add docstrings for every fixture and test methods

also add tests for missing components

tests/ahriman/web/middlewares/conftest.py

@@ -0,0 +1,15 @@
+import pytest
+
+from collections import namedtuple
+
+
+_request = namedtuple("_request", ["path"])
+
+
+@pytest.fixture
+def aiohttp_request() -> _request:
+    """
+    fixture for aiohttp like object
+    :return: aiohttp like request test instance
+    """
+    return _request("path")

tests/ahriman/web/middlewares/test_exception_handler.py

@@ -0,0 +1,48 @@
+import logging
+import pytest
+
+from aiohttp.web_exceptions import HTTPBadRequest
+from pytest_mock import MockerFixture
+from typing import Any
+
+from ahriman.web.middlewares.exception_handler import exception_handler
+
+
+async def test_exception_handler(aiohttp_request: Any, mocker: MockerFixture) -> None:
+    """
+    must pass success response
+    """
+    request_handler = pytest.helpers.AsyncMock()
+    logging_mock = mocker.patch("logging.Logger.exception")
+
+    handler = exception_handler(logging.getLogger())
+    await handler(aiohttp_request, request_handler)
+    logging_mock.assert_not_called()
+
+
+async def test_exception_handler_client_error(aiohttp_request: Any, mocker: MockerFixture) -> None:
+    """
+    must pass client exception
+    """
+    request_handler = pytest.helpers.AsyncMock()
+    request_handler.side_effect = HTTPBadRequest()
+    logging_mock = mocker.patch("logging.Logger.exception")
+
+    handler = exception_handler(logging.getLogger())
+    with pytest.raises(HTTPBadRequest):
+        await handler(aiohttp_request, request_handler)
+    logging_mock.assert_not_called()
+
+
+async def test_exception_handler_server_error(aiohttp_request: Any, mocker: MockerFixture) -> None:
+    """
+    must log server exception and re-raise it
+    """
+    request_handler = pytest.helpers.AsyncMock()
+    request_handler.side_effect = Exception()
+    logging_mock = mocker.patch("logging.Logger.exception")
+
+    handler = exception_handler(logging.getLogger())
+    with pytest.raises(Exception):
+        await handler(aiohttp_request, request_handler)
+    logging_mock.assert_called_once()