Fix open trades checks

core/tests/trading/test_active_management.py

@@ -393,8 +393,23 @@ class ActiveManagementTestCase(StrategyMixin, SymbolPriceMock, TestCase):
             self.trades[10:],  # Only close newer trades
         )
 
-    def test_max_open_trades_per_symbol_violated(self):
-        pass
+    @patch("core.trading.active_management.ActiveManagement.handle_violation")
+    def test_max_open_trades_per_symbol_violated(self, handle_violation):
+        for x in range(2):
+            self.add_trade(
+                str(x),
+                "EUR_USD",
+                "long",
+                f"2023-02-13T12:39:1{x}.302917985Z",
+            )
+
+        self.ams.run_checks()
+        self.check_violation(
+            "max_open_trades_per_symbol",
+            handle_violation.call_args_list,
+            "close",
+            self.trades[2:],  # Only close newer trades
+        )
 
     def test_max_loss_violated(self):
         pass