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from dataclasses import dataclass
from operator import attrgetter
from typing import Optional
import pytest
@dataclass
class LazyFixtureWrapper:
name: str
@property
def fixture_name(self) -> str:
return self.name.split(".", maxsplit=1)[0]
def _get_attr(self, fixture) -> Optional[str]:
splitted = self.name.split(".", maxsplit=1)
if len(splitted) == 1:
return fixture
return attrgetter(splitted[1])(fixture)
def __repr__(self) -> str:
return self.name
def load_fixture(self, request: pytest.FixtureRequest):
return self._get_attr(request.getfixturevalue(self.fixture_name))
def __hash__(self) -> int:
return hash(self.name)
def lf(name: str) -> LazyFixtureWrapper:
"""lf is a lazy fixture."""
return LazyFixtureWrapper(name)
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