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"""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 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 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.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 = 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
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(**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
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: 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
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 = [] # type: List[ClientResponse]
self._websockets = [] # type: 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: 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
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))
def get(self, path: str, **kwargs: Any) -> _RequestContextManager:
"""Perform an HTTP GET request."""
return _RequestContextManager(self._request(hdrs.METH_GET, path, **kwargs))
def post(self, path: str, **kwargs: Any) -> _RequestContextManager:
"""Perform an HTTP POST request."""
return _RequestContextManager(self._request(hdrs.METH_POST, path, **kwargs))
def options(self, path: str, **kwargs: Any) -> _RequestContextManager:
"""Perform an HTTP OPTIONS request."""
return _RequestContextManager(self._request(hdrs.METH_OPTIONS, path, **kwargs))
def head(self, path: str, **kwargs: Any) -> _RequestContextManager:
"""Perform an HTTP HEAD request."""
return _RequestContextManager(self._request(hdrs.METH_HEAD, path, **kwargs))
def put(self, path: str, **kwargs: Any) -> _RequestContextManager:
"""Perform an HTTP PUT request."""
return _RequestContextManager(self._request(hdrs.METH_PUT, path, **kwargs))
def patch(self, path: str, **kwargs: Any) -> _RequestContextManager:
"""Perform an HTTP PATCH request."""
return _RequestContextManager(self._request(hdrs.METH_PATCH, path, **kwargs))
def delete(self, path: str, **kwargs: Any) -> _RequestContextManager:
"""Perform an HTTP PATCH request."""
return _RequestContextManager(self._request(hdrs.METH_DELETE, path, **kwargs))
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
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(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.
"""
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()?")
def setUp(self) -> None:
try:
self.loop = asyncio.get_running_loop()
except (AttributeError, RuntimeError): # AttributeError->py36
self.loop = asyncio.get_event_loop_policy().get_event_loop()
self.loop.run_until_complete(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()
def tearDown(self) -> None:
self.loop.run_until_complete(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()
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
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._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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