如何参数化具有多个参数的夹具

Question

我有一个灯具，我想多次使用 request.param。

@pytest.fixture
def get_settings(request):
    with mock.patch("helpers.helpers.get_settings") as mocked_settings:
        mocked_settings.return_value = Settings(
            TOKEN_KEY=request.param,      # <== Here
            TOKEN_PASSWORD=request.param) # <== And here
        yield


@pytest.fixture
def get_user():
    return User(name="Test User")

def generate_new_token(user: User) -> str:

    settings = get_settings()
    private_key = settings.TOKEN_KEY
    token_password = settings.TOKEN_PASSWORD

    if not private_key.strip():
        raise ValueError("Private key must not be empty")

我该怎么做？如果我像上面那样做（有两个 request.param），然后像这样在我的测试函数中使用它：

@pytest.mark.parametrize('get_settings, expected', [(FAKE_TOKEN_KEY, '', None), (FAKE_TOKEN_KEY, '1', None)],
                         indirect=["get_settings"])
def test_generate_new_token(get_user, get_settings, expected):
    assert generate_new_token(user=get_user) == expected

我收到这个错误：

in "parametrize" the number of names (2): ['get_settings', 'expected'] must be equal to the number of values (3)

我不确定它是否与我正在传递给测试函数的第二个夹具 (get_user) 有关。但是我该如何解决呢？

更新

None 是期望值，我把另外两个放在元组中。但在这种情况下，我得到以下错误：

test setup failed

request = <SubRequest 'get_settings' for <Function test_generate_new_token[get_settings1-None]>>

@pytest.fixture
def get_settings(request):
    with mock.patch("helpers.helpers.get_settings") as mocked_settings:
      > mocked_settings.return_value = Settings(
            DEBUG=True,
            TOKEN_KEY=request.param,  # FAKE_TOKEN_KEY,
            TOKEN_PASSWORD=request.param)

../conftest.py:76:

pydantic/env_settings.py:36: in pydantic.env_settings.BaseSettings.init ???

???

E pydantic.error_wrappers.ValidationError: 2 validation errors for Settings E TOKEN_KEY

E str type expected (type=type_error.str)

E TOKEN_PASSWORD

E str type expected (type=type_error.str)

pydantic/main.py:406: ValidationError

Answer 1

所以我需要在我的代码中做两处更改来解决问题：

1- 我必须在元组中传递参数：

@pytest.mark.parametrize('get_settings, expected', [
((FAKE_TOKEN_KEY, ''), None), 
((FAKE_TOKEN_KEY, '1'), None)
],
                         indirect=["get_settings"])

2- 我必须在夹具中传递参数索引：

@pytest.fixture
def get_settings(request):
    with mock.patch("helpers.helpers.get_settings") as mocked_settings:
        mocked_settings.return_value = Settings(
            TOKEN_KEY=request.param[0],      # <== Here I added index [0]
            TOKEN_PASSWORD=request.param[1]) # <== And here index [1]
        yield

如何参数化具有多个参数的夹具

How to parametrize a fixture with multiple parameters

python

fixtures

pytest

parametrized-testing