Source code for aiohttp.test_utils

"""Utilities shared by tests."""

import asyncio
import contextlib
import gc
import inspect
import ipaddress
import os
import socket
import sys
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 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, PY_38, sentinel
from .http import HttpVersion, RawRequestMessage
from .web import (
    Application,
    AppRunner,
    BaseRunner,
    Request,
    Server,
    ServerRunner,
    SockSite,
    UrlMappingMatchInfo,
)
from .web_protocol import _RequestHandler

if TYPE_CHECKING:  # pragma: no cover
    from ssl import SSLContext
else:
    SSLContext = None

if PY_38:
    from unittest import IsolatedAsyncioTestCase as TestCase
else:
    from asynctest import TestCase  # type: ignore[no-redef]

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.AF_INET
) -> 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


[docs]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])
[docs]class BaseTestServer(ABC): __test__ = False def __init__( self, *, scheme: Union[str, _SENTINEL] = sentinel, 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.runner = None # type: Optional[BaseRunner] self._root = None # type: Optional[URL] self.host = host self.port = port self._closed = False self.scheme = scheme self.skip_url_asserts = skip_url_asserts self.socket_factory = socket_factory
[docs] async def start_server(self, **kwargs: Any) -> None: if self.runner: return self._ssl = kwargs.pop("ssl", None) self.runner = await self._make_runner(**kwargs) await self.runner.setup() if not self.port: self.port = 0 absolute_host = self.host try: version = ipaddress.ip_address(self.host).version except ValueError: version = 4 if version == 6: absolute_host = f"[{self.host}]" 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 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}://{absolute_host}:{self.port}")
@abstractmethod # pragma: no cover async def _make_runner(self, **kwargs: Any) -> BaseRunner: pass
[docs] def make_url(self, path: str) -> 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) + 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
[docs] 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
async def __aenter__(self) -> "BaseTestServer": await self.start_server() return self async def __aexit__( self, exc_type: Optional[Type[BaseException]], exc_value: Optional[BaseException], traceback: Optional[TracebackType], ) -> None: await self.close()
[docs]class TestServer(BaseTestServer): def __init__( self, app: Application, *, scheme: Union[str, _SENTINEL] = 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)
[docs]class RawTestServer(BaseTestServer): def __init__( self, handler: _RequestHandler, *, scheme: Union[str, _SENTINEL] = 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, **kwargs: Any) -> ServerRunner: srv = Server(self._handler, **kwargs) return ServerRunner(srv, **kwargs)
[docs]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, **kwargs: Any, ) -> None: if not isinstance(server, BaseTestServer): raise TypeError( "server must be TestServer " "instance, found type: %r" % type(server) ) self._server = server if cookie_jar is None: cookie_jar = aiohttp.CookieJar(unsafe=True) self._session = ClientSession(cookie_jar=cookie_jar, **kwargs) self._closed = False self._responses = [] # type: List[ClientResponse] self._websockets = [] # type: List[ClientWebSocketResponse]
[docs] async def start_server(self) -> None: await self._server.start_server()
@property def scheme(self) -> Union[str, object]: return self._server.scheme @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
[docs] def make_url(self, path: str) -> URL: return self._server.make_url(path)
async def _request(self, method: str, path: str, **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
[docs] def request(self, method: str, path: str, **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))
[docs] def get(self, path: str, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP GET request.""" return _RequestContextManager(self._request(hdrs.METH_GET, path, **kwargs))
[docs] def post(self, path: str, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP POST request.""" return _RequestContextManager(self._request(hdrs.METH_POST, path, **kwargs))
[docs] def options(self, path: str, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP OPTIONS request.""" return _RequestContextManager(self._request(hdrs.METH_OPTIONS, path, **kwargs))
[docs] def head(self, path: str, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP HEAD request.""" return _RequestContextManager(self._request(hdrs.METH_HEAD, path, **kwargs))
[docs] def put(self, path: str, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP PUT request.""" return _RequestContextManager(self._request(hdrs.METH_PUT, path, **kwargs))
[docs] def patch(self, path: str, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP PATCH request.""" return _RequestContextManager(self._request(hdrs.METH_PATCH, path, **kwargs))
[docs] def delete(self, path: str, **kwargs: Any) -> _RequestContextManager: """Perform an HTTP PATCH request.""" return _RequestContextManager(self._request(hdrs.METH_DELETE, path, **kwargs))
[docs] def ws_connect(self, path: str, **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: str, **kwargs: Any) -> ClientWebSocketResponse: ws = await self._session.ws_connect(self.make_url(path), **kwargs) self._websockets.append(ws) return ws
[docs] 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
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()
[docs]class AioHTTPTestCase(TestCase): """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. """
[docs] 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()?")
[docs] def setUp(self) -> None: try: self.loop = asyncio.get_running_loop() except RuntimeError: self.loop = asyncio.get_event_loop_policy().get_event_loop() self.loop.run_until_complete(self.setUpAsync())
[docs] 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()
[docs] def tearDown(self) -> None: self.loop.run_until_complete(self.tearDownAsync())
[docs] async def tearDownAsync(self) -> None: await self.client.close()
[docs] async def get_server(self, app: Application) -> TestServer: """Return a TestServer instance.""" return TestServer(app)
[docs] async def get_client(self, server: TestServer) -> TestClient: """Return a TestClient instance.""" return TestClient(server)
_LOOP_FACTORY = Callable[[], asyncio.AbstractEventLoop]
[docs]@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)
[docs]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() try: module = loop.__class__.__module__ skip_watcher = "uvloop" in module except AttributeError: # pragma: no cover # Just in case skip_watcher = True asyncio.set_event_loop(loop) if sys.platform != "win32" and not skip_watcher: policy = asyncio.get_event_loop_policy() watcher: asyncio.AbstractChildWatcher try: # Python >= 3.8 # Refs: # * https://github.com/pytest-dev/pytest-xdist/issues/620 # * https://stackoverflow.com/a/58614689/595220 # * https://bugs.python.org/issue35621 # * https://github.com/python/cpython/pull/14344 watcher = asyncio.ThreadedChildWatcher() except AttributeError: # Python < 3.8 watcher = asyncio.SafeChildWatcher() watcher.attach_loop(loop) with contextlib.suppress(NotImplementedError): policy.set_child_watcher(watcher) return loop
[docs]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() app.__app_dict = {} app.__getitem__ = get_dict app.__setitem__ = set_dict 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
[docs]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
[docs]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)