Add unit tests

.github/workflows/ansible-test-plugins.yml

@@ -101,3 +101,44 @@ jobs:
       - uses: codecov/codecov-action@v1
         with:
           fail_ci_if_error: false
+
+  units:
+    runs-on: ubuntu-latest
+    name: Units (Ⓐ${{ matrix.ansible }})
+    strategy:
+      # As soon as the first unit test fails,
+      # cancel the others to free up the CI queue
+      fail-fast: true
+      matrix:
+        ansible:
+          - stable-2.10
+          - devel
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+        with:
+          path: ./ansible_collections/community/mysql
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Install ansible-base (${{matrix.ansible}})
+        run: pip install https://github.com/ansible/ansible/archive/${{ matrix.ansible }}.tar.gz --disable-pip-version-check
+
+      # Run the unit tests
+      - name: Run unit test
+        run: ansible-test units -v --color --docker --coverage
+        working-directory: ./ansible_collections/community/mysql
+
+      # ansible-test support producing code coverage date
+      - name: Generate coverage report
+        run: ansible-test coverage xml -v --requirements --group-by command --group-by version
+        working-directory: ./ansible_collections/community/mysql
+
+      # See the reports at https://codecov.io/gh/GITHUBORG/REPONAME
+      - uses: codecov/codecov-action@v1
+        with:
+          fail_ci_if_error: false

tests/unit/plugins/modules/test_mysql_replication.py

@@ -0,0 +1,46 @@
+# -*- 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'),
+    ]
+)
+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