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|
"""
Tests for the Hypothesis integration, which wraps async functions in a
sync shim for Hypothesis.
"""
from __future__ import annotations
from textwrap import dedent
import pytest
from hypothesis import given, strategies as st
from pytest import Pytester
def test_hypothesis_given_decorator_before_asyncio_mark(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import pytest
from hypothesis import given, strategies as st
@given(st.integers())
@pytest.mark.asyncio
async def test_mark_inner(n):
assert isinstance(n, int)
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W default")
result.assert_outcomes(passed=1)
@pytest.mark.asyncio
@given(st.integers())
async def test_mark_outer(n):
assert isinstance(n, int)
@pytest.mark.parametrize("y", [1, 2])
@given(x=st.none())
@pytest.mark.asyncio
async def test_mark_and_parametrize(x, y):
assert x is None
assert y in (1, 2)
def test_can_use_explicit_event_loop_fixture(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = module")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
from hypothesis import given
import hypothesis.strategies as st
pytest_plugins = 'pytest_asyncio'
@pytest.fixture(scope="module")
def event_loop():
loop = asyncio.get_event_loop_policy().new_event_loop()
yield loop
loop.close()
@given(st.integers())
@pytest.mark.asyncio
async def test_explicit_fixture_request(event_loop, n):
semaphore = asyncio.Semaphore(value=0)
event_loop.call_soon(semaphore.release)
await semaphore.acquire()
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict", "-W default")
result.assert_outcomes(passed=1, warnings=2)
result.stdout.fnmatch_lines(
[
'*is asynchronous and explicitly requests the "event_loop" fixture*',
"*event_loop fixture provided by pytest-asyncio has been redefined*",
]
)
def test_async_auto_marked(pytester: Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
from hypothesis import given
import hypothesis.strategies as st
pytest_plugins = 'pytest_asyncio'
@given(n=st.integers())
async def test_hypothesis(n: int):
assert isinstance(n, int)
"""
)
)
result = pytester.runpytest("--asyncio-mode=auto")
result.assert_outcomes(passed=1)
def test_sync_not_auto_marked(pytester: Pytester):
"""Assert that synchronous Hypothesis functions are not marked with asyncio"""
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
from hypothesis import given
import hypothesis.strategies as st
pytest_plugins = 'pytest_asyncio'
@given(n=st.integers())
def test_hypothesis(request, n: int):
markers = [marker.name for marker in request.node.own_markers]
assert "asyncio" not in markers
assert isinstance(n, int)
"""
)
)
result = pytester.runpytest("--asyncio-mode=auto")
result.assert_outcomes(passed=1)
|
