From 039c88b4ceef9bc2df8b92d29bb4b6a72df34952 Mon Sep 17 00:00:00 2001
From: 69049ed6x <69049ed6x@users.noreply.github.com>
Date: Sat, 7 Mar 2026 18:58:04 +0800
Subject: [PATCH] test: cover empty string factor rule condition

---
 tests/test_factor_rules.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tests/test_factor_rules.py b/tests/test_factor_rules.py
index 0ff7ad88..5be363aa 100644
--- a/tests/test_factor_rules.py
+++ b/tests/test_factor_rules.py
@@ -318,6 +318,15 @@ class FactorRulesPathTests(unittest.TestCase):
 
         self.assertIn("- Conditions: ('threshold', 5)", summary)
 
+    def test_summarize_factor_rules_preserves_empty_string_condition(self):
+        summary = summarize_factor_rules(
+            [{"name": "Carry", "signal": "neutral", "conditions": [""]}],
+            ticker="IEF",
+            trade_date="2026-03-07",
+        )
+
+        self.assertIn("- Conditions: ", summary)
+
 
 if __name__ == "__main__":
     unittest.main()