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Editing: test_utils.py
"""Utilities shared by tests.""" import asyncio import contextlib import gc import inspect import ipaddress import os import socket import sys import warnings from abc import ABC, abstractmethod from types import TracebackType from typing import ( TYPE_CHECKING, Any, Callable, Iterator, List, Optional, Type, Union, cast, ) from unittest import IsolatedAsyncioTestCase, mock from aiosignal import Signal from multidict import CIMultiDict, CIMultiDictProxy from yarl import URL import aiohttp from aiohttp.client import _RequestContextManager, _WSRequestContextManager from . import ClientSession, hdrs from .abc import AbstractCookieJar from .client_reqrep import ClientResponse from .client_ws import ClientWebSocketResponse from .helpers import sentinel from .http import HttpVersion, RawRequestMessage from .typedefs import StrOrURL from .web import ( Application, AppRunner, BaseRunner, Request, Server, ServerRunner, SockSite, UrlMappingMatchInfo, ) from .web_protocol import _RequestHandler if TYPE_CHECKING: from ssl import SSLContext else: SSLContext = None REUSE_ADDRESS = os.name == "posix" and sys.platform != "cygwin" def get_unused_port_socket( host: str, family: socket.AddressFamily = socket.AF_INET ) -> socket.socket: return get_port_socket(host, 0, family) def get_port_socket( host: str, port: int, family: socket.AddressFamily ) -> socket.socket: s = socket.socket(family, socket.SOCK_STREAM) if REUSE_ADDRESS: # Windows has different semantics for SO_REUSEADDR, # so don't set it. Ref: # https://docs.microsoft.com/en-us/windows/win32/winsock/using-so-reuseaddr-and-so-exclusiveaddruse s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) s.bind((host, port)) return s def unused_port() -> int: """Return a port that is unused on the current host.""" with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: s.bind(("127.0.0.1", 0)) return cast(int, s.getsockname()[1]) class BaseTestServer(ABC): __test__ = False def __init__( self, *, scheme: Union[str, object] = sentinel, loop: Optional[asyncio.AbstractEventLoop] = None, host: str = "127.0.0.1", port: Optional[int] = None, skip_url_asserts: bool = False, socket_factory: Callable[ [str, int, socket.AddressFamily], socket.socket ] = get_port_socket, **kwargs: Any, ) -> None: self._loop = loop self.runner: Optional[BaseRunner] = None self._root: Optional[URL] = None self.host = host self.port = port self._closed = False self.scheme = scheme self.skip_url_asserts = skip_url_asserts self.socket_factory = socket_factory async def start_server( self, loop: Optional[asyncio.AbstractEventLoop] = None, **kwargs: Any ) -> None: if self.runner: return self._loop = loop self._ssl = kwargs.pop("ssl", None) self.runner = await self._make_runner(handler_cancellation=True, **kwargs) await self.runner.setup() if not self.port: self.port = 0 try: version = ipaddress.ip_address(self.host).version except ValueError: version = 4 family = socket.AF_INET6 if version == 6 else socket.AF_INET _sock = self.socket_factory(self.host, self.port, family) self.host, self.port = _sock.getsockname()[:2] site = SockSite(self.runner, sock=_sock, ssl_context=self._ssl) await site.start() server = site._server assert server is not None sockets = server.sockets # type: ignore[attr-defined] assert sockets is not None self.port = sockets[0].getsockname()[1] if self.scheme is sentinel: if self._ssl: scheme = "https" else: scheme = "http" self.scheme = scheme self._root = URL(f"{self.scheme}://{self.host}:{self.port}") @abstractmethod # pragma: no cover async def _make_runner(self, **kwargs: Any) -> BaseRunner: pass def make_url(self, path: StrOrURL) -> URL: assert self._root is not None url = URL(path) if not self.skip_url_asserts: assert not url.is_absolute() return self._root.join(url) else: return URL(str(self._root) + str(path)) @property def started(self) -> bool: return self.runner is not None @property def closed(self) -> bool: return self._closed @property def handler(self) -> Server: # for backward compatibility # web.Server instance runner = self.runner assert runner is not None assert runner.server is not None return runner.server async def close(self) -> None: """Close all fixtures created by the test client. After that point, the TestClient is no longer usable. This is an idempotent function: running close multiple times will not have any additional effects. close is also run when the object is garbage collected, and on exit when used as a context manager. """ if self.started and not self.closed: assert self.runner is not None await self.runner.cleanup() self._root = None self.port = None self._closed = True def __enter__(self) -> None: raise TypeError("Use async with instead") def __exit__( self, exc_type: Optional[Type[BaseException]], exc_value: Optional[BaseException], traceback: Optional[TracebackType], ) -> None: # __exit__ should exist in pair with __enter__ but never executed pass # pragma: no cover async def __aenter__(self) -> "BaseTestServer": await self.start_server(loop=self._loop) return self async def __aexit__( self, exc_type: Optional[Type[BaseException]], exc_value: Optional[BaseException], traceback: Optional[TracebackType], ) -> None: await self.close() class TestServer(BaseTestServer): def __init__( self, app: Application, *, scheme: Union[str, object] = sentinel, host: str = "127.0.0.1", port: Optional[int] = None, **kwargs: Any, ): self.app = app super().__init__(scheme=scheme, host=host, port=port, **kwargs) async def _make_runner(self, **kwargs: Any) -> BaseRunner: return AppRunner(self.app, **kwargs) class RawTestServer(BaseTestServer): def __init__( self, handler: _RequestHandler, *, scheme: Union[str, object] = sentinel, host: str = "127.0.0.1", port: Optional[int] = None, **kwargs: Any, ) -> None: self._handler = handler super().__init__(scheme=scheme, host=host, port=port, **kwargs) async def _make_runner(self, debug: bool = True, **kwargs: Any) -> ServerRunner: srv = Server(self._handler, loop=self._loop, debug=debug, **kwargs) return ServerRunner(srv, debug=debug, **kwargs) class TestClient: """ A test client implementation. To write functional tests for aiohttp based servers. """ __test__ = False def __init__( self, server: BaseTestServer, *, cookie_jar: Optional[AbstractCookieJar] = None, loop: Optional[asyncio.AbstractEventLoop] = None, **kwargs: Any, ) -> None: if not isinstance(server, BaseTestServer): raise TypeError( "server must be TestServer " "instance, found type: %r" % type(server) ) self._server = server self._loop = loop if cookie_jar is None: cookie_jar = aiohttp.CookieJar(unsafe=True, loop=loop) self._session = ClientSession(loop=loop, cookie_jar=cookie_jar, **kwargs) self._closed = False self._responses: List[ClientResponse] = [] self._websockets: List[ClientWebSocketResponse] = [] async def start_server(self) -> None: await self._server.start_server(loop=self._loop) @property def host(self) -> str: return self._server.host @property def port(self) -> Optional[int]: return self._server.port @property def server(self) -> BaseTestServer: return self._server @property def app(self) -> Optional[Application]: return cast(Optional[Application], getattr(self._server, "app", None)) @property def session(self) -> ClientSession: """An internal aiohttp.ClientSession. Unlike the methods on the TestClient, client session requests do not automatically include the host in the url queried, and will require an absolute path to the resource. """ return self._session def make_url(self, path: StrOrURL) -> URL: return self._server.make_url(path) async def _request( self, method: str, path: StrOrURL, **kwargs: Any ) -> ClientResponse: resp = await self._session.request(method, self.make_url(path), **kwargs) # save it to close later self._responses.append(resp) return resp def request( self, method: str, path: StrOrURL, **kwargs: Any ) -> _RequestContextManager: """Routes a request to tested http server. The interface is identical to aiohttp.ClientSession.request, except the loop kwarg is overridden by the instance used by the test server. """ return _RequestContextManager(self._request(method, path, **kwargs)) def get(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP GET request.""" return _RequestContextManager(self._request(hdrs.METH_GET, path, **kwargs)) def post(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP POST request.""" return _RequestContextManager(self._request(hdrs.METH_POST, path, **kwargs)) def options(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP OPTIONS request.""" return _RequestContextManager(self._request(hdrs.METH_OPTIONS, path, **kwargs)) def head(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP HEAD request.""" return _RequestContextManager(self._request(hdrs.METH_HEAD, path, **kwargs)) def put(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP PUT request.""" return _RequestContextManager(self._request(hdrs.METH_PUT, path, **kwargs)) def patch(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP PATCH request.""" return _RequestContextManager(self._request(hdrs.METH_PATCH, path, **kwargs)) def delete(self, path: StrOrURL, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP PATCH request.""" return _RequestContextManager(self._request(hdrs.METH_DELETE, path, **kwargs)) def ws_connect(self, path: StrOrURL, **kwargs: Any) -> _WSRequestContextManager: """Initiate websocket connection. The api corresponds to aiohttp.ClientSession.ws_connect. """ return _WSRequestContextManager(self._ws_connect(path, **kwargs)) async def _ws_connect( self, path: StrOrURL, **kwargs: Any ) -> ClientWebSocketResponse: ws = await self._session.ws_connect(self.make_url(path), **kwargs) self._websockets.append(ws) return ws async def close(self) -> None: """Close all fixtures created by the test client. After that point, the TestClient is no longer usable. This is an idempotent function: running close multiple times will not have any additional effects. close is also run on exit when used as a(n) (asynchronous) context manager. """ if not self._closed: for resp in self._responses: resp.close() for ws in self._websockets: await ws.close() await self._session.close() await self._server.close() self._closed = True def __enter__(self) -> None: raise TypeError("Use async with instead") def __exit__( self, exc_type: Optional[Type[BaseException]], exc: Optional[BaseException], tb: Optional[TracebackType], ) -> None: # __exit__ should exist in pair with __enter__ but never executed pass # pragma: no cover async def __aenter__(self) -> "TestClient": await self.start_server() return self async def __aexit__( self, exc_type: Optional[Type[BaseException]], exc: Optional[BaseException], tb: Optional[TracebackType], ) -> None: await self.close() class AioHTTPTestCase(IsolatedAsyncioTestCase): """A base class to allow for unittest web applications using aiohttp. Provides the following: * self.client (aiohttp.test_utils.TestClient): an aiohttp test client. * self.loop (asyncio.BaseEventLoop): the event loop in which the application and server are running. * self.app (aiohttp.web.Application): the application returned by self.get_application() Note that the TestClient's methods are asynchronous: you have to execute function on the test client using asynchronous methods. """ async def get_application(self) -> Application: """Get application. This method should be overridden to return the aiohttp.web.Application object to test. """ return self.get_app() def get_app(self) -> Application: """Obsolete method used to constructing web application. Use .get_application() coroutine instead. """ raise RuntimeError("Did you forget to define get_application()?") async def asyncSetUp(self) -> None: self.loop = asyncio.get_running_loop() return await self.setUpAsync() async def setUpAsync(self) -> None: self.app = await self.get_application() self.server = await self.get_server(self.app) self.client = await self.get_client(self.server) await self.client.start_server() async def asyncTearDown(self) -> None: return await self.tearDownAsync() async def tearDownAsync(self) -> None: await self.client.close() async def get_server(self, app: Application) -> TestServer: """Return a TestServer instance.""" return TestServer(app, loop=self.loop) async def get_client(self, server: TestServer) -> TestClient: """Return a TestClient instance.""" return TestClient(server, loop=self.loop) def unittest_run_loop(func: Any, *args: Any, **kwargs: Any) -> Any: """ A decorator dedicated to use with asynchronous AioHTTPTestCase test methods. In 3.8+, this does nothing. """ warnings.warn( "Decorator `@unittest_run_loop` is no longer needed in aiohttp 3.8+", DeprecationWarning, stacklevel=2, ) return func _LOOP_FACTORY = Callable[[], asyncio.AbstractEventLoop] @contextlib.contextmanager def loop_context( loop_factory: _LOOP_FACTORY = asyncio.new_event_loop, fast: bool = False ) -> Iterator[asyncio.AbstractEventLoop]: """A contextmanager that creates an event_loop, for test purposes. Handles the creation and cleanup of a test loop. """ loop = setup_test_loop(loop_factory) yield loop teardown_test_loop(loop, fast=fast) def setup_test_loop( loop_factory: _LOOP_FACTORY = asyncio.new_event_loop, ) -> asyncio.AbstractEventLoop: """Create and return an asyncio.BaseEventLoop instance. The caller should also call teardown_test_loop, once they are done with the loop. """ loop = loop_factory() asyncio.set_event_loop(loop) return loop def teardown_test_loop(loop: asyncio.AbstractEventLoop, fast: bool = False) -> None: """Teardown and cleanup an event_loop created by setup_test_loop.""" closed = loop.is_closed() if not closed: loop.call_soon(loop.stop) loop.run_forever() loop.close() if not fast: gc.collect() asyncio.set_event_loop(None) def _create_app_mock() -> mock.MagicMock: def get_dict(app: Any, key: str) -> Any: return app.__app_dict[key] def set_dict(app: Any, key: str, value: Any) -> None: app.__app_dict[key] = value app = mock.MagicMock(spec=Application) app.__app_dict = {} app.__getitem__ = get_dict app.__setitem__ = set_dict app._debug = False app.on_response_prepare = Signal(app) app.on_response_prepare.freeze() return app def _create_transport(sslcontext: Optional[SSLContext] = None) -> mock.Mock: transport = mock.Mock() def get_extra_info(key: str) -> Optional[SSLContext]: if key == "sslcontext": return sslcontext else: return None transport.get_extra_info.side_effect = get_extra_info return transport def make_mocked_request( method: str, path: str, headers: Any = None, *, match_info: Any = sentinel, version: HttpVersion = HttpVersion(1, 1), closing: bool = False, app: Any = None, writer: Any = sentinel, protocol: Any = sentinel, transport: Any = sentinel, payload: Any = sentinel, sslcontext: Optional[SSLContext] = None, client_max_size: int = 1024**2, loop: Any = ..., ) -> Request: """Creates mocked web.Request testing purposes. Useful in unit tests, when spinning full web server is overkill or specific conditions and errors are hard to trigger. """ task = mock.Mock() if loop is ...: loop = mock.Mock() loop.create_future.return_value = () if version < HttpVersion(1, 1): closing = True if headers: headers = CIMultiDictProxy(CIMultiDict(headers)) raw_hdrs = tuple( (k.encode("utf-8"), v.encode("utf-8")) for k, v in headers.items() ) else: headers = CIMultiDictProxy(CIMultiDict()) raw_hdrs = () chunked = "chunked" in headers.get(hdrs.TRANSFER_ENCODING, "").lower() message = RawRequestMessage( method, path, version, headers, raw_hdrs, closing, None, False, chunked, URL(path), ) if app is None: app = _create_app_mock() if transport is sentinel: transport = _create_transport(sslcontext) if protocol is sentinel: protocol = mock.Mock() protocol.transport = transport if writer is sentinel: writer = mock.Mock() writer.write_headers = make_mocked_coro(None) writer.write = make_mocked_coro(None) writer.write_eof = make_mocked_coro(None) writer.drain = make_mocked_coro(None) writer.transport = transport protocol.transport = transport protocol.writer = writer if payload is sentinel: payload = mock.Mock() req = Request( message, payload, protocol, writer, task, loop, client_max_size=client_max_size ) match_info = UrlMappingMatchInfo( {} if match_info is sentinel else match_info, mock.Mock() ) match_info.add_app(app) req._match_info = match_info return req def make_mocked_coro( return_value: Any = sentinel, raise_exception: Any = sentinel ) -> Any: """Creates a coroutine mock.""" async def mock_coro(*args: Any, **kwargs: Any) -> Any: if raise_exception is not sentinel: raise raise_exception if not inspect.isawaitable(return_value): return return_value await return_value return mock.Mock(wraps=mock_coro)
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