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145 lines
5.0 KiB
145 lines
5.0 KiB
from contextlib import contextmanager
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from inspect import isasyncgenfunction, iscoroutinefunction
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from typing import TYPE_CHECKING, Any, Dict, Generator, Optional, Tuple, cast
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import pytest
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import sniffio
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from _pytest.fixtures import FixtureRequest
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from ._core._eventloop import get_all_backends, get_asynclib
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from .abc import TestRunner
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if TYPE_CHECKING:
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from _pytest.config import Config
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_current_runner: Optional[TestRunner] = None
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def extract_backend_and_options(backend: object) -> Tuple[str, Dict[str, Any]]:
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if isinstance(backend, str):
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return backend, {}
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elif isinstance(backend, tuple) and len(backend) == 2:
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if isinstance(backend[0], str) and isinstance(backend[1], dict):
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return cast(Tuple[str, Dict[str, Any]], backend)
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raise TypeError("anyio_backend must be either a string or tuple of (string, dict)")
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@contextmanager
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def get_runner(
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backend_name: str, backend_options: Dict[str, Any]
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) -> Generator[TestRunner, object, None]:
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global _current_runner
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if _current_runner:
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yield _current_runner
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return
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asynclib = get_asynclib(backend_name)
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token = None
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if sniffio.current_async_library_cvar.get(None) is None:
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# Since we're in control of the event loop, we can cache the name of the async library
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token = sniffio.current_async_library_cvar.set(backend_name)
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try:
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backend_options = backend_options or {}
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with asynclib.TestRunner(**backend_options) as runner:
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_current_runner = runner
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yield runner
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finally:
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_current_runner = None
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if token:
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sniffio.current_async_library_cvar.reset(token)
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def pytest_configure(config: "Config") -> None:
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config.addinivalue_line(
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"markers",
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"anyio: mark the (coroutine function) test to be run "
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"asynchronously via anyio.",
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)
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def pytest_fixture_setup(fixturedef: Any, request: FixtureRequest) -> None:
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def wrapper(*args, anyio_backend, **kwargs): # type: ignore[no-untyped-def]
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backend_name, backend_options = extract_backend_and_options(anyio_backend)
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if has_backend_arg:
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kwargs["anyio_backend"] = anyio_backend
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with get_runner(backend_name, backend_options) as runner:
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if isasyncgenfunction(func):
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yield from runner.run_asyncgen_fixture(func, kwargs)
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else:
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yield runner.run_fixture(func, kwargs)
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# Only apply this to coroutine functions and async generator functions in requests that involve
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# the anyio_backend fixture
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func = fixturedef.func
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if isasyncgenfunction(func) or iscoroutinefunction(func):
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if "anyio_backend" in request.fixturenames:
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has_backend_arg = "anyio_backend" in fixturedef.argnames
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fixturedef.func = wrapper
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if not has_backend_arg:
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fixturedef.argnames += ("anyio_backend",)
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@pytest.hookimpl(tryfirst=True)
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def pytest_pycollect_makeitem(collector: Any, name: Any, obj: Any) -> None:
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if collector.istestfunction(obj, name):
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inner_func = obj.hypothesis.inner_test if hasattr(obj, "hypothesis") else obj
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if iscoroutinefunction(inner_func):
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marker = collector.get_closest_marker("anyio")
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own_markers = getattr(obj, "pytestmark", ())
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if marker or any(marker.name == "anyio" for marker in own_markers):
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pytest.mark.usefixtures("anyio_backend")(obj)
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@pytest.hookimpl(tryfirst=True)
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def pytest_pyfunc_call(pyfuncitem: Any) -> Optional[bool]:
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def run_with_hypothesis(**kwargs: Any) -> None:
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with get_runner(backend_name, backend_options) as runner:
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runner.run_test(original_func, kwargs)
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backend = pyfuncitem.funcargs.get("anyio_backend")
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if backend:
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backend_name, backend_options = extract_backend_and_options(backend)
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if hasattr(pyfuncitem.obj, "hypothesis"):
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# Wrap the inner test function unless it's already wrapped
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original_func = pyfuncitem.obj.hypothesis.inner_test
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if original_func.__qualname__ != run_with_hypothesis.__qualname__:
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if iscoroutinefunction(original_func):
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pyfuncitem.obj.hypothesis.inner_test = run_with_hypothesis
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return None
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if iscoroutinefunction(pyfuncitem.obj):
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funcargs = pyfuncitem.funcargs
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testargs = {arg: funcargs[arg] for arg in pyfuncitem._fixtureinfo.argnames}
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with get_runner(backend_name, backend_options) as runner:
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runner.run_test(pyfuncitem.obj, testargs)
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return True
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return None
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@pytest.fixture(params=get_all_backends())
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def anyio_backend(request: Any) -> Any:
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return request.param
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@pytest.fixture
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def anyio_backend_name(anyio_backend: Any) -> str:
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if isinstance(anyio_backend, str):
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return anyio_backend
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else:
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return anyio_backend[0]
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@pytest.fixture
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def anyio_backend_options(anyio_backend: Any) -> Dict[str, Any]:
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if isinstance(anyio_backend, str):
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return {}
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else:
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return anyio_backend[1]
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