"""Database 构造与 from_config 的纯 API 校验（无 IO）。"""

import pytest

from chongming_database import Database


async def test_constructor_requires_exactly_one_arg():
    # 两个都不给
    with pytest.raises(ValueError):
        Database()
    # 两个都给
    with pytest.raises(ValueError):
        Database("x.db", url="postgresql+asyncpg://localhost/db")


async def test_from_config_sqlite_requires_path():
    with pytest.raises(ValueError):
        Database.from_config({"type": "sqlite"})


async def test_from_config_postgres_requires_url():
    with pytest.raises(ValueError):
        Database.from_config({"type": "postgresql"})


async def test_from_config_unsupported_type():
    with pytest.raises(NotImplementedError):
        Database.from_config({"type": "mysql", "url": "mysql://localhost/db"})


async def test_postgres_url_normalized_to_asyncpg():
    db = Database.from_url("postgresql://user:pwd@127.0.0.1:5432/mydb")
    assert db._build_url() == "postgresql+asyncpg://user:pwd@127.0.0.1:5432/mydb"


async def test_explicit_driver_url_untouched():
    db = Database(url="postgresql+asyncpg://user:pwd@127.0.0.1:5432/mydb")
    assert db._build_url() == "postgresql+asyncpg://user:pwd@127.0.0.1:5432/mydb"