Add integration test that modules are loaded from the expected locations (#24170)

* Add integration test that modules are loaded from the expected locations
* Fix ping module to pass PEP8

test/integration/targets/module_precedence/lib_with_extension/ping.py

@@ -0,0 +1,69 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
+# (c) 2016, Toshio Kuratomi <tkuratomi@ansible.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+
+ANSIBLE_METADATA = {'metadata_version': '1.0',
+                    'status': ['stableinterface'],
+                    'supported_by': 'core'}
+
+
+DOCUMENTATION = '''
+---
+module: ping
+version_added: historical
+short_description: Try to connect to host, verify a usable python and return C(pong) on success.
+description:
+   - A trivial test module, this module always returns C(pong) on successful
+     contact. It does not make sense in playbooks, but it is useful from
+     C(/usr/bin/ansible) to verify the ability to login and that a usable python is configured.
+   - This is NOT ICMP ping, this is just a trivial test module.
+options: {}
+author:
+    - "Ansible Core Team"
+    - "Michael DeHaan"
+'''
+
+EXAMPLES = '''
+# Test we can logon to 'webservers' and execute python with json lib.
+ansible webservers -m ping
+'''
+
+from ansible.module_utils.basic import AnsibleModule
+
+
+def main():
+    module = AnsibleModule(
+        argument_spec=dict(
+            data=dict(required=False, default=None),
+        ),
+        supports_check_mode=True
+    )
+    result = dict(ping='pong')
+    if module.params['data']:
+        if module.params['data'] == 'crash':
+            raise Exception("boom")
+        result['ping'] = module.params['data']
+    result['location'] = 'library'
+    module.exit_json(**result)
+
+
+if __name__ == '__main__':
+    main()