"""OUI lookup tests."""
from esp32_web.utils.oui import _normalize_mac, lookup_vendor


def test_normalize_mac():
    """Test MAC normalization."""
    assert _normalize_mac('aa:bb:cc:dd:ee:ff') == 'AABBCC'
    assert _normalize_mac('AA-BB-CC-DD-EE-FF') == 'AABBCC'
    assert _normalize_mac('aabbccddeeff') == 'AABBCC'
    assert _normalize_mac('short') == ''


def test_lookup_vendor_no_db():
    """Test vendor lookup without database."""
    # Should return None when no database loaded
    result = lookup_vendor('aa:bb:cc:dd:ee:ff')
    # Result depends on whether OUI db exists
    assert result is None or isinstance(result, str)