import black
from click.testing import CliRunner
from pathlib import Path
import pytest
import sys

code_root = Path(__file__).parent.parent


@pytest.mark.skipif(
    sys.version_info[:2] > (3, 6),
    reason="Breaks on 3.7 at the moment, but it only needs to run under one Python version",
)
def test_black():
    runner = CliRunner()
    result = runner.invoke(
        black.main,
        [str(code_root / "tests"), str(code_root / "sqlite_utils"), "--check"],
    )
    assert result.exit_code == 0, result.output