'Testing the tracker reply alert in LibtorrentDownloadImpl'

def test_tracker_reply_alert(self):

    mock_alert = MockObject()
    mock_alert.url = 'http://google.com'
    mock_alert.num_peers = 42
    self.libtorrent_download_impl.on_tracker_reply_alert(mock_alert)
    self.assertEqual(self.libtorrent_download_impl.tracker_status['http://google.com'], [42, 'Working'])
