test: add failing test for freqtrade#11752

Author: xmatthias

tests/strategy/test_strategy_loading.py

@@ -385,6 +385,17 @@ def test_strategy_max_open_trades_infinity_from_strategy(caplog, default_conf):
     assert strategy.max_open_trades == float("inf")
     assert default_conf["max_open_trades"] == float("inf")
 
+    # test if the default value is set to infinity (V2 doesn't set max_open_trades explicitly)
+    del default_conf["max_open_trades"]
+    default_conf.update(
+        {
+            "strategy": "StrategyTestV2",
+        }
+    )
+    strategy2 = StrategyResolver.load_strategy(default_conf)
+    assert strategy2.max_open_trades == float("inf")
+    assert default_conf["max_open_trades"] == float("inf")
+
 
 def test_strategy_max_open_trades_infinity_from_config(caplog, default_conf, mocker):
     caplog.set_level(logging.INFO)