from catopt_query.adapters import Adapter, VendorPlan
from catopt_query.protocol import CanonicalPlan


def test_adapter_to_canonical_basic():
    vp = VendorPlan(shard_id="shard-1", projection=["x", "y"], predicates=["x>5"], price=2.5)
    adapter = Adapter()
    canon = adapter.to_canonical(vp)
    assert isinstance(canon, CanonicalPlan)
    assert canon.projection == ["x", "y"]
    assert canon.predicates == ["x>5"]
    assert canon.estimated_cost == 2.5