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                                                                                                                                                                                     from abc import ABCMeta, abstractmethod

from hamcrest.core.base_matcher import BaseMatcher
from hamcrest.core.description import Description

__author__ = "Jon Reid"
__copyright__ = "Copyright 2011 hamcrest.org"
__license__ = "BSD, see License.txt"


class SubstringMatcher(BaseMatcher[str], metaclass=ABCMeta):
    def __init__(self, substring) -> None:
        if not isinstance(substring, str):
            raise TypeError(self.__class__.__name__ + " requires string")
        self.substring = substring

    def describe_to(self, description: Description) -> None:
        description.append_text("a string ").append_text(self.relationship()).append_text(
            " "
        ).append_description_of(self.substring)

    @abstractmethod
    def relationship(self):
        ...