typing_checks.py

"""File for checking typing issues.

This file is not executed, it is only checked by mypy to ensure that
none of the code triggers any mypy errors.
"""
import contextlib
from typing import Optional

from typing_extensions import assert_type

import pytest
from pytest import MonkeyPatch


# Issue #7488.
@pytest.mark.xfail(raises=RuntimeError)
def check_mark_xfail_raises() -> None:
    pass


# Issue #7494.
@pytest.fixture(params=[(0, 0), (1, 1)], ids=lambda x: str(x[0]))
def check_fixture_ids_callable() -> None:
    pass


# Issue #7494.
@pytest.mark.parametrize("func", [str, int], ids=lambda x: str(x.__name__))
def check_parametrize_ids_callable(func) -> None:
    pass


# Issue #10999.
def check_monkeypatch_typeddict(monkeypatch: MonkeyPatch) -> None:
    from typing import TypedDict

    class Foo(TypedDict):
        x: int
        y: float

    a: Foo = {"x": 1, "y": 3.14}
    monkeypatch.setitem(a, "x", 2)
    monkeypatch.delitem(a, "y")


def check_raises_is_a_context_manager(val: bool) -> None:
    with pytest.raises(RuntimeError) if val else contextlib.nullcontext() as excinfo:
        pass
    assert_type(excinfo, Optional[pytest.ExceptionInfo[RuntimeError]])