Add test for clean_copy preservation of keys

test/units/executor/test_task_result.py

@@ -147,3 +147,25 @@ class TestTaskResult(unittest.TestCase):
         tr = TaskResult(mock_host, mock_task, dict(_ansible_no_log=True, secret='DONTSHOWME'))
         clean = tr.clean_copy()
         self.assertTrue('secret' not in clean._result)
+
+    def test_task_result_no_log_preserve(self):
+        mock_host = MagicMock()
+        mock_task = MagicMock()
+
+        # no_log should not remove presrved keys
+        tr = TaskResult(
+            mock_host,
+            mock_task,
+            dict(
+                _ansible_no_log=True,
+                retries=5,
+                attempts=5,
+                changed=False,
+                foo='bar',
+            )
+        )
+        clean = tr.clean_copy()
+        self.assertTrue('retries' in clean._result)
+        self.assertTrue('attempts' in clean._result)
+        self.assertTrue('changed' in clean._result)
+        self.assertTrue('foo' not in clean._result)