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Edit File: match_equality.py

from typing import Any

from hamcrest.core.helpers.wrap_matcher import wrap_matcher
from hamcrest.core.matcher import Matcher
from hamcrest.core.string_description import tostring

__author__ = "Chris Rose"
__copyright__ = "Copyright 2011 hamcrest.org"
__license__ = "BSD, see License.txt"
__unittest = True

class EqualityWrapper(object):
    def __init__(self, matcher: Matcher) -> None:
        self.matcher = matcher

def __eq__(self, obj: Any) -> bool:
        return self.matcher.matches(obj)

def __str__(self) -> str:
        return repr(self)

def __repr__(self) -> str:
        return tostring(self.matcher)

def match_equality(matcher: Matcher) -> EqualityWrapper:
    """Wraps a matcher to define equality in terms of satisfying the matcher.

``match_equality`` allows Hamcrest matchers to be used in libraries that
    are not Hamcrest-aware. They might use the equality operator::

assert match_equality(matcher) == object

Or they might provide a method that uses equality for its test::

library.method_that_tests_eq(match_equality(matcher))

One concrete example is integrating with the ``assert_called_with`` methods
    in Michael Foord's `mock <http://www.voidspace.org.uk/python/mock/>`_
    library.

"""
    return EqualityWrapper(wrap_matcher(matcher))