fix(connection): Raise OperationalError for socket timeouts (aws#179)

* Raise OperationalError for socket timeouts

* add unit test and integrationt test

* rectify unit test

* rectify integration test for socket_timeout

* remove empty config.ini

redshift_connector/core.py

@@ -656,6 +656,11 @@ def get_calling_module() -> str:
             self._sock: typing.Optional[typing.BinaryIO] = self._usock.makefile(mode="rwb")
             if tcp_keepalive:
                 self._usock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
+
+        except socket.timeout as timeout_error:
+            self._usock.close()
+            raise OperationalError("connection time out", timeout_error)
+
         except socket.error as e:
             self._usock.close()
             raise InterfaceError("communication error", e)

test/integration/test_connection.py

@@ -307,3 +307,9 @@ def test_execute_do_parsing_bind_params_when_exist(mocker, db_kwargs, sql, args)
     with redshift_connector.connect(**db_kwargs) as conn:
         conn.cursor().execute(sql, args)
     assert convert_paramstyle_spy.called
+
+def test_socket_timeout(db_kwargs):
+    db_kwargs["timeout"] = 0
+
+    with pytest.raises(redshift_connector.InterfaceError):
+        redshift_connector.connect(**db_kwargs)

test/unit/test_connection.py

@@ -2,6 +2,8 @@
 from collections import deque
 from decimal import Decimal
 from unittest.mock import patch
+import socket
+from unittest import mock
 
 import pytest  # type: ignore
 
@@ -12,6 +14,7 @@
     IntegrityError,
     InterfaceError,
     ProgrammingError,
+    OperationalError
 )
 from redshift_connector.config import (
     ClientProtocolVersion,
@@ -328,3 +331,9 @@ def test_client_os_version_is_not_present():
 
     with patch("platform.platform", side_effect=Exception("not for you")):
         assert mock_connection.client_os_version == "unknown"
+
+def test_socket_timeout_error():
+    with mock.patch('socket.socket.connect') as mock_socket:
+        mock_socket.side_effect = (socket.timeout)
+        with pytest.raises(OperationalError):
+            Connection(user='mock_user', password='mock_password', host='localhost', port=8080, database='mocked')