Move _handle_no_log_values() out of basic.py (#48628)

* Rename method and make private
* Use is_iterable, combine transformations
* Remove unused return_values from network modules
* Improve docstrings in new functions
* Add new PASS_VAR
* Add unit tests for list_no_log_values
* Fix unit tests for Python 2.6

test/units/module_utils/common/parameters/test_list_deprecations.py

@@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2019 Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+import pytest
+
+from ansible.module_utils.common.parameters import list_deprecations
+
+
+@pytest.fixture
+def params():
+    return {
+        'name': 'bob',
+        'dest': '/etc/hosts',
+        'state': 'present',
+        'value': 5,
+    }
+
+
+def test_list_deprecations():
+    argument_spec = {
+        'old': {'type': 'str', 'removed_in_version': '2.5'}
+    }
+
+    params = {
+        'name': 'rod',
+        'old': 'option',
+    }
+    result = list_deprecations(argument_spec, params)
+    for item in result:
+        assert item['msg'] == "Param 'old' is deprecated. See the module docs for more information"
+        assert item['version'] == '2.5'

test/units/module_utils/common/parameters/test_list_no_log_values.py

@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2019 Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+import pytest
+
+from ansible.module_utils.common.parameters import list_no_log_values
+
+
+@pytest.fixture
+def params():
+    return {
+        'secret': 'undercookwovennativity',
+        'other_secret': 'cautious-slate-makeshift',
+        'state': 'present',
+        'value': 5,
+    }
+
+
+def test_list_no_log_values(params):
+    argument_spec = {
+        'secret': {'type': 'str', 'no_log': True},
+        'other_secret': {'type': 'str', 'no_log': True},
+        'state': {'type': 'str'},
+        'value': {'type': 'int'},
+    }
+    result = set(('undercookwovennativity', 'cautious-slate-makeshift'))
+    assert result == list_no_log_values(argument_spec, params)
+
+
+def test_list_no_log_values_no_secrets(params):
+    argument_spec = {
+        'other_secret': {'type': 'str', 'no_log': False},
+        'state': {'type': 'str'},
+        'value': {'type': 'int'},
+    }
+    result = set()
+    assert result == list_no_log_values(argument_spec, params)