From b26b2993911f2c487f6f355a27c68fa2074d8373 Mon Sep 17 00:00:00 2001
From: "Haoyu (Daniel)" <yanghaoyu97@outlook.com>
Date: Tue, 26 Nov 2024 20:43:44 +0800
Subject: [PATCH] add test for non-numerical warning

---
 tests/core/test_structure.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/core/test_structure.py b/tests/core/test_structure.py
index 67eee7fd04e..c0f618f2baf 100644
--- a/tests/core/test_structure.py
+++ b/tests/core/test_structure.py
@@ -1685,6 +1685,11 @@ def test_merge_sites(self):
         assert len(struct_navs2) == 12
         assert any(math.isclose(site.properties["prop1"], 51.5) for site in struct_navs2)
 
+        # Test non-numerical property warning
+        struct_navs2.insert(0, "Na", coords[0], properties={"prop1": "hi"})
+        with pytest.warns(UserWarning, match="But property is set to None"):
+            struct_navs2.merge_sites(mode="average")
+
         # Test property handling for np.array (selective dynamics)
         poscar_str_0 = """Test POSCAR
 1.0