How to use the aioresponses.compat.stream_reader_factory function in aioresponses

# We need to initialize headers manually
        _headers = CIMultiDict({hdrs.CONTENT_TYPE: content_type})
        if headers:
            _headers.update(headers)
        raw_headers = self._build_raw_headers(_headers)
        resp = response_class(method, url, **kwargs)
        if AIOHTTP_VERSION >= StrictVersion('3.3.0'):
            # Reified attributes
            resp._headers = _headers
            resp._raw_headers = raw_headers
        else:
            resp.headers = _headers
            resp.raw_headers = raw_headers
        resp.status = status
        resp.reason = reason
        resp.content = stream_reader_factory(loop)
        resp.content.feed_data(body)
        resp.content.feed_eof()
        return resp