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import asyncio
import contextlib
import warnings
from collections.abc import Callable
from typing import Any, Awaitable, Callable, Dict, Generator, Optional, Union
import pytest
from aiohttp.helpers import PY_37, isasyncgenfunction
from aiohttp.web import Application
from .test_utils import (
BaseTestServer,
RawTestServer,
TestClient,
TestServer,
loop_context,
setup_test_loop,
teardown_test_loop,
unused_port as _unused_port,
)
try:
import uvloop
except ImportError: # pragma: no cover
uvloop = None
try:
import tokio
except ImportError: # pragma: no cover
tokio = None
AiohttpClient = Callable[[Union[Application, BaseTestServer]], Awaitable[TestClient]]
def pytest_addoption(parser): # type: ignore[no-untyped-def]
parser.addoption(
"--aiohttp-fast",
action="store_true",
default=False,
help="run tests faster by disabling extra checks",
)
parser.addoption(
"--aiohttp-loop",
action="store",
default="pyloop",
help="run tests with specific loop: pyloop, uvloop, tokio or all",
)
parser.addoption(
"--aiohttp-enable-loop-debug",
action="store_true",
default=False,
help="enable event loop debug mode",
)
def pytest_fixture_setup(fixturedef): # type: ignore[no-untyped-def]
"""Set up pytest fixture.
Allow fixtures to be coroutines. Run coroutine fixtures in an event loop.
"""
func = fixturedef.func
if isasyncgenfunction(func):
# async generator fixture
is_async_gen = True
elif asyncio.iscoroutinefunction(func):
# regular async fixture
is_async_gen = False
else:
# not an async fixture, nothing to do
return
strip_request = False
if "request" not in fixturedef.argnames:
fixturedef.argnames += ("request",)
strip_request = True
def wrapper(*args, **kwargs): # type: ignore[no-untyped-def]
request = kwargs["request"]
if strip_request:
del kwargs["request"]
# if neither the fixture nor the test use the 'loop' fixture,
# 'getfixturevalue' will fail because the test is not parameterized
# (this can be removed someday if 'loop' is no longer parameterized)
if "loop" not in request.fixturenames:
raise Exception(
"Asynchronous fixtures must depend on the 'loop' fixture or "
"be used in tests depending from it."
)
_loop = request.getfixturevalue("loop")
if is_async_gen:
# for async generators, we need to advance the generator once,
# then advance it again in a finalizer
gen = func(*args, **kwargs)
def finalizer(): # type: ignore[no-untyped-def]
try:
return _loop.run_until_complete(gen.__anext__())
except StopAsyncIteration:
pass
request.addfinalizer(finalizer)
return _loop.run_until_complete(gen.__anext__())
else:
return _loop.run_until_complete(func(*args, **kwargs))
fixturedef.func = wrapper
@pytest.fixture
def fast(request): # type: ignore[no-untyped-def]
"""--fast config option"""
return request.config.getoption("--aiohttp-fast")
@pytest.fixture
def loop_debug(request): # type: ignore[no-untyped-def]
"""--enable-loop-debug config option"""
return request.config.getoption("--aiohttp-enable-loop-debug")
@contextlib.contextmanager
def _runtime_warning_context(): # type: ignore[no-untyped-def]
"""Context manager which checks for RuntimeWarnings.
This exists specifically to
avoid "coroutine 'X' was never awaited" warnings being missed.
If RuntimeWarnings occur in the context a RuntimeError is raised.
"""
with warnings.catch_warnings(record=True) as _warnings:
yield
rw = [
"{w.filename}:{w.lineno}:{w.message}".format(w=w)
for w in _warnings
if w.category == RuntimeWarning
]
if rw:
raise RuntimeError(
"{} Runtime Warning{},\n{}".format(
len(rw), "" if len(rw) == 1 else "s", "\n".join(rw)
)
)
@contextlib.contextmanager
def _passthrough_loop_context(loop, fast=False): # type: ignore[no-untyped-def]
"""Passthrough loop context.
Sets up and tears down a loop unless one is passed in via the loop
argument when it's passed straight through.
"""
if loop:
# loop already exists, pass it straight through
yield loop
else:
# this shadows loop_context's standard behavior
loop = setup_test_loop()
yield loop
teardown_test_loop(loop, fast=fast)
def pytest_pycollect_makeitem(collector, name, obj): # type: ignore[no-untyped-def]
"""Fix pytest collecting for coroutines."""
if collector.funcnamefilter(name) and asyncio.iscoroutinefunction(obj):
return list(collector._genfunctions(name, obj))
def pytest_pyfunc_call(pyfuncitem): # type: ignore[no-untyped-def]
"""Run coroutines in an event loop instead of a normal function call."""
fast = pyfuncitem.config.getoption("--aiohttp-fast")
if asyncio.iscoroutinefunction(pyfuncitem.function):
existing_loop = pyfuncitem.funcargs.get(
"proactor_loop"
) or pyfuncitem.funcargs.get("loop", None)
with _runtime_warning_context():
with _passthrough_loop_context(existing_loop, fast=fast) as _loop:
testargs = {
arg: pyfuncitem.funcargs[arg]
for arg in pyfuncitem._fixtureinfo.argnames
}
_loop.run_until_complete(pyfuncitem.obj(**testargs))
return True
def pytest_generate_tests(metafunc): # type: ignore[no-untyped-def]
if "loop_factory" not in metafunc.fixturenames:
return
loops = metafunc.config.option.aiohttp_loop
avail_factories = {"pyloop": asyncio.DefaultEventLoopPolicy}
if uvloop is not None: # pragma: no cover
avail_factories["uvloop"] = uvloop.EventLoopPolicy
if tokio is not None: # pragma: no cover
avail_factories["tokio"] = tokio.EventLoopPolicy
if loops == "all":
loops = "pyloop,uvloop?,tokio?"
factories = {} # type: ignore[var-annotated]
for name in loops.split(","):
required = not name.endswith("?")
name = name.strip(" ?")
if name not in avail_factories: # pragma: no cover
if required:
raise ValueError(
"Unknown loop '%s', available loops: %s"
% (name, list(factories.keys()))
)
else:
continue
factories[name] = avail_factories[name]
metafunc.parametrize(
"loop_factory", list(factories.values()), ids=list(factories.keys())
)
@pytest.fixture
def loop(loop_factory, fast, loop_debug): # type: ignore[no-untyped-def]
"""Return an instance of the event loop."""
policy = loop_factory()
asyncio.set_event_loop_policy(policy)
with loop_context(fast=fast) as _loop:
if loop_debug:
_loop.set_debug(True) # pragma: no cover
asyncio.set_event_loop(_loop)
yield _loop
@pytest.fixture
def proactor_loop(): # type: ignore[no-untyped-def]
if not PY_37:
policy = asyncio.get_event_loop_policy()
policy._loop_factory = asyncio.ProactorEventLoop # type: ignore[attr-defined]
else:
policy = asyncio.WindowsProactorEventLoopPolicy() # type: ignore[attr-defined]
asyncio.set_event_loop_policy(policy)
with loop_context(policy.new_event_loop) as _loop:
asyncio.set_event_loop(_loop)
yield _loop
@pytest.fixture
def unused_port(aiohttp_unused_port): # type: ignore[no-untyped-def] # pragma: no cover
warnings.warn(
"Deprecated, use aiohttp_unused_port fixture instead",
DeprecationWarning,
stacklevel=2,
)
return aiohttp_unused_port
@pytest.fixture
def aiohttp_unused_port(): # type: ignore[no-untyped-def]
"""Return a port that is unused on the current host."""
return _unused_port
@pytest.fixture
def aiohttp_server(loop): # type: ignore[no-untyped-def]
"""Factory to create a TestServer instance, given an app.
aiohttp_server(app, **kwargs)
"""
servers = []
async def go(app, *, port=None, **kwargs): # type: ignore[no-untyped-def]
server = TestServer(app, port=port)
await server.start_server(loop=loop, **kwargs)
servers.append(server)
return server
yield go
async def finalize() -> None:
while servers:
await servers.pop().close()
loop.run_until_complete(finalize())
@pytest.fixture
def test_server(aiohttp_server): # type: ignore[no-untyped-def] # pragma: no cover
warnings.warn(
"Deprecated, use aiohttp_server fixture instead",
DeprecationWarning,
stacklevel=2,
)
return aiohttp_server
@pytest.fixture
def aiohttp_raw_server(loop): # type: ignore[no-untyped-def]
"""Factory to create a RawTestServer instance, given a web handler.
aiohttp_raw_server(handler, **kwargs)
"""
servers = []
async def go(handler, *, port=None, **kwargs): # type: ignore[no-untyped-def]
server = RawTestServer(handler, port=port)
await server.start_server(loop=loop, **kwargs)
servers.append(server)
return server
yield go
async def finalize() -> None:
while servers:
await servers.pop().close()
loop.run_until_complete(finalize())
@pytest.fixture
def raw_test_server( # type: ignore[no-untyped-def] # pragma: no cover
aiohttp_raw_server,
):
warnings.warn(
"Deprecated, use aiohttp_raw_server fixture instead",
DeprecationWarning,
stacklevel=2,
)
return aiohttp_raw_server
@pytest.fixture
def aiohttp_client(
loop: asyncio.AbstractEventLoop,
) -> Generator[AiohttpClient, None, None]:
"""Factory to create a TestClient instance.
aiohttp_client(app, **kwargs)
aiohttp_client(server, **kwargs)
aiohttp_client(raw_server, **kwargs)
"""
clients = []
async def go(
__param: Union[Application, BaseTestServer],
*args: Any,
server_kwargs: Optional[Dict[str, Any]] = None,
**kwargs: Any
) -> TestClient:
if isinstance(__param, Callable) and not isinstance( # type: ignore[arg-type]
__param, (Application, BaseTestServer)
):
__param = __param(loop, *args, **kwargs)
kwargs = {}
else:
assert not args, "args should be empty"
if isinstance(__param, Application):
server_kwargs = server_kwargs or {}
server = TestServer(__param, loop=loop, **server_kwargs)
client = TestClient(server, loop=loop, **kwargs)
elif isinstance(__param, BaseTestServer):
client = TestClient(__param, loop=loop, **kwargs)
else:
raise ValueError("Unknown argument type: %r" % type(__param))
await client.start_server()
clients.append(client)
return client
yield go
async def finalize() -> None:
while clients:
await clients.pop().close()
loop.run_until_complete(finalize())
@pytest.fixture
def test_client(aiohttp_client): # type: ignore[no-untyped-def] # pragma: no cover
warnings.warn(
"Deprecated, use aiohttp_client fixture instead",
DeprecationWarning,
stacklevel=2,
)
return aiohttp_client
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