fix: show header realtime PnL from exchange positions and order metrics

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_instance_live_pnl_lib.py

@@ -0,0 +1,58 @@
+"""instance_live_pnl_lib 单元测试。"""
+from __future__ import annotations
+
+import unittest
+
+from lib.instance.instance_live_pnl_lib import (
+    position_row_contracts,
+    resolve_instance_unrealized_pnl,
+    sum_unrealized_pnl_from_metrics,
+    sum_unrealized_pnl_from_positions,
+)
+
+
+class TestInstanceLivePnlLib(unittest.TestCase):
+    def test_position_row_contracts_from_info(self):
+        pos = {"contracts": 0, "info": {"positionAmt": "12.5"}}
+        self.assertAlmostEqual(position_row_contracts(pos), 12.5)
+
+    def test_sum_from_positions_binance_style(self):
+        positions = [
+            {"unrealizedPnl": -0.14, "info": {"positionAmt": "100"}},
+        ]
+        self.assertEqual(sum_unrealized_pnl_from_positions(positions), -0.14)
+
+    def test_sum_from_metrics_fallback(self):
+        rows = [{"exchange_symbol": "DOGE/USDT:USDT", "symbol": "DOGE/USDT", "direction": "long"}]
+
+        def _metrics(ex_sym, direction):
+            self.assertEqual(direction, "long")
+            return {"unrealized_pnl": -0.14}
+
+        self.assertEqual(sum_unrealized_pnl_from_metrics(rows, _metrics), -0.14)
+
+    def test_resolve_prefers_bulk_positions(self):
+        def _fetch():
+            return [{"unrealizedPnl": 1.2, "contracts": 1}]
+
+        def _metrics(_ex, _d):
+            raise AssertionError("should not call metrics when bulk works")
+
+        total = resolve_instance_unrealized_pnl(_fetch, [], _metrics)
+        self.assertEqual(total, 1.2)
+
+    def test_resolve_falls_back_to_metrics(self):
+        def _fetch():
+            raise RuntimeError("api down")
+
+        rows = [{"exchange_symbol": "BTC/USDT:USDT", "symbol": "BTC/USDT", "direction": "short"}]
+
+        def _metrics(_ex, direction):
+            return {"unrealized_pnl": -2.5} if direction == "short" else None
+
+        total = resolve_instance_unrealized_pnl(_fetch, rows, _metrics)
+        self.assertEqual(total, -2.5)
+
+
+if __name__ == "__main__":
+    unittest.main()