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from typing import Any, Optional
from hamcrest.core.base_matcher import BaseMatcher
from hamcrest.core.description import Description
from hamcrest.core.matcher import Matcher
from .isnot import is_not
__author__ = "Jon Reid"
__copyright__ = "Copyright 2011 hamcrest.org"
__license__ = "BSD, see License.txt"
class IsNone(BaseMatcher[Optional[Any]]):
def _matches(self, item: Any) -> bool:
return item is None
def describe_to(self, description: Description) -> None:
description.append_text("None")
def none() -> Matcher[Optional[Any]]:
"""Matches if object is ``None``."""
return IsNone()
def not_none() -> Matcher[Optional[Any]]:
"""Matches if object is not ``None``."""
return is_not(none())