Function test_parser_const_with_default_none

tests/config/cli/test_parser.py:17–31

(monkeypatch: MonkeyPatch)

def test_parser_const_with_default_none(monkeypatch: MonkeyPatch) -> None:
    monkeypatch.setenv("TOX_ALPHA", "2")
    parser = ToxParser.base()
    parser.add_argument(
        "-a",
        dest="alpha",
        action="store_const",
        const=1,
        default=None,
        help="sum the integers (default: find the max)",
    )
    parser.fix_defaults()

    result = parser.parse_args([])
    assert result.alpha == 2


@pytest.mark.parametrize("is_atty", [True, False])