from packages.domain import move_points
from packages.domain.expiry import expiry_ms_from_ymd


def test_move_points_signed():
    assert move_points(3600.0, 3500.0) == 100.0
    assert move_points(3400.0, 3500.0) == -100.0
    assert abs(move_points(3400.0, 3500.0)) == 100.0


def test_expiry_ms_utc8():
    # 260731 → 2026-07-31 08:00 UTC
    ms = expiry_ms_from_ymd("260731")
    from datetime import datetime, timezone

    dt = datetime.fromtimestamp(ms / 1000, tz=timezone.utc)
    assert dt.year == 2026 and dt.month == 7 and dt.day == 31
    assert dt.hour == 8 and dt.minute == 0