"""Spike: 验证 vnpy 4.4.0 数据库接口。无 NAS 数据时可 skip。"""
import datetime
import pytest
from vnpy.trader.database import get_database
from vnpy.trader.constant import Interval, Exchange


def test_vnpy44_database_interface():
    """验证 vnpy 4.4.0 数据库接口存在性和签名."""
    db = get_database()
    assert hasattr(db, "load_bar_data")
    assert hasattr(db, "save_bar_data")

    # 测试 load_bar_data 签名
    bars = db.load_bar_data(
        symbol="600000",
        exchange=Exchange.SSE,
        interval=Interval.DAILY,
        start=datetime.datetime(2026, 1, 1),
        end=datetime.datetime(2026, 6, 30),
    )
    assert isinstance(bars, list)