:param match: The matcher to satisfy, or an expected value for
        :py:func:`~hamcrest.core.core.isequal.equal_to` matching.

    This matcher invokes the :py:func:`str` function on the evaluated object to
    get its length, passing the result to a given matcher for evaluation. If
    the ``match`` argument is not a matcher, it is implicitly wrapped in an
    :py:func:`~hamcrest.core.core.isequal.equal_to` matcher to check for
    equality.

    Examples::

        has_string(starts_with('foo'))
        has_string('bar')

    )