import pytest

from fin_hub.attribution import ClientAttribution, optional_attribution


def test_client_attribution_key_is_stable():
    attribution = ClientAttribution(" acme ", "portal", "prod-01")
    assert attribution.key == "client:acme|app:portal|instance:prod-01"


def test_empty_attribution_is_explicitly_unattributed():
    assert optional_attribution(None, None, None) is None
    assert optional_attribution("", "", "") is None


@pytest.mark.parametrize("invalid", ["has space", "has/slash", "", "x" * 129])
def test_client_attribution_rejects_unsafe_parts(invalid: str):
    with pytest.raises(ValueError):
        ClientAttribution(invalid, "portal", "prod-01")