Add info command to redis module (#286)

* Add info command to redis module

* Fix sanity test

* Create a separate redis_info module

* Type of arguments in documentation was determined

* Add redis_info test

* Fix sanity test

* Add integration test

* Add integration platforms (centos7/8,fedora30/31,opensuse15+py2,ubuntu1604/1804)

* Add centos6 support

* Fix suggestions

* Add contact email

tests/unit/plugins/modules/database/misc/test_redis_info.py

@@ -0,0 +1,76 @@
+# -*- coding: utf-8 -*-
+
+# Copyright: (c) 2020, Pavlo Bashynskyi (@levonet) <levonet@gmail.com>
+# 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
+
+from ansible_collections.community.general.tests.unit.compat.mock import patch, MagicMock
+from ansible_collections.community.general.plugins.modules.database.misc import redis_info
+from ansible_collections.community.general.tests.unit.plugins.modules.utils import AnsibleExitJson, AnsibleFailJson, ModuleTestCase, set_module_args
+
+
+class FakeRedisClient(MagicMock):
+
+    def ping(self):
+        pass
+
+    def info(self):
+        return {'redis_version': '999.999.999'}
+
+
+class FakeRedisClientFail(MagicMock):
+
+    def ping(self):
+        raise Exception('Test Error')
+
+    def info(self):
+        pass
+
+
+class TestRedisInfoModule(ModuleTestCase):
+
+    def setUp(self):
+        super(TestRedisInfoModule, self).setUp()
+        redis_info.HAS_REDIS_PACKAGE = True
+        self.module = redis_info
+
+    def tearDown(self):
+        super(TestRedisInfoModule, self).tearDown()
+
+    def patch_redis_client(self, **kwds):
+        return patch('ansible_collections.community.general.plugins.modules.database.misc.redis_info.redis_client', autospec=True, **kwds)
+
+    def test_without_parameters(self):
+        """Test without parameters"""
+        with self.patch_redis_client(side_effect=FakeRedisClient) as redis_client:
+            with self.assertRaises(AnsibleExitJson) as result:
+                set_module_args({})
+                self.module.main()
+            self.assertEqual(redis_client.call_count, 1)
+            self.assertEqual(redis_client.call_args, ({'host': 'localhost', 'port': 6379, 'password': None},))
+            self.assertEqual(result.exception.args[0]['info']['redis_version'], '999.999.999')
+
+    def test_with_parameters(self):
+        """Test with all parameters"""
+        with self.patch_redis_client(side_effect=FakeRedisClient) as redis_client:
+            with self.assertRaises(AnsibleExitJson) as result:
+                set_module_args({
+                    'login_host': 'test',
+                    'login_port': 1234,
+                    'login_password': 'PASS'
+                })
+                self.module.main()
+            self.assertEqual(redis_client.call_count, 1)
+            self.assertEqual(redis_client.call_args, ({'host': 'test', 'port': 1234, 'password': 'PASS'},))
+            self.assertEqual(result.exception.args[0]['info']['redis_version'], '999.999.999')
+
+    def test_with_fail_client(self):
+        """Test failure message"""
+        with self.patch_redis_client(side_effect=FakeRedisClientFail) as redis_client:
+            with self.assertRaises(AnsibleFailJson) as result:
+                set_module_args({})
+                self.module.main()
+            self.assertEqual(redis_client.call_count, 1)
+            self.assertEqual(result.exception.args[0]['msg'], 'unable to connect to database: Test Error')