tasks/swe-next-6f59fc5cd8372ff0ed91/environment/source/tests/test_namedutils.py

from pickle import loads, dumps

import pytest

from boltons.namedutils import namedlist, namedtuple

Point = namedtuple('Point', 'x, y', rename=True)
MutablePoint = namedlist('MutablePoint', 'x, y', rename=True)


def test_namedlist():
    p = MutablePoint(x=10, y=20)

    assert p == [10, 20]
    p[0] = 11
    assert p == [11, 20]
    p.x = 12
    assert p == [12, 20]


def test_namedlist_pickle():
    p = MutablePoint(x=10, y=20)
    assert p == loads(dumps(p))


def test_namedtuple_pickle():
    p = Point(x=10, y=20)
    assert p == loads(dumps(p))


@pytest.mark.parametrize("factory", [namedtuple, namedlist])
def test_empty_field_name_raises_value_error(factory):
    # `all()` is True for the empty string, so an empty name used to pass both
    # ValueError checks and reach `name[0].isdigit()`, raising IndexError.
    with pytest.raises(ValueError):
        factory('Point', ['x', ''])


@pytest.mark.parametrize("factory", [namedtuple, namedlist])
def test_empty_type_name_raises_value_error(factory):
    with pytest.raises(ValueError):
        factory('', ['x', 'y'])


@pytest.mark.parametrize("factory", [namedtuple, namedlist])
def test_invalid_character_still_raises_value_error(factory):
    with pytest.raises(ValueError):
        factory('Point', ['x', 'y-z'])


@pytest.mark.parametrize("factory", [namedtuple, namedlist])
def test_valid_names_still_accepted(factory):
    cls = factory('Point', ['x', 'y'])
    assert cls(x=1, y=2).x == 1