Anything and Something fixtures for pytest

If you ever had to ignore a certain part of an assertion, you would end up with this.

import pytest


@pytest.mark.parametrize(
    "obj",
    [
        "string",
        123,
        123.1,
        True,
        False,
        [],
        {},
        (),
        object,
        object(),
        type,
        type(None),
        None,
    ],
)
def test_anything(obj, Anything):
    assert obj == Anything


@pytest.mark.parametrize(
    "obj",
    [
        "string",
        123,
        123.1,
        True,
        False,
        [],
        {},
        (),
        object,
        object(),
        type,
        type(None),
    ],
)
def test_something(obj, Something):
    assert obj == Something


def test_nothing(Something):
    assert None != Something


def test_something_special(Something):
    assert object() == Something(lambda x: isinstance(x, object))