"""La fabrique rend un overlay conforme au contrat, sans ouvrir de fenêtre."""
import pytest

from interface import classe_overlay_pour


def test_l_overlay_macos_declare_tout_le_contrat():
    classe = classe_overlay_pour("darwin")
    for methode in ("show", "hide", "set_level", "set_status", "rearmer_garde"):
        assert callable(getattr(classe, methode, None)), f"{methode} manque"


def test_une_plateforme_inconnue_est_refusee_clairement():
    with pytest.raises(NotImplementedError) as e:
        classe_overlay_pour("haiku-os")
    assert "haiku-os" in str(e.value)