test: add test for get_dry_run_wallet

Author: xmatthias

tests/util/test_wallet_util.py

@@ -0,0 +1,19 @@
+import pytest
+
+from freqtrade.util import get_dry_run_wallet
+
+
+@pytest.mark.parametrize(
+    "wallet,stake_currency,expected",
+    [
+        (1000, "USDT", 1000),
+        ({"USDT": 1000, "USDC": 500}, "USDT", 1000),
+        ({"USDT": 1000, "USDC": 500}, "USDC", 500),
+        ({"USDT": 1000, "USDC": 500}, "NOCURR", 0.0),
+    ],
+)
+def test_get_dry_run_wallet(default_conf_usdt, wallet, stake_currency, expected):
+    # As int
+    default_conf_usdt["dry_run_wallet"] = wallet
+    default_conf_usdt["stake_currency"] = stake_currency
+    assert get_dry_run_wallet(default_conf_usdt) == expected