refactor: reuse market symbol normalization

app/tests/test_market_symbol_normalization.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+import unittest
+
+from backend.bootstrap.config import tushare_code
+from backend.features.market import charts
+
+
+class MarketSymbolNormalizationTests(unittest.TestCase):
+    def test_chart_and_market_services_share_one_suffix_converter(self) -> None:
+        self.assertIs(charts._stock_market_code, tushare_code)
+
+    def test_existing_exchange_mapping_is_preserved(self) -> None:
+        cases = {
+            "000001": "000001.SZ",
+            "600000": "600000.SH",
+            "430047": "430047.BJ",
+            "830799": "830799.BJ",
+        }
+        for code, expected in cases.items():
+            with self.subTest(code=code):
+                self.assertEqual(charts._stock_market_code(code), expected)
+
+
+if __name__ == "__main__":
+    unittest.main()