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|
"""
Regression test for https://github.com/pytest-dev/pytest-asyncio/issues/127:
contextvars were not properly maintained among fixtures and tests.
"""
from __future__ import annotations
import sys
from textwrap import dedent
import pytest
from pytest import Pytester
_prelude = dedent(
"""
import pytest
import pytest_asyncio
from contextlib import contextmanager
from contextvars import ContextVar
_context_var = ContextVar("context_var")
@contextmanager
def context_var_manager(value):
token = _context_var.set(value)
try:
yield
finally:
_context_var.reset(token)
"""
)
def test_var_from_sync_generator_propagates_to_async(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
_prelude
+ dedent(
"""
@pytest.fixture
def var_fixture():
with context_var_manager("value"):
yield
@pytest_asyncio.fixture
async def check_var_fixture(var_fixture):
assert _context_var.get() == "value"
@pytest.mark.asyncio
async def test(check_var_fixture):
assert _context_var.get() == "value"
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
@pytest.mark.xfail(
sys.version_info < (3, 11),
reason="requires asyncio Task context support",
strict=True,
)
def test_var_from_async_generator_propagates_to_sync(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
_prelude
+ dedent(
"""
@pytest_asyncio.fixture
async def var_fixture():
with context_var_manager("value"):
yield
@pytest.fixture
def check_var_fixture(var_fixture):
assert _context_var.get() == "value"
@pytest.mark.asyncio
async def test(check_var_fixture):
assert _context_var.get() == "value"
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
@pytest.mark.xfail(
sys.version_info < (3, 11),
reason="requires asyncio Task context support",
strict=True,
)
def test_var_from_async_fixture_propagates_to_sync(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
_prelude
+ dedent(
"""
@pytest_asyncio.fixture
async def var_fixture():
_context_var.set("value")
# Rely on async fixture teardown to reset the context var.
@pytest.fixture
def check_var_fixture(var_fixture):
assert _context_var.get() == "value"
def test(check_var_fixture):
assert _context_var.get() == "value"
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
@pytest.mark.xfail(
sys.version_info < (3, 11),
reason="requires asyncio Task context support",
strict=True,
)
def test_var_from_generator_reset_before_previous_fixture_cleanup(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
_prelude
+ dedent(
"""
@pytest_asyncio.fixture
async def no_var_fixture():
with pytest.raises(LookupError):
_context_var.get()
yield
with pytest.raises(LookupError):
_context_var.get()
@pytest_asyncio.fixture
async def var_fixture(no_var_fixture):
with context_var_manager("value"):
yield
@pytest.mark.asyncio
async def test(var_fixture):
assert _context_var.get() == "value"
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
@pytest.mark.xfail(
sys.version_info < (3, 11),
reason="requires asyncio Task context support",
strict=True,
)
def test_var_from_fixture_reset_before_previous_fixture_cleanup(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
_prelude
+ dedent(
"""
@pytest_asyncio.fixture
async def no_var_fixture():
with pytest.raises(LookupError):
_context_var.get()
yield
with pytest.raises(LookupError):
_context_var.get()
@pytest_asyncio.fixture
async def var_fixture(no_var_fixture):
_context_var.set("value")
# Rely on async fixture teardown to reset the context var.
@pytest.mark.asyncio
async def test(var_fixture):
assert _context_var.get() == "value"
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
@pytest.mark.xfail(
sys.version_info < (3, 11),
reason="requires asyncio Task context support",
strict=True,
)
def test_var_previous_value_restored_after_fixture(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
_prelude
+ dedent(
"""
@pytest_asyncio.fixture
async def var_fixture_1():
with context_var_manager("value1"):
yield
assert _context_var.get() == "value1"
@pytest_asyncio.fixture
async def var_fixture_2(var_fixture_1):
with context_var_manager("value2"):
yield
assert _context_var.get() == "value2"
@pytest.mark.asyncio
async def test(var_fixture_2):
assert _context_var.get() == "value2"
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
@pytest.mark.xfail(
sys.version_info < (3, 11),
reason="requires asyncio Task context support",
strict=True,
)
def test_var_set_to_existing_value_ok(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
_prelude
+ dedent(
"""
@pytest_asyncio.fixture
async def var_fixture():
with context_var_manager("value"):
yield
@pytest_asyncio.fixture
async def same_var_fixture(var_fixture):
with context_var_manager(_context_var.get()):
yield
@pytest.mark.asyncio
async def test(same_var_fixture):
assert _context_var.get() == "value"
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
|
