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|
from __future__ import annotations
from textwrap import dedent
from pytest import Pytester
def test_asyncio_mark_provides_function_scoped_loop_strict_mode(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
pytestmark = pytest.mark.asyncio
loop: asyncio.AbstractEventLoop
async def test_remember_loop():
global loop
loop = asyncio.get_running_loop()
async def test_does_not_run_in_same_loop():
global loop
assert asyncio.get_running_loop() is not loop
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_loop_scope_function_provides_function_scoped_event_loop(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
pytestmark = pytest.mark.asyncio(loop_scope="function")
loop: asyncio.AbstractEventLoop
async def test_remember_loop():
global loop
loop = asyncio.get_running_loop()
async def test_does_not_run_in_same_loop():
global loop
assert asyncio.get_running_loop() is not loop
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_raises_when_scope_and_loop_scope_arguments_are_present(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import pytest
@pytest.mark.asyncio(scope="function", loop_scope="function")
async def test_raises():
...
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(errors=1)
def test_warns_when_scope_argument_is_present(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import pytest
@pytest.mark.asyncio(scope="function")
async def test_warns():
...
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict")
result.assert_outcomes(passed=1, warnings=2)
result.stdout.fnmatch_lines("*DeprecationWarning*")
def test_function_scope_supports_explicit_event_loop_fixture_request(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import pytest
pytestmark = pytest.mark.asyncio
async def test_remember_loop(event_loop):
pass
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W default")
result.assert_outcomes(passed=1, warnings=1)
result.stdout.fnmatch_lines(
'*is asynchronous and explicitly requests the "event_loop" fixture*'
)
def test_asyncio_mark_respects_the_loop_policy(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
pytestmark = pytest.mark.asyncio
class CustomEventLoopPolicy(asyncio.DefaultEventLoopPolicy):
pass
@pytest.fixture(scope="function")
def event_loop_policy():
return CustomEventLoopPolicy()
async def test_uses_custom_event_loop_policy():
assert isinstance(
asyncio.get_event_loop_policy(),
CustomEventLoopPolicy,
)
"""
),
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
def test_asyncio_mark_respects_parametrized_loop_policies(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
pytestmark = pytest.mark.asyncio
class CustomEventLoopPolicy(asyncio.DefaultEventLoopPolicy):
pass
@pytest.fixture(
scope="module",
params=[
CustomEventLoopPolicy(),
CustomEventLoopPolicy(),
],
)
def event_loop_policy(request):
return request.param
async def test_parametrized_loop():
assert isinstance(
asyncio.get_event_loop_policy(),
CustomEventLoopPolicy,
)
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_asyncio_mark_provides_function_scoped_loop_to_fixtures(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
import pytest_asyncio
pytestmark = pytest.mark.asyncio
loop: asyncio.AbstractEventLoop
@pytest_asyncio.fixture
async def my_fixture():
global loop
loop = asyncio.get_running_loop()
async def test_runs_is_same_loop_as_fixture(my_fixture):
global loop
assert asyncio.get_running_loop() is loop
"""
)
)
result = pytester.runpytest_subprocess("--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(
dedent(
"""\
import pytest
import asyncio
@pytest.fixture
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
# 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(
dedent(
"""\
import pytest
@pytest.mark.asyncio
async def test_anything():
pass
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict")
result.assert_outcomes(warnings=0, passed=1)
def test_asyncio_mark_does_not_duplicate_other_marks_in_auto_mode(
pytester: Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makeconftest(
dedent(
"""\
def pytest_configure(config):
config.addinivalue_line(
"markers", "dummy_marker: mark used for testing purposes"
)
"""
)
)
pytester.makepyfile(
dedent(
"""\
import pytest
@pytest.mark.dummy_marker
async def test_markers_not_duplicated(request):
markers = []
for node, marker in request.node.iter_markers_with_node():
markers.append(marker)
assert len(markers) == 2
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=auto")
result.assert_outcomes(warnings=0, passed=1)
|
