test_client_ws.py

import asyncio
import base64
import hashlib
import os
from unittest import mock

import pytest

import aiohttp
from aiohttp import client, hdrs
from aiohttp.http import WS_KEY
from aiohttp.log import ws_logger
from aiohttp.streams import EofStream
from aiohttp.test_utils import make_mocked_coro


@pytest.fixture
def key_data():
    return os.urandom(16)


@pytest.fixture
def key(key_data):
    return base64.b64encode(key_data)


@pytest.fixture
def ws_key(key):
    return base64.b64encode(hashlib.sha1(key + WS_KEY).digest()).decode()


async def test_ws_connect(ws_key, loop, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
        hdrs.SEC_WEBSOCKET_PROTOCOL: 'chat'
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            res = await aiohttp.ClientSession().ws_connect(
                'http://test.org',
                protocols=('t1', 't2', 'chat'))

    assert isinstance(res, client.ClientWebSocketResponse)
    assert res.protocol == 'chat'
    assert hdrs.ORIGIN not in m_req.call_args[1]["headers"]


async def test_ws_connect_with_origin(key_data, loop) -> None:
    resp = mock.Mock()
    resp.status = 403
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            origin = 'https://example.org/page.html'
            with pytest.raises(client.WSServerHandshakeError):
                await aiohttp.ClientSession().ws_connect(
                    'http://test.org', origin=origin)

    assert hdrs.ORIGIN in m_req.call_args[1]["headers"]
    assert m_req.call_args[1]["headers"][hdrs.ORIGIN] == origin


async def test_ws_connect_custom_response(loop, ws_key, key_data) -> None:

    class CustomResponse(client.ClientWebSocketResponse):
        def read(self, decode=False):
            return 'customized!'

    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            res = await aiohttp.ClientSession(
                ws_response_class=CustomResponse).ws_connect(
                    'http://test.org')

    assert res.read() == 'customized!'


async def test_ws_connect_err_status(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 500
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            with pytest.raises(client.WSServerHandshakeError) as ctx:
                await aiohttp.ClientSession().ws_connect(
                    'http://test.org',
                    protocols=('t1', 't2', 'chat'))

    assert ctx.value.message == 'Invalid response status'


async def test_ws_connect_err_upgrade(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: 'test',
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            with pytest.raises(client.WSServerHandshakeError) as ctx:
                await aiohttp.ClientSession().ws_connect(
                    'http://test.org',
                    protocols=('t1', 't2', 'chat'))

    assert ctx.value.message == 'Invalid upgrade header'


async def test_ws_connect_err_conn(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: 'close',
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            with pytest.raises(client.WSServerHandshakeError) as ctx:
                await aiohttp.ClientSession().ws_connect(
                    'http://test.org',
                    protocols=('t1', 't2', 'chat'))

    assert ctx.value.message == 'Invalid connection header'


async def test_ws_connect_err_challenge(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: 'asdfasdfasdfasdfasdfasdf'
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            with pytest.raises(client.WSServerHandshakeError) as ctx:
                await aiohttp.ClientSession().ws_connect(
                    'http://test.org',
                    protocols=('t1', 't2', 'chat'))

    assert ctx.value.message == 'Invalid challenge response'


async def test_ws_connect_common_headers(ws_key, loop, key_data) -> None:
    """Emulate a headers dict being reused for a second ws_connect.

    In this scenario, we need to ensure that the newly generated secret key
    is sent to the server, not the stale key.
    """
    headers = {}

    async def test_connection() -> None:

        async def mock_get(*args, **kwargs):
            resp = mock.Mock()
            resp.status = 101
            key = kwargs.get('headers').get(hdrs.SEC_WEBSOCKET_KEY)
            accept = base64.b64encode(
                hashlib.sha1(base64.b64encode(base64.b64decode(key)) + WS_KEY)
                .digest()).decode()
            resp.headers = {
                hdrs.UPGRADE: hdrs.WEBSOCKET,
                hdrs.CONNECTION: hdrs.UPGRADE,
                hdrs.SEC_WEBSOCKET_ACCEPT: accept,
                hdrs.SEC_WEBSOCKET_PROTOCOL: 'chat'
            }
            return resp
        with mock.patch('aiohttp.client.os') as m_os:
            with mock.patch('aiohttp.client.ClientSession.request',
                            side_effect=mock_get) as m_req:
                m_os.urandom.return_value = key_data

                res = await aiohttp.ClientSession().ws_connect(
                    'http://test.org',
                    protocols=('t1', 't2', 'chat'),
                    headers=headers)

        assert isinstance(res, client.ClientWebSocketResponse)
        assert res.protocol == 'chat'
        assert hdrs.ORIGIN not in m_req.call_args[1]["headers"]

    await test_connection()
    # Generate a new ws key
    key_data = os.urandom(16)
    await test_connection()


async def test_close(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
    }
    with mock.patch('aiohttp.client.WebSocketWriter') as WebSocketWriter:
        with mock.patch('aiohttp.client.os') as m_os:
            with mock.patch('aiohttp.client.ClientSession.request') as m_req:
                m_os.urandom.return_value = key_data
                m_req.return_value = loop.create_future()
                m_req.return_value.set_result(resp)
                writer = mock.Mock()
                WebSocketWriter.return_value = writer
                writer.close = make_mocked_coro()

                session = aiohttp.ClientSession()
                resp = await session.ws_connect(
                    'http://test.org')
                assert not resp.closed

                resp._reader.feed_data(
                    aiohttp.WSMessage(aiohttp.WSMsgType.CLOSE, b'', b''), 0)

                res = await resp.close()
                writer.close.assert_called_with(1000, b'')
                assert resp.closed
                assert res
                assert resp.exception() is None

                # idempotent
                res = await resp.close()
                assert not res
                assert writer.close.call_count == 1

                await session.close()


async def test_close_eofstream(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
    }
    with mock.patch('aiohttp.client.WebSocketWriter') as WebSocketWriter:
        with mock.patch('aiohttp.client.os') as m_os:
            with mock.patch('aiohttp.client.ClientSession.request') as m_req:
                m_os.urandom.return_value = key_data
                m_req.return_value = loop.create_future()
                m_req.return_value.set_result(resp)
                writer = WebSocketWriter.return_value = mock.Mock()

                session = aiohttp.ClientSession()
                resp = await session.ws_connect('http://test.org')
                assert not resp.closed

                exc = EofStream()
                resp._reader.set_exception(exc)

                await resp.receive()
                writer.close.assert_called_with(1000, b'')
                assert resp.closed

                await session.close()


async def test_close_exc(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
    }
    with mock.patch('aiohttp.client.WebSocketWriter') as WebSocketWriter:
        with mock.patch('aiohttp.client.os') as m_os:
            with mock.patch('aiohttp.client.ClientSession.request') as m_req:
                m_os.urandom.return_value = key_data
                m_req.return_value = loop.create_future()
                m_req.return_value.set_result(resp)
                writer = mock.Mock()
                WebSocketWriter.return_value = writer
                writer.close = make_mocked_coro()

                session = aiohttp.ClientSession()
                resp = await session.ws_connect('http://test.org')
                assert not resp.closed

                exc = ValueError()
                resp._reader.set_exception(exc)

                await resp.close()
                assert resp.closed
                assert resp.exception() is exc

                await session.close()


async def test_close_exc2(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
    }
    with mock.patch('aiohttp.client.WebSocketWriter') as WebSocketWriter:
        with mock.patch('aiohttp.client.os') as m_os:
            with mock.patch('aiohttp.client.ClientSession.request') as m_req:
                m_os.urandom.return_value = key_data
                m_req.return_value = loop.create_future()
                m_req.return_value.set_result(resp)
                writer = WebSocketWriter.return_value = mock.Mock()

                resp = await aiohttp.ClientSession().ws_connect(
                    'http://test.org')
                assert not resp.closed

                exc = ValueError()
                writer.close.side_effect = exc

                await resp.close()
                assert resp.closed
                assert resp.exception() is exc

                resp._closed = False
                writer.close.side_effect = asyncio.CancelledError()
                with pytest.raises(asyncio.CancelledError):
                    await resp.close()


async def test_send_data_after_close(ws_key, key_data, loop, mocker) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            resp = await aiohttp.ClientSession().ws_connect(
                'http://test.org')
            resp._writer._closing = True

            mocker.spy(ws_logger, 'warning')

            for meth, args in ((resp.ping, ()),
                               (resp.pong, ()),
                               (resp.send_str, ('s',)),
                               (resp.send_bytes, (b'b',)),
                               (resp.send_json, ({},))):
                await meth(*args)
                assert ws_logger.warning.called
                ws_logger.warning.reset_mock()


async def test_send_data_type_errors(ws_key, key_data, loop) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
    }
    with mock.patch('aiohttp.client.WebSocketWriter') as WebSocketWriter:
        with mock.patch('aiohttp.client.os') as m_os:
            with mock.patch('aiohttp.client.ClientSession.request') as m_req:
                m_os.urandom.return_value = key_data
                m_req.return_value = loop.create_future()
                m_req.return_value.set_result(resp)
                WebSocketWriter.return_value = mock.Mock()

                resp = await aiohttp.ClientSession().ws_connect(
                    'http://test.org')

                with pytest.raises(TypeError):
                    await resp.send_str(b's')
                with pytest.raises(TypeError):
                    await resp.send_bytes('b')
                with pytest.raises(TypeError):
                    await resp.send_json(set())


async def test_reader_read_exception(ws_key, key_data, loop) -> None:
    hresp = mock.Mock()
    hresp.status = 101
    hresp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
    }
    with mock.patch('aiohttp.client.WebSocketWriter') as WebSocketWriter:
        with mock.patch('aiohttp.client.os') as m_os:
            with mock.patch('aiohttp.client.ClientSession.request') as m_req:
                m_os.urandom.return_value = key_data
                m_req.return_value = loop.create_future()
                m_req.return_value.set_result(hresp)

                writer = mock.Mock()
                WebSocketWriter.return_value = writer
                writer.close = make_mocked_coro()

                session = aiohttp.ClientSession()
                resp = await session.ws_connect('http://test.org')

                exc = ValueError()
                resp._reader.set_exception(exc)

                msg = await resp.receive()
                assert msg.type == aiohttp.WSMsgType.ERROR
                assert resp.exception() is exc

                await session.close()


async def test_receive_runtime_err(loop) -> None:
    resp = client.ClientWebSocketResponse(
        mock.Mock(), mock.Mock(), mock.Mock(), mock.Mock(), 10.0,
        True, True, loop)
    resp._waiting = True

    with pytest.raises(RuntimeError):
        await resp.receive()


async def test_ws_connect_close_resp_on_err(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 500
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            with pytest.raises(client.WSServerHandshakeError):
                await aiohttp.ClientSession().ws_connect(
                    'http://test.org',
                    protocols=('t1', 't2', 'chat'))
            resp.close.assert_called_with()


async def test_ws_connect_non_overlapped_protocols(ws_key,
                                                   loop, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
        hdrs.SEC_WEBSOCKET_PROTOCOL: 'other,another'
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            res = await aiohttp.ClientSession().ws_connect(
                'http://test.org',
                protocols=('t1', 't2', 'chat'))

    assert res.protocol is None


async def test_ws_connect_non_overlapped_protocols_2(ws_key,
                                                     loop, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
        hdrs.SEC_WEBSOCKET_PROTOCOL: 'other,another'
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            connector = aiohttp.TCPConnector(force_close=True)
            res = await aiohttp.ClientSession(
                connector=connector).ws_connect(
                'http://test.org',
                protocols=('t1', 't2', 'chat'))

    assert res.protocol is None
    del res


async def test_ws_connect_deflate(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
        hdrs.SEC_WEBSOCKET_EXTENSIONS: 'permessage-deflate',
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            res = await aiohttp.ClientSession().ws_connect(
                'http://test.org', compress=15)

    assert res.compress == 15
    assert res.client_notakeover is False


async def test_ws_connect_deflate_per_message(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
        hdrs.SEC_WEBSOCKET_EXTENSIONS: 'permessage-deflate',
    }
    with mock.patch('aiohttp.client.WebSocketWriter') as WebSocketWriter:
        with mock.patch('aiohttp.client.os') as m_os:
            with mock.patch('aiohttp.client.ClientSession.request') as m_req:
                m_os.urandom.return_value = key_data
                m_req.return_value = loop.create_future()
                m_req.return_value.set_result(resp)
                writer = WebSocketWriter.return_value = mock.Mock()
                send = writer.send = make_mocked_coro()

                session = aiohttp.ClientSession()
                resp = await session.ws_connect('http://test.org')

                await resp.send_str('string', compress=-1)
                send.assert_called_with('string', binary=False, compress=-1)

                await resp.send_bytes(b'bytes', compress=15)
                send.assert_called_with(b'bytes', binary=True, compress=15)

                await resp.send_json([{}], compress=-9)
                send.assert_called_with('[{}]', binary=False, compress=-9)

                await session.close()


async def test_ws_connect_deflate_server_not_support(loop,
                                                     ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            res = await aiohttp.ClientSession().ws_connect(
                'http://test.org', compress=15)

    assert res.compress == 0
    assert res.client_notakeover is False


async def test_ws_connect_deflate_notakeover(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
        hdrs.SEC_WEBSOCKET_EXTENSIONS: 'permessage-deflate; '
                                       'client_no_context_takeover',
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            res = await aiohttp.ClientSession().ws_connect(
                'http://test.org', compress=15)

    assert res.compress == 15
    assert res.client_notakeover is True


async def test_ws_connect_deflate_client_wbits(loop, ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
        hdrs.SEC_WEBSOCKET_EXTENSIONS: 'permessage-deflate; '
                                       'client_max_window_bits=10',
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            res = await aiohttp.ClientSession().ws_connect(
                'http://test.org', compress=15)

    assert res.compress == 10
    assert res.client_notakeover is False


async def test_ws_connect_deflate_client_wbits_bad(loop,
                                                   ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
        hdrs.SEC_WEBSOCKET_EXTENSIONS: 'permessage-deflate; '
                                       'client_max_window_bits=6',
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            with pytest.raises(client.WSServerHandshakeError):
                await aiohttp.ClientSession().ws_connect(
                    'http://test.org', compress=15)


async def test_ws_connect_deflate_server_ext_bad(loop,
                                                 ws_key, key_data) -> None:
    resp = mock.Mock()
    resp.status = 101
    resp.headers = {
        hdrs.UPGRADE: hdrs.WEBSOCKET,
        hdrs.CONNECTION: hdrs.UPGRADE,
        hdrs.SEC_WEBSOCKET_ACCEPT: ws_key,
        hdrs.SEC_WEBSOCKET_EXTENSIONS: 'permessage-deflate; bad',
    }
    with mock.patch('aiohttp.client.os') as m_os:
        with mock.patch('aiohttp.client.ClientSession.request') as m_req:
            m_os.urandom.return_value = key_data
            m_req.return_value = loop.create_future()
            m_req.return_value.set_result(resp)

            with pytest.raises(client.WSServerHandshakeError):
                await aiohttp.ClientSession().ws_connect(
                    'http://test.org', compress=15)