from pathlib import Path

import io

import pytest

import yaml

from pyproject_buildrequires import generate_requires

testcases = {}

with Path(__file__).parent.joinpath('testcases.yaml').open() as f:

    testcases = yaml.safe_load(f)

@pytest.mark.parametrize('case_name', testcases)

def test_data(case_name, capsys, tmp_path, monkeypatch):

    case = testcases[case_name]

    cwd = tmp_path.joinpath('cwd')

    cwd.mkdir()

    monkeypatch.chdir(cwd)

    if case.get('xfail'):

        pytest.xfail(case.get('xfail'))

    if 'pyproject.toml' in case:

        cwd.joinpath('pyproject.toml').write_text(case['pyproject.toml'])

    if 'setup.py' in case:

        cwd.joinpath('setup.py').write_text(case['setup.py'])

    try:

        generate_requires(

            case['freeze_output'],

            include_runtime=case.get('include_runtime', False),

            extras=case.get('extras', ''),

        )

    except SystemExit as e:

        assert e.code == case['result']

    except Exception as e:

        if 'except' not in case:

            raise

        assert type(e).__name__ == case['except']

    else:

        assert 0 == case['result']

        captured = capsys.readouterr()

        assert captured.out == case['expected']