[feat] implement mariadb engine

tests/unit/test_engine_mariadb_server.py

@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# pylint: disable=missing-module-docstring
+
+from unittest.mock import MagicMock, Mock
+from searx.engines import load_engines, mariadb_server
+from tests import SearxTestCase
+
+
+class MariadbServerTests(SearxTestCase):  # pylint: disable=missing-class-docstring
+    def setUp(self):
+        load_engines(
+            [
+                {
+                    'name': 'mariadb server',
+                    'engine': 'mariadb_server',
+                    'shortcut': 'mdb',
+                    'timeout': 9.0,
+                    'disabled': True,
+                }
+            ]
+        )
+
+    def tearDown(self):
+        load_engines([])
+
+    def test_init_no_query_str_raises(self):
+        self.assertRaises(ValueError, lambda: mariadb_server.init({}))
+
+    def test_init_non_select_raises(self):
+        self.assertRaises(ValueError, lambda: mariadb_server.init({'query_str': 'foobar'}))
+
+    def test_search_returns_results(self):
+        test_string = 'FOOBAR'
+        cursor_mock = MagicMock()
+        with cursor_mock as setup:  # pylint: disable=not-context-manager
+            setup.__iter__ = Mock(return_value=iter([{test_string, 1}]))
+            setup.description = [[test_string]]
+        conn_mock = Mock()
+        conn_mock.cursor.return_value = cursor_mock
+        mariadb_server._connection = conn_mock  # pylint: disable=protected-access
+        results = mariadb_server.search(test_string, {'pageno': 1})
+        self.assertEqual(1, len(results))
+        self.assertIn(test_string, results[0])
+        self.assertEqual(mariadb_server.result_template, results[0]['template'])