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import re
from typing import Pattern, Union
from hamcrest.core.base_matcher import BaseMatcher
from hamcrest.core.description import Description
from hamcrest.core.matcher import Matcher
__author__ = "Chris Rose"
__copyright__ = "Copyright 2011 hamcrest.org"
__license__ = "BSD, see License.txt"
class StringMatchesPattern(BaseMatcher[str]):
def __init__(self, pattern) -> None:
self.pattern = pattern
def describe_to(self, description: Description) -> None:
description.append_text("a string matching '").append_text(
self.pattern.pattern
).append_text("'")
def _matches(self, item: str) -> bool:
return self.pattern.search(item) is not None
def matches_regexp(pattern: Union[str, Pattern[str]]) -> Matcher[str]:
"""Matches if object is a string containing a match for a given regular
expression.
:param pattern: The regular expression to search for.
This matcher first checks whether the evaluated object is a string. If so,
it checks if the regular expression ``pattern`` matches anywhere within the
evaluated object.
"""
if isinstance(pattern, str):
pattern = re.compile(pattern)
return StringMatchesPattern(pattern)
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