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import pytest
from datafusion import SessionContext, Worker, WorkerQueryContext


def test_create_worker():
    worker = Worker()

    assert worker.with_version("local") is worker
    assert worker.with_max_message_size(1024) is worker


def test_create_worker_with_callable_session_builder():
    def build_session_state(context: WorkerQueryContext) -> SessionContext:
        return context.session_context()

    worker = Worker.from_session_builder(build_session_state)

    assert isinstance(worker, Worker)


def test_worker_session_builder_requires_callable():
    class InvalidWorkerSessionBuilder:
        build_session_state = "not-callable"

    with pytest.raises(TypeError, match="callable"):
        Worker.from_session_builder(InvalidWorkerSessionBuilder())


def test_worker_serve_rejects_invalid_bind_address():
    with pytest.raises(Exception, match="invalid worker bind address"):
        Worker().serve("not-an-address", 50051)