def test_multipleRangeRequestWithRangeOverlappingEnd(self):
        """
        The response to a request for multiple bytes ranges is a MIME-ish
        multipart response, even when one of the ranged falls off the end of
        the resource.
        """
        startEnds = [(0, 2), (40, len(self.payload) + 10)]
        rangeHeaderValue = b','.join([networkString("%s-%s" % (s,e)) for (s, e) in startEnds])
        self.request.requestHeaders.addRawHeader(b'range',
                                                 b'bytes=' + rangeHeaderValue)
        self.resource.render(self.request)
        self.assertEqual(self.request.responseCode, http.PARTIAL_CONTENT)
        boundary = re.match(
            b'^multipart/byteranges; boundary="(.*)"$',
            self.request.responseHeaders.getRawHeaders(b'content-type')[0]).group(1)
        parts = self.parseMultipartBody(b''.join(self.request.written), boundary)
        self.assertEqual(len(startEnds), len(parts))
        for part, (s, e) in zip(parts, startEnds):
            self.assertEqual(networkString(self.resource.type),
                             part[b'contentType'])
            start, end, size = part[b'contentRange']
            self.assertEqual(int(start), s)
            self.assertEqual(int(end), min(e, self.resource.getFileSize()-1))
            self.assertEqual(int(size), self.resource.getFileSize())
            self.assertEqual(self.payload[s:e+1], part[b'body'])

        The response to a request for multiple bytes ranges is a MIME-ish
        multipart response, even when one of the ranged falls off the end of
        the resource.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/test/test_static.py