);
+}
+
+var obj = {2: 0, 0: 0, "foo": "bar", 4: 0, "-5": 1};
+check(obj, "024foo-5");
+obj.x = 1;
+check(obj, "024foo-5x");
+obj[1] = 1;
+check(obj, "0124foo-5x");
+obj[1.2] = 1;
+check(obj, "0124foo-5x1.2");
+Object.defineProperty(obj, '3', {value:1,enumerable:false,configurable:false,writable:false});
+check(obj, "0124foo-5x1.2", "01234foo-5x1.2");
+delete obj[2];
+check(obj, "014foo-5x1.2", "0134foo-5x1.2");
+obj[2] = 1;
+check(obj, "0124foo-5x1.2", "01234foo-5x1.2");
+
+assertEq(JSON.stringify(obj), '{"0":0,"1":1,"2":1,"4":0,"foo":"bar","-5":1,"x":1,"1.2":1}');
+
+var arr = [1, 2, 3];
+Object.defineProperty(arr, '3', {value:1,enumerable:true,configurable:true,writable:true});
+check(arr, "0123", "0123length");
+Object.defineProperty(arr, '1000', {value:1,enumerable:true,configurable:true,writable:false});
+check(arr, "01231000", "01231000length");
+
+arr = [1, 2, , , 5];
+check(arr, "014", "014length");
+arr[0xfffffff] = 4;
+check(arr, "014268435455", "014268435455length");