def test_get_instrument(self):
     config = SubscriptionManager(file_name)
     instmts = dict()
     for instmt_id in config.get_instmt_ids():
         instmts[instmt_id] = config.get_instrument(instmt_id)
     
     # BTCC-BTCCNY
     name = 'BTCC-BTCCNY-Restful'
     self.assertEqual(instmts[name].get_exchange_name(), 'BTCC')
     self.assertEqual(instmts[name].get_instmt_name(), 'BTCCNY')
     self.assertEqual(instmts[name].get_instmt_code(), 'btccny')
     self.assertEqual(instmts[name].get_order_book_link(),
                      'https://data.btcchina.com/data/orderbook?limit=5&market=btccny')
     self.assertEqual(instmts[name].get_trades_link(),
                      'https://data.btcchina.com/data/historydata?limit=1000&since=<id>&market=btccny')
     m = instmts[name].get_order_book_fields_mapping()
     self.assertEqual(m['date'], 'TIMESTAMP')
     self.assertEqual(m['bids'], 'BIDS')
     self.assertEqual(m['asks'], 'ASKS')
     m = instmts[name].get_trades_fields_mapping()
     self.assertEqual(m['date'], 'TIMESTAMP')
     self.assertEqual(m['type'], 'TRADE_SIDE')
     self.assertEqual(m['tid'], 'TRADE_ID')
     self.assertEqual(m['price'], 'TRADE_PRICE')        
     self.assertEqual(m['amount'], 'TRADE_VOLUME')        
     
     # BTCC-XBTCNY
     name = 'BTCC-XBTCNY-Restful'
     self.assertEqual(instmts[name].get_exchange_name(), 'BTCC')
     self.assertEqual(instmts[name].get_instmt_name(), 'XBTCNY')
     self.assertEqual(instmts[name].get_instmt_code(), 'xbtcny')
     self.assertEqual(instmts[name].get_order_book_link(),
                      'https://pro-data.btcc.com/data/pro/orderbook?limit=5&symbol=xbtcny')
     self.assertEqual(instmts[name].get_trades_link(),
                      'https://pro-data.btcc.com/data/pro/historydata?limit=1000<id>&symbol=xbtcny')
     m = instmts[name].get_order_book_fields_mapping()
     self.assertEqual(m['date'], 'TIMESTAMP')
     self.assertEqual(m['bids'], 'BIDS')
     self.assertEqual(m['asks'], 'ASKS')
     self.assertEqual(m['TIMESTAMP_OFFSET'], 1000)   
     m = instmts[name].get_trades_fields_mapping()
     self.assertEqual(m['Timestamp'], 'TIMESTAMP')
     self.assertEqual(m['Side'], 'TRADE_SIDE')
     self.assertEqual(m['Id'], 'TRADE_ID')
     self.assertEqual(m['Price'], 'TRADE_PRICE')        
     self.assertEqual(m['Quantity'], 'TRADE_VOLUME')