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from typing import Optional
from typing import Union
import pytest
from _pytest.config import Config
from _pytest.config import ExitCode
from _pytest.config.argparsing import Parser
from _pytest.fixtures import FixtureDef
from _pytest.fixtures import SubRequest
def pytest_addoption(parser: Parser) -> None:
group = parser.getgroup("debugconfig")
group.addoption(
"--setupplan",
"--setup-plan",
action="store_true",
help="show what fixtures and tests would be executed but "
"don't execute anything.",
)
@pytest.hookimpl(tryfirst=True)
def pytest_fixture_setup(
fixturedef: FixtureDef[object], request: SubRequest
) -> Optional[object]:
# Will return a dummy fixture if the setuponly option is provided.
if request.config.option.setupplan:
my_cache_key = fixturedef.cache_key(request)
fixturedef.cached_result = (None, my_cache_key, None)
return fixturedef.cached_result
return None
@pytest.hookimpl(tryfirst=True)
def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
if config.option.setupplan:
config.option.setuponly = True
config.option.setupshow = True
return None
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