import pytest

from app.domain.brand_normalization import normalize_brand_slug


@pytest.mark.unit
def test_normalize_brand_slug_replaces_spaces_and_punctuation() -> None:
    assert normalize_brand_slug("  Acme Corp  ") == "acme-corp"
    assert normalize_brand_slug("Foo.Bar,Baz") == "foo-bar-baz"
    assert normalize_brand_slug("already-slug") == "already-slug"
    assert normalize_brand_slug("a  --  b") == "a-b"


@pytest.mark.unit
def test_normalize_brand_slug_empty_to_none() -> None:
    assert normalize_brand_slug("") is None
    assert normalize_brand_slug("   ") is None
    assert normalize_brand_slug("...") is None
    assert normalize_brand_slug(None) is None