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|
from __future__ import annotations
from textwrap import dedent
from pytest import Pytester
def test_asyncio_mark_provides_package_scoped_loop_strict_mode(pytester: Pytester):
package_name = pytester.path.name
subpackage_name = "subpkg"
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
__init__="",
shared_module=dedent(
"""\
import asyncio
loop: asyncio.AbstractEventLoop = None
"""
),
test_module_one=dedent(
f"""\
import asyncio
import pytest
from {package_name} import shared_module
@pytest.mark.asyncio(loop_scope="package")
async def test_remember_loop():
shared_module.loop = asyncio.get_running_loop()
"""
),
test_module_two=dedent(
f"""\
import asyncio
import pytest
from {package_name} import shared_module
pytestmark = pytest.mark.asyncio(loop_scope="package")
async def test_this_runs_in_same_loop():
assert asyncio.get_running_loop() is shared_module.loop
class TestClassA:
async def test_this_runs_in_same_loop(self):
assert asyncio.get_running_loop() is shared_module.loop
"""
),
)
subpkg = pytester.mkpydir(subpackage_name)
subpkg.joinpath("__init__.py").touch()
subpkg.joinpath("test_subpkg.py").write_text(
dedent(
f"""\
import asyncio
import pytest
from {package_name} import shared_module
pytestmark = pytest.mark.asyncio(loop_scope="package")
async def test_subpackage_runs_in_different_loop():
assert asyncio.get_running_loop() is not shared_module.loop
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=4)
def test_raise_when_event_loop_fixture_is_requested_in_addition_to_scoped_loop(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
__init__="",
test_raises=dedent(
"""\
import asyncio
import pytest
@pytest.mark.asyncio(loop_scope="package")
async def test_remember_loop(event_loop):
pass
"""
),
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(errors=1)
result.stdout.fnmatch_lines("*MultipleEventLoopsRequestedError: *")
def test_asyncio_mark_respects_the_loop_policy(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
__init__="",
conftest=dedent(
"""\
import pytest
from .custom_policy import CustomEventLoopPolicy
@pytest.fixture(scope="package")
def event_loop_policy():
return CustomEventLoopPolicy()
"""
),
custom_policy=dedent(
"""\
import asyncio
class CustomEventLoopPolicy(asyncio.DefaultEventLoopPolicy):
pass
"""
),
test_uses_custom_policy=dedent(
"""\
import asyncio
import pytest
from .custom_policy import CustomEventLoopPolicy
pytestmark = pytest.mark.asyncio(loop_scope="package")
async def test_uses_custom_event_loop_policy():
assert isinstance(
asyncio.get_event_loop_policy(),
CustomEventLoopPolicy,
)
"""
),
test_also_uses_custom_policy=dedent(
"""\
import asyncio
import pytest
from .custom_policy import CustomEventLoopPolicy
pytestmark = pytest.mark.asyncio(loop_scope="package")
async def test_also_uses_custom_event_loop_policy():
assert isinstance(
asyncio.get_event_loop_policy(),
CustomEventLoopPolicy,
)
"""
),
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_asyncio_mark_respects_parametrized_loop_policies(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
__init__="",
test_parametrization=dedent(
"""\
import asyncio
import pytest
pytestmark = pytest.mark.asyncio(loop_scope="package")
@pytest.fixture(
scope="package",
params=[
asyncio.DefaultEventLoopPolicy(),
asyncio.DefaultEventLoopPolicy(),
],
)
def event_loop_policy(request):
return request.param
async def test_parametrized_loop():
pass
"""
),
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_asyncio_mark_provides_package_scoped_loop_to_fixtures(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
package_name = pytester.path.name
pytester.makepyfile(
__init__="",
conftest=dedent(
f"""\
import asyncio
import pytest_asyncio
from {package_name} import shared_module
@pytest_asyncio.fixture(loop_scope="package", scope="package")
async def my_fixture():
shared_module.loop = asyncio.get_running_loop()
"""
),
shared_module=dedent(
"""\
import asyncio
loop: asyncio.AbstractEventLoop = None
"""
),
test_fixture_runs_in_scoped_loop=dedent(
f"""\
import asyncio
import pytest
import pytest_asyncio
from {package_name} import shared_module
pytestmark = pytest.mark.asyncio(loop_scope="package")
async def test_runs_in_same_loop_as_fixture(my_fixture):
assert asyncio.get_running_loop() is shared_module.loop
"""
),
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
def test_asyncio_mark_allows_combining_package_scoped_fixture_with_module_scoped_test(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
__init__="",
test_mixed_scopes=dedent(
"""\
import asyncio
import pytest
import pytest_asyncio
loop: asyncio.AbstractEventLoop
@pytest_asyncio.fixture(loop_scope="package", scope="package")
async def async_fixture():
global loop
loop = asyncio.get_running_loop()
@pytest.mark.asyncio(loop_scope="module")
async def test_runs_in_different_loop_as_fixture(async_fixture):
global loop
assert asyncio.get_running_loop() is not loop
"""
),
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
def test_asyncio_mark_allows_combining_package_scoped_fixture_with_class_scoped_test(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
__init__="",
test_mixed_scopes=dedent(
"""\
import asyncio
import pytest
import pytest_asyncio
loop: asyncio.AbstractEventLoop
@pytest_asyncio.fixture(loop_scope="package", scope="package")
async def async_fixture():
global loop
loop = asyncio.get_running_loop()
@pytest.mark.asyncio(loop_scope="class")
class TestMixedScopes:
async def test_runs_in_different_loop_as_fixture(self, async_fixture):
global loop
assert asyncio.get_running_loop() is not loop
"""
),
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
def test_asyncio_mark_allows_combining_package_scoped_fixture_with_function_scoped_test(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
__init__="",
test_mixed_scopes=dedent(
"""\
import asyncio
import pytest
import pytest_asyncio
loop: asyncio.AbstractEventLoop
@pytest_asyncio.fixture(loop_scope="package", scope="package")
async def async_fixture():
global loop
loop = asyncio.get_running_loop()
@pytest.mark.asyncio
async def test_runs_in_different_loop_as_fixture(async_fixture):
global loop
assert asyncio.get_running_loop() is not loop
"""
),
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
def test_asyncio_mark_handles_missing_event_loop_triggered_by_fixture(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
__init__="",
test_loop_is_none=dedent(
"""\
import pytest
import asyncio
@pytest.fixture(scope="package")
def sets_event_loop_to_none():
# asyncio.run() creates a new event loop without closing the existing
# one. For any test, but the first one, this leads to a ResourceWarning
# when the discarded loop is destroyed by the garbage collector.
# We close the current loop to avoid this
try:
asyncio.get_event_loop().close()
except RuntimeError:
pass
return asyncio.run(asyncio.sleep(0))
# asyncio.run() sets the current event loop to None when finished
@pytest.mark.asyncio(loop_scope="package")
# parametrization may impact fixture ordering
@pytest.mark.parametrize("n", (0, 1))
async def test_does_not_fail(sets_event_loop_to_none, n):
pass
"""
),
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_standalone_test_does_not_trigger_warning_about_no_current_event_loop_being_set(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
__init__="",
test_module=dedent(
"""\
import pytest
@pytest.mark.asyncio(loop_scope="package")
async def test_anything():
pass
"""
),
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict")
result.assert_outcomes(warnings=0, passed=1)
|
