test: add test for kraken balance response parsing

part of #11118

tests/exchange_online/conftest.py

@@ -139,6 +139,23 @@ EXCHANGES = {
         "leverage_tiers_public": False,
         "leverage_in_spot_market": True,
         "trades_lookback_hours": 12,
+        "sample_balances": {
+            "exchange_response": {
+                "result": {
+                    "ADA": {"balance": "0.00000000", "hold_trade": "0.00000000"},
+                    "ADA.F": {"balance": "2.00000000", "hold_trade": "0.00000000"},
+                    "XBT": {"balance": "0.00060000", "hold_trade": "0.00000000"},
+                    "XBT.F": {"balance": "0.00100000", "hold_trade": "0.00000000"},
+                }
+            },
+            "expected": {
+                "ADA": {"free": 0.0, "total": 0.0, "used": 0.0},
+                "ADA.F": {"free": 2.0, "total": 2.0, "used": 0.0},
+                "BTC": {"free": 0.0006, "total": 0.0006, "used": 0.0},
+                # XBT.F should be mapped to BTC.F
+                "XBT.F": {"free": 0.001, "total": 0.001, "used": 0.0},
+            },
+        },
     },
     "kucoin": {
         "pair": "XRP/USDT",

tests/exchange_online/test_ccxt_compat.py

@@ -114,6 +114,19 @@ class TestCCXTExchange:
         else:
             pytest.skip(f"No sample Trades available for exchange {exchange_name}")
 
+    def test_ccxt_balances_parse(self, exchange: EXCHANGE_FIXTURE_TYPE):
+        exch, exchange_name = exchange
+        if balance_response := EXCHANGES[exchange_name].get("sample_balances"):
+            balances = exch._api.parse_balance(balance_response["exchange_response"])
+            expected = balance_response["expected"]
+            for currency, balance in expected.items():
+                assert currency in balances
+                assert isinstance(balance, dict)
+                assert balance == balances[currency]
+            pass
+        else:
+            pytest.skip(f"No sample Balances available for exchange {exchange_name}")
+
     def test_ccxt_fetch_tickers(self, exchange: EXCHANGE_FIXTURE_TYPE):
         exch, exchangename = exchange
         pair = EXCHANGES[exchangename]["pair"]