fix testing issue for index normalization

Author: katosh

README.md

@@ -79,6 +79,7 @@ Release Notes
  * address pygam incompatibility with newer scipy versions
  * address fcsparser incompatibility with Numpy 2.0
  * use different joblib backend in bugy version
+ * more convinient cell-name handling for intergers (e.g., in spatial data)
 
 
  ### Version 1.4.1

tests/test_presults_cluster_gene_trends.py

@@ -145,7 +145,8 @@ def test_cluster_gene_trends_parameters():
     clusters2 = cluster_gene_trends(trends, "branch1", n_neighbors=20)
 
     # The clusters should be different with different parameters
-    assert (clusters1 != clusters2).any()
+    # Convert to string to avoid categorical comparison issues with different categories
+    assert (clusters1.astype(str) != clusters2.astype(str)).any()
 
 
 def test_cluster_gene_trends_error_handling():