pythongh-100553: Improve accuracy of sqlite3.Row iter test (pythonGH-100555)

(cherry picked from commit 3dc48da)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>

Author: sobolevn

Lib/test/test_sqlite3/test_factory.py

@@ -179,8 +179,14 @@ def test_sqlite_row_iter(self):
         """Checks if the row object is iterable"""
         self.con.row_factory = sqlite.Row
         row = self.con.execute("select 1 as a, 2 as b").fetchone()
-        for col in row:
-            pass
+
+        # Is iterable in correct order and produces valid results:
+        items = [col for col in row]
+        self.assertEqual(items, [1, 2])
+
+        # Is iterable the second time:
+        items = [col for col in row]
+        self.assertEqual(items, [1, 2])
 
     def test_sqlite_row_as_tuple(self):
         """Checks if the row object can be converted to a tuple"""