mysql_role: new module (#189)

* mysql_role: new module

* fixes

* fixes

* Add the role class

* Check if role exists

* role.add()

* role.__get_members

* tmp

* tmp

* Change tests

* Fix

* Fix

* add_members()

* get_privs()

* tmp

* __extract_grants() filler version

* Before big work

* tmp

* drop()

* tmp

* tmp

* Big changes

* Fix

* append_members, detach_members, append_privs

* tmp

* admin option

* Add tests

* Add tests

* Fix tests

* Remove debug warning

* Fix tests

* Add documentation

* Fix MariaDB case

* Fix MariaDB

* Fix MariaDB

* Fix MariaDB

* Fix MariaDB

* Fix MariaDB

* Fix

* Fix

* Remove debug warning

* Add try-except block

* tmp

* tmp

* tmp

* Fix

* Add err handling

* Add user check

* Check admin in db

* Fix CI

* Fix CI

* Fix CI

* Fix CI

* Fix

* Add mutually exclusive options

* Small refactoring, documenting

* Documenting, refactoring

* Change docs

* Refactoring

* Refactoring

* Refactoring

* Add unit tests

* Update README.md

tests/unit/plugins/modules/test_mysql_role.py

@@ -0,0 +1,119 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import pytest
+
+from ansible_collections.community.mysql.plugins.modules.mysql_role import (
+    MariaDBQueryBuilder,
+    MySQLQueryBuilder,
+    normalize_users,
+)
+
+# TODO: Also cover DbServer, Role, MySQLRoleImpl, MariaDBRoleImpl classes
+
+
+class Module():
+    def __init__(self):
+        self.msg = None
+
+    def fail_json(self, msg=None):
+        self.msg = msg
+
+
+module = Module()
+
+
+@pytest.mark.parametrize(
+    'builder,output',
+    [
+        (MariaDBQueryBuilder('role0'), ("SELECT count(*) FROM mysql.user WHERE user = %s AND is_role  = 'Y'", ('role0'))),
+        (MySQLQueryBuilder('role0', '%'), ('SELECT count(*) FROM mysql.user WHERE user = %s AND host = %s', ('role0', '%'))),
+        (MariaDBQueryBuilder('role1'), ("SELECT count(*) FROM mysql.user WHERE user = %s AND is_role  = 'Y'", ('role1'))),
+        (MySQLQueryBuilder('role1', 'fake'), ('SELECT count(*) FROM mysql.user WHERE user = %s AND host = %s', ('role1', 'fake'))),
+    ]
+)
+def test_query_builder_role_exists(builder, output):
+    """Test role_exists method of the builder classes."""
+    assert builder.role_exists() == output
+
+
+@pytest.mark.parametrize(
+    'builder,admin,output',
+    [
+        (MariaDBQueryBuilder('role0'), None, ('CREATE ROLE %s', ('role0',))),
+        (MySQLQueryBuilder('role0', '%'), None, ('CREATE ROLE %s', ('role0',))),
+        (MariaDBQueryBuilder('role1'), None, ('CREATE ROLE %s', ('role1',))),
+        (MySQLQueryBuilder('role1', 'fake'), None, ('CREATE ROLE %s', ('role1',))),
+        (MariaDBQueryBuilder('role0'), ('user0', ''), ('CREATE ROLE %s WITH ADMIN %s', ('role0', 'user0'))),
+        (MySQLQueryBuilder('role0', '%'), ('user0', ''), ('CREATE ROLE %s', ('role0',))),
+        (MariaDBQueryBuilder('role1'), ('user0', 'localhost'), ('CREATE ROLE %s WITH ADMIN %s@%s', ('role1', 'user0', 'localhost'))),
+        (MySQLQueryBuilder('role1', 'fake'), ('user0', 'localhost'), ('CREATE ROLE %s', ('role1',))),
+    ]
+)
+def test_query_builder_role_create(builder, admin, output):
+    """Test role_create method of the builder classes."""
+    assert builder.role_create(admin) == output
+
+
+@pytest.mark.parametrize(
+    'builder,user,output',
+    [
+        (MariaDBQueryBuilder('role0'), ('user0', ''), ('GRANT %s TO %s', ('role0', 'user0'))),
+        (MySQLQueryBuilder('role0', '%'), ('user0', ''), ('GRANT %s@%s TO %s', ('role0', '%', 'user0'))),
+        (MariaDBQueryBuilder('role1'), ('user0', 'localhost'), ('GRANT %s TO %s@%s', ('role1', 'user0', 'localhost'))),
+        (MySQLQueryBuilder('role1', 'fake'), ('user0', 'localhost'), ('GRANT %s@%s TO %s@%s', ('role1', 'fake', 'user0', 'localhost'))),
+    ]
+)
+def test_query_builder_role_grant(builder, user, output):
+    """Test role_grant method of the builder classes."""
+    assert builder.role_grant(user) == output
+
+
+@pytest.mark.parametrize(
+    'builder,user,output',
+    [
+        (MariaDBQueryBuilder('role0'), ('user0', ''), ('REVOKE %s FROM %s', ('role0', 'user0'))),
+        (MySQLQueryBuilder('role0', '%'), ('user0', ''), ('REVOKE %s@%s FROM %s', ('role0', '%', 'user0'))),
+        (MariaDBQueryBuilder('role1'), ('user0', 'localhost'), ('REVOKE %s FROM %s@%s', ('role1', 'user0', 'localhost'))),
+        (MySQLQueryBuilder('role1', 'fake'), ('user0', 'localhost'), ('REVOKE %s@%s FROM %s@%s', ('role1', 'fake', 'user0', 'localhost'))),
+    ]
+)
+def test_query_builder_role_revoke(builder, user, output):
+    """Test role_revoke method of the builder classes."""
+    assert builder.role_revoke(user) == output
+
+
+@pytest.mark.parametrize(
+    'input_,output,is_mariadb',
+    [
+        (['user'], [('user', '')], True),
+        (['user'], [('user', '%')], False),
+        (['user@%'], [('user', '%')], True),
+        (['user@%'], [('user', '%')], False),
+        (['user@localhost'], [('user', 'localhost')], True),
+        (['user@localhost'], [('user', 'localhost')], False),
+        (['user', 'user@%'], [('user', ''), ('user', '%')], True),
+        (['user', 'user@%'], [('user', '%'), ('user', '%')], False),
+    ]
+)
+def test_normalize_users(input_, output, is_mariadb):
+    """Test normalize_users function with expected input."""
+    assert normalize_users(None, input_, is_mariadb) == output
+
+
+@pytest.mark.parametrize(
+    'input_,is_mariadb,err_msg',
+    [
+        ([''], True, "Member's name cannot be empty."),
+        ([''], False, "Member's name cannot be empty."),
+        ([None], True, "Error occured while parsing"),
+        ([None], False, "Error occured while parsing"),
+    ]
+)
+def test_normalize_users_failing(input_, is_mariadb, err_msg):
+    """Test normalize_users function with wrong input."""
+
+    normalize_users(module, input_, is_mariadb)
+    assert err_msg in module.msg