fixed failing tests in tests/commands/test_commands.py by adding NONE='' option to MarginMode

freqtrade/constants.py

@@ -46,7 +46,7 @@ DEFAULT_DATAFRAME_COLUMNS = ['date', 'open', 'high', 'low', 'close', 'volume']
 # it has wide consequences for stored trades files
 DEFAULT_TRADES_COLUMNS = ['timestamp', 'id', 'type', 'side', 'price', 'amount', 'cost']
 TRADING_MODES = ['spot', 'margin', 'futures']
-MARGIN_MODES = ['cross', 'isolated']
+MARGIN_MODES = ['cross', 'isolated', '']
 
 LAST_BT_RESULT_FN = '.last_result.json'
 FTHYPT_FILEVERSION = 'fthypt_fileversion'

freqtrade/enums/marginmode.py

@@ -9,3 +9,4 @@ class MarginMode(Enum):
     """
     CROSS = "cross"
     ISOLATED = "isolated"
+    NONE = ''