import inspect
import subprocess

import pytest

from l4d2host.process import run_command


def test_callbacks_receive_lines() -> None:
    out: list[str] = []
    err: list[str] = []
    run_command(
        ["python3", "-c", "import sys; print('ok'); print('warn', file=sys.stderr)"],
        on_stdout=out.append,
        on_stderr=err.append,
    )
    assert out == ["ok"]
    assert err == ["warn"]


def test_nonzero_exit_raises() -> None:
    with pytest.raises(subprocess.CalledProcessError):
        run_command(["python3", "-c", "import sys; sys.exit(7)"])


def test_run_command_avoids_runtime_unsafe_nested_annotations() -> None:
    source = inspect.getsource(run_command)
    assert "subprocess.Popen[str].stdout" not in source