python-dependency-injector/tests/unit/wiring/test_fastdepends.py

import sys

from dependency_injector import containers, providers
from dependency_injector.wiring import inject, Provide
from fast_depends import Depends


class CoefficientService:
    @staticmethod
    def get_coefficient() -> float:
        return 1.2


class Container(containers.DeclarativeContainer):
    service = providers.Factory(CoefficientService)


@inject
def apply_coefficient(
    a: int,
    coefficient_provider: CoefficientService = Depends(Provide[Container.service]),
) -> float:
    return a * coefficient_provider.get_coefficient()


container = Container()
container.wire(modules=[sys.modules[__name__]])

def test_apply_coefficient():
    assert apply_coefficient(100) == 120.0