Added more update_funding_fee tests, set exchange of default conf

freqtrade/exchange/bybit.py

@@ -1,7 +1,8 @@
 """ Bybit exchange subclass """
 import logging
-from typing import Dict, List
+from typing import Dict, List, Tuple
 
+from freqtrade.enums import Collateral, TradingMode
 from freqtrade.exchange import Exchange
 
 
@@ -23,3 +24,9 @@ class Bybit(Exchange):
     }
 
     funding_fee_times: List[int] = [0, 8, 16]  # hours of the day
+
+    _supported_trading_mode_collateral_pairs: List[Tuple[TradingMode, Collateral]] = [
+        # TradingMode.SPOT always supported and not required in this list
+        # (TradingMode.FUTURES, Collateral.CROSS),  # TODO-lev: Uncomment once supported
+        # (TradingMode.FUTURES, Collateral.ISOLATED) # TODO-lev: Uncomment once supported
+    ]