如何在烧瓶应用程序中测试我的依赖注入？

Question

我一直在（单元）测试依赖性注射的（单元）测试上，他们正在使用pytest固定装置，并且我正在尝试在烧瓶应用中复制类似的内容。这就是我的应用的样子：

# all imports

class Container(containers.DeclarativeContainer):

    wiring_config = containers.WiringConfiguration(modules=[".routes", ".scheduler"])

    config = providers.Configuration(yaml_files=["src/conf/config.yaml"])
    config.load(envs_required=True)
    s3_repository = providers.Resource(
        S3Repository, config.get("app.my_service.s3_bucket")
    )

    my_service = providers.Singleton(
        MyService, config, s3_repository
    )

我的app.py：

container = Container()
    container.init_resources()
    app = Flask(__name__)
    app.container = container
    
    # connect url rules and register error handlers
    routes.configure(app)

    # schedule and kickoff background jobs
    scheduler.schedule(app)

    # set flask configuration and logging
    app.config.from_mapping(app.container.config.get("app"))
    setup_logging(app)

    return app

my_service.py

class MyService:
    

    def __init__(self, config: dict, s3_repository: S3Repository) -> None:
        self.s3 = s3_repository
        self.config = config
   
   # other logic/methods

我的s3repository：

class S3Repository:
    def __init__(self, bucket):
        self.bucket = bucket
        

    def fetch(self, object_key, columns, filters):
    # code to fetch 

我正在尝试编写测试并工作第一次使用pytest，这就是我到目前为止的：

# TODO - re-write tests for since we're now using dependency injection
import unittest
from unittest.mock import Mock

import pytest as pytest

from src.repository.s3_repository import S3Repository
from src.service.HealthSignalService import HealthSignalService


class TestApp(unittest.TestCase):
    def something(self):
        pass


@pytest.fixture
def mock_config(mocker):
    return mocker.patch("providers.Configuration")


def test_app(mock_config):
    from src import create_app
    create_app()

当我运行时，我会看到：

  @pytest.fixture
  def mock_config(mocker):
E       fixture 'mocker' not found
>       available fixtures: cache, capfd, capfdbinary, caplog, capsys, capsysbinary, doctest_namespace, mock_config, monkeypatch, pytestconfig, record_property, record_testsuite_property, record_xml_attribute, recwarn, tmp_path, tmp_path_factory, tmpdir, tmpdir_factory
>       use 'pytest --fixtures [testpath]' for help on them.

我在做什么错？我想念什么？现在，我正在关注本教程 - https：https：// docs。 pytest.org/en/7.1.x/explanation/fixtures.html

Answer 1

您永远不会用模拟器的名称定义pytest.fixture。传递给pytest函数参数的参数必须由pytest.fixture

例如，例如

@pytest.fixture
def connection():
    ...

@pytest.fixture
def database(connection):
    ...

def test_somecase(connection, database):
    ...

pytest.fixture已经定义的那些参数