feat期权标的白名单：可固定只显示 ETH 或 BTC。

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

tests/test_options_underly_lib.py

@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+import os
+import unittest
+
+from lib.options.options_underly_lib import (
+    inst_underly_not_allowed_msg,
+    parse_options_underlyings,
+    resolve_default_underly,
+    underly_not_allowed_msg,
+)
+
+
+class OptionsUnderlyLibTests(unittest.TestCase):
+    def setUp(self):
+        self._old_u = os.environ.get("OKX_OPTIONS_UNDERLYINGS")
+        self._old_d = os.environ.get("OKX_OPTIONS_DEFAULT_UNDERLY")
+
+    def tearDown(self):
+        self._restore("OKX_OPTIONS_UNDERLYINGS", self._old_u)
+        self._restore("OKX_OPTIONS_DEFAULT_UNDERLY", self._old_d)
+
+    @staticmethod
+    def _restore(key: str, val: str | None) -> None:
+        if val is None:
+            os.environ.pop(key, None)
+        else:
+            os.environ[key] = val
+
+    def test_default_both(self):
+        os.environ.pop("OKX_OPTIONS_UNDERLYINGS", None)
+        self.assertEqual(parse_options_underlyings(), ["ETH", "BTC"])
+
+    def test_eth_only(self):
+        os.environ["OKX_OPTIONS_UNDERLYINGS"] = "ETH"
+        self.assertEqual(parse_options_underlyings(), ["ETH"])
+        self.assertIsNone(underly_not_allowed_msg("ETH"))
+        self.assertIsNotNone(underly_not_allowed_msg("BTC"))
+        self.assertIsNotNone(inst_underly_not_allowed_msg("BTC-USD-260328-100000-C"))
+
+    def test_default_clamped_to_whitelist(self):
+        os.environ["OKX_OPTIONS_UNDERLYINGS"] = "BTC"
+        os.environ["OKX_OPTIONS_DEFAULT_UNDERLY"] = "ETH"
+        self.assertEqual(resolve_default_underly(), "BTC")
+
+    def test_ignores_junk(self):
+        os.environ["OKX_OPTIONS_UNDERLYINGS"] = "ETH, DOGE ,btc"
+        self.assertEqual(parse_options_underlyings(), ["ETH", "BTC"])
+
+
+if __name__ == "__main__":
+    unittest.main()