import datetime
from vigilar.detection.solar import get_sunset


def test_sunset_returns_time():
    result = get_sunset(45.0, -85.0, datetime.date(2026, 6, 21))
    assert isinstance(result, datetime.time)


def test_sunset_equator():
    result = get_sunset(0.0, 0.0, datetime.date(2026, 3, 20))
    assert 17 <= result.hour <= 19


def test_sunset_different_dates_vary():
    d1 = get_sunset(45.0, -85.0, datetime.date(2026, 3, 1))
    d2 = get_sunset(45.0, -85.0, datetime.date(2026, 9, 1))
    assert d1 != d2