18649753262

Committed 20 Oct 2025 10:52AM UTC coverage: 92.428% (-0.03%) from 92.462%

Build # 18649753262

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push

github

Committed by

web-flow

Commit Message

Add changelog entry for BufferedByteStream (#1004)

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96.45

/src/anyio/pytest_plugin.py

from __future__ import annotations

import socket
import sys
from collections.abc import Callable, Generator, Iterator
from contextlib import ExitStack, contextmanager
from inspect import isasyncgenfunction, iscoroutinefunction, ismethod
from typing import Any, cast

import pytest
import sniffio
from _pytest.fixtures import SubRequest
from _pytest.outcomes import Exit

from ._core._eventloop import get_all_backends, get_async_backend
from ._core._exceptions import iterate_exceptions
from .abc import TestRunner

if sys.version_info < (3, 11):
    from exceptiongroup import ExceptionGroup

_current_runner: TestRunner | None = None
_runner_stack: ExitStack | None = None
_runner_leases = 0


def extract_backend_and_options(backend: object) -> tuple[str, dict[str, Any]]:
    if isinstance(backend, str):
        return backend, {}
    elif isinstance(backend, tuple) and len(backend) == 2:
        if isinstance(backend[0], str) and isinstance(backend[1], dict):
            return cast(tuple[str, dict[str, Any]], backend)

    raise TypeError("anyio_backend must be either a string or tuple of (string, dict)")


@contextmanager
def get_runner(
    backend_name: str, backend_options: dict[str, Any]
) -> Iterator[TestRunner]:
    global _current_runner, _runner_leases, _runner_stack
    if _current_runner is None:
        asynclib = get_async_backend(backend_name)
        _runner_stack = ExitStack()
        if sniffio.current_async_library_cvar.get(None) is None:
            # Since we're in control of the event loop, we can cache the name of the
            # async library
            token = sniffio.current_async_library_cvar.set(backend_name)
            _runner_stack.callback(sniffio.current_async_library_cvar.reset, token)

        backend_options = backend_options or {}
        _current_runner = _runner_stack.enter_context(
            asynclib.create_test_runner(backend_options)
        )

    _runner_leases += 1
    try:
        yield _current_runner
    finally:
        _runner_leases -= 1
        if not _runner_leases:
            assert _runner_stack is not None
            _runner_stack.close()
            _runner_stack = _current_runner = None


def pytest_addoption(parser: pytest.Parser) -> None:
    parser.addini(
        "anyio_mode",
        default="strict",
        help='AnyIO plugin mode (either "strict" or "auto")',
        type="string",
    )


def pytest_configure(config: pytest.Config) -> None:
    config.addinivalue_line(
        "markers",
        "anyio: mark the (coroutine function) test to be run asynchronously via anyio.",
    )
    if (
        config.getini("anyio_mode") == "auto"
        and config.pluginmanager.has_plugin("asyncio")
        and config.getini("asyncio_mode") == "auto"
    ):
        config.issue_config_time_warning(
            pytest.PytestConfigWarning(
                "AnyIO auto mode has been enabled together with pytest-asyncio auto "
                "mode. This may cause unexpected behavior."
            ),
            1,
        )


@pytest.hookimpl(hookwrapper=True)
def pytest_fixture_setup(fixturedef: Any, request: Any) -> Generator[Any]:
    def wrapper(anyio_backend: Any, request: SubRequest, **kwargs: Any) -> Any:
        # Rebind any fixture methods to the request instance
        if (
            request.instance
            and ismethod(func)
            and type(func.__self__) is type(request.instance)
        ):
            local_func = func.__func__.__get__(request.instance)
        else:
            local_func = func

        backend_name, backend_options = extract_backend_and_options(anyio_backend)
        if has_backend_arg:
            kwargs["anyio_backend"] = anyio_backend

        if has_request_arg:
            kwargs["request"] = request

        with get_runner(backend_name, backend_options) as runner:
            if isasyncgenfunction(local_func):
                yield from runner.run_asyncgen_fixture(local_func, kwargs)
            else:
                yield runner.run_fixture(local_func, kwargs)

    # Only apply this to coroutine functions and async generator functions in requests
    # that involve the anyio_backend fixture
    func = fixturedef.func
    if isasyncgenfunction(func) or iscoroutinefunction(func):
        if "anyio_backend" in request.fixturenames:
            fixturedef.func = wrapper
            original_argname = fixturedef.argnames

            if not (has_backend_arg := "anyio_backend" in fixturedef.argnames):
                fixturedef.argnames += ("anyio_backend",)

            if not (has_request_arg := "request" in fixturedef.argnames):
                fixturedef.argnames += ("request",)

            try:
                return (yield)
            finally:
                fixturedef.func = func
                fixturedef.argnames = original_argname

    return (yield)


@pytest.hookimpl(tryfirst=True)
def pytest_pycollect_makeitem(
    collector: pytest.Module | pytest.Class, name: str, obj: object
) -> None:
    if collector.istestfunction(obj, name):
        inner_func = obj.hypothesis.inner_test if hasattr(obj, "hypothesis") else obj
        if iscoroutinefunction(inner_func):
            anyio_auto_mode = collector.config.getini("anyio_mode") == "auto"
            marker = collector.get_closest_marker("anyio")
            own_markers = getattr(obj, "pytestmark", ())
            if (
                anyio_auto_mode
                or marker
                or any(marker.name == "anyio" for marker in own_markers)
            ):
                pytest.mark.usefixtures("anyio_backend")(obj)


@pytest.hookimpl(tryfirst=True)
def pytest_pyfunc_call(pyfuncitem: Any) -> bool | None:
    def run_with_hypothesis(**kwargs: Any) -> None:
        with get_runner(backend_name, backend_options) as runner:
            runner.run_test(original_func, kwargs)

    backend = pyfuncitem.funcargs.get("anyio_backend")
    if backend:
        backend_name, backend_options = extract_backend_and_options(backend)

        if hasattr(pyfuncitem.obj, "hypothesis"):
            # Wrap the inner test function unless it's already wrapped
            original_func = pyfuncitem.obj.hypothesis.inner_test
            if original_func.__qualname__ != run_with_hypothesis.__qualname__:
                if iscoroutinefunction(original_func):
                    pyfuncitem.obj.hypothesis.inner_test = run_with_hypothesis

            return None

        if iscoroutinefunction(pyfuncitem.obj):
            funcargs = pyfuncitem.funcargs
            testargs = {arg: funcargs[arg] for arg in pyfuncitem._fixtureinfo.argnames}
            with get_runner(backend_name, backend_options) as runner:
                try:
                    runner.run_test(pyfuncitem.obj, testargs)
                except ExceptionGroup as excgrp:
                    for exc in iterate_exceptions(excgrp):
                        if isinstance(exc, (Exit, KeyboardInterrupt, SystemExit)):
                            raise exc from excgrp

                    raise

            return True

    return None


@pytest.fixture(scope="module", params=get_all_backends())
def anyio_backend(request: Any) -> Any:
    return request.param


@pytest.fixture
def anyio_backend_name(anyio_backend: Any) -> str:
    if isinstance(anyio_backend, str):
        return anyio_backend
    else:
        return anyio_backend[0]


@pytest.fixture
def anyio_backend_options(anyio_backend: Any) -> dict[str, Any]:
    if isinstance(anyio_backend, str):
        return {}
    else:
        return anyio_backend[1]


class FreePortFactory:
    """
    Manages port generation based on specified socket kind, ensuring no duplicate
    ports are generated.

    This class provides functionality for generating available free ports on the
    system. It is initialized with a specific socket kind and can generate ports
    for given address families while avoiding reuse of previously generated ports.

    Users should not instantiate this class directly, but use the
    ``free_tcp_port_factory`` and ``free_udp_port_factory`` fixtures instead. For simple
    uses cases, ``free_tcp_port`` and ``free_udp_port`` can be used instead.
    """

    def __init__(self, kind: socket.SocketKind) -> None:
        self._kind = kind
        self._generated = set[int]()

    @property
    def kind(self) -> socket.SocketKind:
        """
        The type of socket connection (e.g., :data:`~socket.SOCK_STREAM` or
        :data:`~socket.SOCK_DGRAM`) used to bind for checking port availability

        """
        return self._kind

    def __call__(self, family: socket.AddressFamily | None = None) -> int:
        """
        Return an unbound port for the given address family.

        :param family: if omitted, both IPv4 and IPv6 addresses will be tried
        :return: a port number

        """
        if family is not None:
            families = [family]
        else:
            families = [socket.AF_INET]
            if socket.has_ipv6:
                families.append(socket.AF_INET6)

        while True:
            port = 0
            with ExitStack() as stack:
                for family in families:
                    sock = stack.enter_context(socket.socket(family, self._kind))
                    addr = "::1" if family == socket.AF_INET6 else "127.0.0.1"
                    try:
                        sock.bind((addr, port))
                    except OSError:
                        break

                    if not port:
                        port = sock.getsockname()[1]
                else:
                    if port not in self._generated:
                        self._generated.add(port)
                        return port


@pytest.fixture(scope="session")
def free_tcp_port_factory() -> FreePortFactory:
    return FreePortFactory(socket.SOCK_STREAM)


@pytest.fixture(scope="session")
def free_udp_port_factory() -> FreePortFactory:
    return FreePortFactory(socket.SOCK_DGRAM)


@pytest.fixture
def free_tcp_port(free_tcp_port_factory: Callable[[], int]) -> int:
    return free_tcp_port_factory()


@pytest.fixture
def free_udp_port(free_udp_port_factory: Callable[[], int]) -> int:
    return free_udp_port_factory()

1	from __future__ import annotations	11✔
2
3	import socket	11✔
4	import sys	11✔
5	from collections.abc import Callable, Generator, Iterator	11✔
6	from contextlib import ExitStack, contextmanager	11✔
7	from inspect import isasyncgenfunction, iscoroutinefunction, ismethod	11✔
8	from typing import Any, cast	11✔
9
10	import pytest	11✔
11	import sniffio	11✔
12	from _pytest.fixtures import SubRequest	11✔
13	from _pytest.outcomes import Exit	11✔
14
15	from ._core._eventloop import get_all_backends, get_async_backend	11✔
16	from ._core._exceptions import iterate_exceptions	11✔
17	from .abc import TestRunner	11✔
18
19	if sys.version_info < (3, 11):	11✔
20	from exceptiongroup import ExceptionGroup	4✔
21
22	_current_runner: TestRunner \| None = None	11✔
23	_runner_stack: ExitStack \| None = None	11✔
24	_runner_leases = 0	11✔
25
26
27	def extract_backend_and_options(backend: object) -> tuple[str, dict[str, Any]]:	11✔
28	if isinstance(backend, str):	11✔
29	return backend, {}	11✔
30	elif isinstance(backend, tuple) and len(backend) == 2:	11✔
31	if isinstance(backend[0], str) and isinstance(backend[1], dict):	11✔
32	return cast(tuple[str, dict[str, Any]], backend)	11✔
33
34	raise TypeError("anyio_backend must be either a string or tuple of (string, dict)")	×
35
36
37	@contextmanager	11✔
38	def get_runner(	11✔
39	backend_name: str, backend_options: dict[str, Any]
40	) -> Iterator[TestRunner]:
41	global _current_runner, _runner_leases, _runner_stack
42	if _current_runner is None:	11✔
43	asynclib = get_async_backend(backend_name)	11✔
44	_runner_stack = ExitStack()	11✔
45	if sniffio.current_async_library_cvar.get(None) is None:	11✔
46	# Since we're in control of the event loop, we can cache the name of the
47	# async library
48	token = sniffio.current_async_library_cvar.set(backend_name)	11✔
49	_runner_stack.callback(sniffio.current_async_library_cvar.reset, token)	11✔
50
51	backend_options = backend_options or {}	11✔
52	_current_runner = _runner_stack.enter_context(	11✔
53	asynclib.create_test_runner(backend_options)
54	)
55
56	_runner_leases += 1	11✔
57	try:	11✔
58	yield _current_runner	11✔
59	finally:
60	_runner_leases -= 1	11✔
61	if not _runner_leases:	11✔
62	assert _runner_stack is not None	11✔
63	_runner_stack.close()	11✔
64	_runner_stack = _current_runner = None	11✔
65
66
67	def pytest_addoption(parser: pytest.Parser) -> None:	11✔
68	parser.addini(	11✔
69	"anyio_mode",
70	default="strict",
71	help='AnyIO plugin mode (either "strict" or "auto")',
72	type="string",
73	)
74
75
76	def pytest_configure(config: pytest.Config) -> None:	11✔
77	config.addinivalue_line(	11✔
78	"markers",
79	"anyio: mark the (coroutine function) test to be run asynchronously via anyio.",
80	)
81	if (	11✔
82	config.getini("anyio_mode") == "auto"
83	and config.pluginmanager.has_plugin("asyncio")
84	and config.getini("asyncio_mode") == "auto"
85	):
86	config.issue_config_time_warning(	11✔
87	pytest.PytestConfigWarning(
88	"AnyIO auto mode has been enabled together with pytest-asyncio auto "
89	"mode. This may cause unexpected behavior."
90	),
91	1,
92	)
93
94
95	@pytest.hookimpl(hookwrapper=True)	11✔
96	def pytest_fixture_setup(fixturedef: Any, request: Any) -> Generator[Any]:	11✔
97	def wrapper(anyio_backend: Any, request: SubRequest, **kwargs: Any) -> Any:	11✔
98	# Rebind any fixture methods to the request instance
99	if (	11✔
100	request.instance
101	and ismethod(func)
102	and type(func.__self__) is type(request.instance)
103	):
104	local_func = func.__func__.__get__(request.instance)	×
105	else:
106	local_func = func	11✔
107
108	backend_name, backend_options = extract_backend_and_options(anyio_backend)	11✔
109	if has_backend_arg:	11✔
110	kwargs["anyio_backend"] = anyio_backend	11✔
111
112	if has_request_arg:	11✔
113	kwargs["request"] = request	11✔
114
115	with get_runner(backend_name, backend_options) as runner:	11✔
116	if isasyncgenfunction(local_func):	11✔
117	yield from runner.run_asyncgen_fixture(local_func, kwargs)	11✔
118	else:
119	yield runner.run_fixture(local_func, kwargs)	11✔
120
121	# Only apply this to coroutine functions and async generator functions in requests
122	# that involve the anyio_backend fixture
123	func = fixturedef.func	11✔
124	if isasyncgenfunction(func) or iscoroutinefunction(func):	11✔
125	if "anyio_backend" in request.fixturenames:	11✔
126	fixturedef.func = wrapper	11✔
127	original_argname = fixturedef.argnames	11✔
128
129	if not (has_backend_arg := "anyio_backend" in fixturedef.argnames):	11✔
130	fixturedef.argnames += ("anyio_backend",)	11✔
131
132	if not (has_request_arg := "request" in fixturedef.argnames):	11✔
133	fixturedef.argnames += ("request",)	11✔
134
135	try:	11✔
136	return (yield)	11✔
137	finally:
138	fixturedef.func = func	11✔
139	fixturedef.argnames = original_argname	11✔
140
141	return (yield)	11✔
142
143
144	@pytest.hookimpl(tryfirst=True)	11✔
145	def pytest_pycollect_makeitem(	11✔
146	collector: pytest.Module \| pytest.Class, name: str, obj: object
147	) -> None:
148	if collector.istestfunction(obj, name):	11✔
149	inner_func = obj.hypothesis.inner_test if hasattr(obj, "hypothesis") else obj	11✔
150	if iscoroutinefunction(inner_func):	11✔
151	anyio_auto_mode = collector.config.getini("anyio_mode") == "auto"	11✔
152	marker = collector.get_closest_marker("anyio")	11✔
153	own_markers = getattr(obj, "pytestmark", ())	11✔
154	if (	11✔
155	anyio_auto_mode
156	or marker
157	or any(marker.name == "anyio" for marker in own_markers)
158	):
159	pytest.mark.usefixtures("anyio_backend")(obj)	11✔
160
161
162	@pytest.hookimpl(tryfirst=True)	11✔
163	def pytest_pyfunc_call(pyfuncitem: Any) -> bool \| None:	11✔
164	def run_with_hypothesis(**kwargs: Any) -> None:	11✔
165	with get_runner(backend_name, backend_options) as runner:	11✔
166	runner.run_test(original_func, kwargs)	11✔
167
168	backend = pyfuncitem.funcargs.get("anyio_backend")	11✔
169	if backend:	11✔
170	backend_name, backend_options = extract_backend_and_options(backend)	11✔
171
172	if hasattr(pyfuncitem.obj, "hypothesis"):	11✔
173	# Wrap the inner test function unless it's already wrapped
174	original_func = pyfuncitem.obj.hypothesis.inner_test	11✔
175	if original_func.__qualname__ != run_with_hypothesis.__qualname__:	11✔
176	if iscoroutinefunction(original_func):	11✔
177	pyfuncitem.obj.hypothesis.inner_test = run_with_hypothesis	11✔
178
179	return None	11✔
180
181	if iscoroutinefunction(pyfuncitem.obj):	11✔
182	funcargs = pyfuncitem.funcargs	11✔
183	testargs = {arg: funcargs[arg] for arg in pyfuncitem._fixtureinfo.argnames}	11✔
184	with get_runner(backend_name, backend_options) as runner:	11✔
185	try:	11✔
186	runner.run_test(pyfuncitem.obj, testargs)	11✔
187	except ExceptionGroup as excgrp:	11✔
188	for exc in iterate_exceptions(excgrp):	11✔
189	if isinstance(exc, (Exit, KeyboardInterrupt, SystemExit)):	11✔
190	raise exc from excgrp	11✔
191
192	raise	3✔
193
194	return True	11✔
195
196	return None	11✔
197
198
199	@pytest.fixture(scope="module", params=get_all_backends())	11✔
200	def anyio_backend(request: Any) -> Any:	11✔
201	return request.param	11✔
202
203
204	@pytest.fixture	11✔
205	def anyio_backend_name(anyio_backend: Any) -> str:	11✔
206	if isinstance(anyio_backend, str):	11✔
207	return anyio_backend	11✔
208	else:
209	return anyio_backend[0]	11✔
210
211
212	@pytest.fixture	11✔
213	def anyio_backend_options(anyio_backend: Any) -> dict[str, Any]:	11✔
214	if isinstance(anyio_backend, str):	11✔
215	return {}	11✔
216	else:
217	return anyio_backend[1]	11✔
218
219
220	class FreePortFactory:	11✔
221	"""
222	Manages port generation based on specified socket kind, ensuring no duplicate
223	ports are generated.
224
225	This class provides functionality for generating available free ports on the
226	system. It is initialized with a specific socket kind and can generate ports
227	for given address families while avoiding reuse of previously generated ports.
228
229	Users should not instantiate this class directly, but use the
230	``free_tcp_port_factory`` and ``free_udp_port_factory`` fixtures instead. For simple
231	uses cases, ``free_tcp_port`` and ``free_udp_port`` can be used instead.
232	"""
233
234	def __init__(self, kind: socket.SocketKind) -> None:	11✔
235	self._kind = kind	11✔
236	self._generated = set[int]()	11✔
237
238	@property	11✔
239	def kind(self) -> socket.SocketKind:	11✔
240	"""
241	The type of socket connection (e.g., :data:`~socket.SOCK_STREAM` or
242	:data:`~socket.SOCK_DGRAM`) used to bind for checking port availability
243
244	"""
245	return self._kind	×
246
247	def __call__(self, family: socket.AddressFamily \| None = None) -> int:	11✔
248	"""
249	Return an unbound port for the given address family.
250
251	:param family: if omitted, both IPv4 and IPv6 addresses will be tried
252	:return: a port number
253
254	"""
255	if family is not None:	11✔
256	families = [family]	×
257	else:
258	families = [socket.AF_INET]	11✔
259	if socket.has_ipv6:	11✔
260	families.append(socket.AF_INET6)	11✔
261
262	while True:	8✔
263	port = 0	11✔
264	with ExitStack() as stack:	11✔
265	for family in families:	11✔
266	sock = stack.enter_context(socket.socket(family, self._kind))	11✔
267	addr = "::1" if family == socket.AF_INET6 else "127.0.0.1"	11✔
268	try:	11✔
269	sock.bind((addr, port))	11✔
270	except OSError:	×
271	break	×
272
273	if not port:	11✔
274	port = sock.getsockname()[1]	11✔
275	else:
276	if port not in self._generated:	11✔
277	self._generated.add(port)	11✔
278	return port	11✔
279
280
281	@pytest.fixture(scope="session")	11✔
282	def free_tcp_port_factory() -> FreePortFactory:	11✔
283	return FreePortFactory(socket.SOCK_STREAM)	11✔
284
285
286	@pytest.fixture(scope="session")	11✔
287	def free_udp_port_factory() -> FreePortFactory:	11✔
288	return FreePortFactory(socket.SOCK_DGRAM)	11✔
289
290
291	@pytest.fixture	11✔
292	def free_tcp_port(free_tcp_port_factory: Callable[[], int]) -> int:	11✔
293	return free_tcp_port_factory()	11✔
294
295
296	@pytest.fixture	11✔
297	def free_udp_port(free_udp_port_factory: Callable[[], int]) -> int:	11✔
298	return free_udp_port_factory()	11✔

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