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
def pytest_fixture_setup(fixturedef): # type: ignore
"""
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
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
try:
return _loop.run_until_complete(gen.__anext__())
except StopAsyncIteration: # NOQA
pass
request.addfinalizer(finalizer)
return _loop.run_until_complete(gen.__anext__())
else:
return _loop.run_until_complete(func(*args, **kwargs))
fixturedef.func = wrapper
