def testGetRange(self):
    for (start_byte, end_byte) in [(0, 25), (5, 15), (0, 0), (25, 25)]:
        bytes_http = object()
        http = object()
        download_stream = six.StringIO()
        download = transfer.Download.FromStream(download_stream,
                                                total_size=26,
                                                auto_transfer=False)
        download.bytes_http = bytes_http
        base_url = 'https://part.one/'
        with mock.patch.object(http_wrapper, 'MakeRequest',
                               autospec=True) as make_request:
            make_request.return_value = http_wrapper.Response(
                info={
                    'content-range': 'bytes %d-%d/26' %
                                     (start_byte, end_byte),
                    'status': http_client.OK,
                },
                content=string.ascii_lowercase[start_byte:end_byte + 1],
                request_url=base_url,
            )
            request = http_wrapper.Request(url='https://part.one/')
            download.InitializeDownload(request, http=http)
            download.GetRange(start_byte, end_byte)
            self.assertEqual(1, make_request.call_count)
            received_request = make_request.call_args[0][1]
            self.assertEqual(base_url, received_request.url)
            self.assertRangeAndContentRangeCompatible(
                received_request, make_request.return_value)