Class HashKey

Lib/test/test_context.py:593–623

class HashKey:
    _crasher = None

    def __init__(self, hash, name, *, error_on_eq_to=None):
        assert hash != -1
        self.name = name
        self.hash = hash
        self.error_on_eq_to = error_on_eq_to

    def __repr__(self):
        return f'<Key name:{self.name} hash:{self.hash}>'

    def __hash__(self):
        if self._crasher is not None and self._crasher.error_on_hash:
            raise HashingError

        return self.hash

    def __eq__(self, other):
        if not isinstance(other, HashKey):
            return NotImplemented

        if self._crasher is not None and self._crasher.error_on_eq:
            raise EqError

        if self.error_on_eq_to is not None and self.error_on_eq_to is other:
            raise ValueError(f'cannot compare {self!r} to {other!r}')
        if other.error_on_eq_to is not None and other.error_on_eq_to is self:
            raise ValueError(f'cannot compare {other!r} to {self!r}')

        return (self.name, self.hash) == (other.name, other.hash)


class KeyStr(str):