Fix opportunity ignore_dust handling

tests/test_opportunity_service.py

@@ -100,6 +100,39 @@ class FakeSpotClient:
         return rows
 
 
+class DustOverlapSpotClient(FakeSpotClient):
+    def account_info(self):
+        return {"balances": [{"asset": "XRP", "free": "5", "locked": "0"}]}
+
+    def ticker_price(self, symbols=None):
+        mapping = {"XRPUSDT": {"symbol": "XRPUSDT", "price": "1.5"}}
+        return [mapping[symbol] for symbol in symbols]
+
+    def ticker_stats(self, symbols=None, *, window="1d"):
+        rows = {
+            "XRPUSDT": {
+                "symbol": "XRPUSDT",
+                "lastPrice": "1.5",
+                "priceChangePercent": "10",
+                "quoteVolume": "5000000",
+                "highPrice": "1.52",
+                "lowPrice": "1.2",
+            }
+        }
+        if not symbols:
+            return list(rows.values())
+        return [rows[symbol] for symbol in symbols]
+
+    def exchange_info(self):
+        return {"symbols": [{"symbol": "XRPUSDT", "status": "TRADING"}]}
+
+    def klines(self, symbol, interval, limit):
+        rows = []
+        for index, close in enumerate([1.0, 1.1, 1.2, 1.3, 1.4, 1.45, 1.5][-limit:]):
+            rows.append([index, close * 0.98, close * 1.01, close * 0.97, close, 100 + index * 10, index + 1, close * 100])
+        return rows
+
+
 class OpportunityServiceTestCase(unittest.TestCase):
     def setUp(self):
         self.config = {
@@ -149,6 +182,31 @@ class OpportunityServiceTestCase(unittest.TestCase):
         self.assertEqual([item["symbol"] for item in payload["recommendations"]], ["SOLUSDT", "BTCUSDT"])
         self.assertEqual([item["action"] for item in payload["recommendations"]], ["enter", "enter"])
 
+    def test_scan_respects_ignore_dust_for_overlap_penalty(self):
+        client = DustOverlapSpotClient()
+        base_config = self.config | {
+            "opportunity": self.config["opportunity"] | {
+                "top_n": 1,
+                "ignore_dust": True,
+                "overlap_penalty": 2.0,
+            }
+        }
+        with patch.object(opportunity_service, "audit_event", return_value=None):
+            ignored = opportunity_service.scan_opportunities(base_config, spot_client=client, symbols=["XRPUSDT"])
+            included = opportunity_service.scan_opportunities(
+                base_config | {"opportunity": base_config["opportunity"] | {"ignore_dust": False}},
+                spot_client=client,
+                symbols=["XRPUSDT"],
+            )
+        ignored_rec = ignored["recommendations"][0]
+        included_rec = included["recommendations"][0]
+
+        self.assertEqual(ignored_rec["action"], "enter")
+        self.assertEqual(ignored_rec["metrics"]["position_weight"], 0.0)
+        self.assertEqual(included_rec["action"], "skip")
+        self.assertEqual(included_rec["metrics"]["position_weight"], 1.0)
+        self.assertLess(included_rec["score"], ignored_rec["score"])
+
     def test_signal_score_handles_empty_klines(self):
         score, metrics = signal_service.score_market_signal([], [], {"price_change_pct": 1.0}, {})
         self.assertEqual(score, 0.0)