mysql_replication: fix crashes caused by deprecated terminology (#71)

* mysql_replication: fix crashes caused by deprecated terminology

* Fix unrelated sanity errors

* Tests: mysql 8.0.21 -> 8.022

* Adjust integration tests

* Add version check to the tests

* Add debug statement

* Adjust mysql version

* Fix tests

* Add unit tests

* Add changelog fragment

* Improve code and coverage

* Get rid of extra blank line

* Improve coverage

* Change suggested

tests/unit/plugins/modules/test_mysql_replication.py

@@ -0,0 +1,47 @@
+# -*- coding: utf-8 -*-
+# Copyright: (c) 2020, Andrew Klychkov (@Andersson007) <aaklychkov@mail.ru>
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import pytest
+
+from ansible_collections.community.mysql.plugins.modules.mysql_replication import uses_replica_terminology
+
+
+class dummy_cursor_class():
+    def __init__(self, output, ret_val_type='dict'):
+        self.output = output
+        self.ret_val_type = ret_val_type
+
+    def execute(self, query):
+        pass
+
+    def fetchone(self):
+        if self.ret_val_type == 'dict':
+            return {'version': self.output}
+
+        elif self.ret_val_type == 'list':
+            return [self.output]
+
+
+@pytest.mark.parametrize(
+    'f_output,c_output,c_ret_type',
+    [
+        (False, '5.5.1-mysql', 'list'),
+        (False, '5.7.0-mysql', 'dict'),
+        (False, '8.0.0-mysql', 'list'),
+        (False, '8.0.11-mysql', 'dict'),
+        (False, '8.0.21-mysql', 'list'),
+        (False, '10.5.0-mariadb', 'dict'),
+        (True, '8.0.22-mysql', 'list'),
+        (True, '8.1.2-mysql', 'dict'),
+        (True, '9.0.0-mysql', 'list'),
+        (True, '10.5.1-mariadb', 'dict'),
+        (True, '10.6.0-mariadb', 'dict'),
+        (True, '11.5.1-mariadb', 'dict'),
+    ]
+)
+def test_uses_replica_terminology(f_output, c_output, c_ret_type):
+    cursor = dummy_cursor_class(c_output, c_ret_type)
+    assert uses_replica_terminology(cursor) == f_output