add test for same type

GlareDB · Mar 5, 2024 · 56cc58c · 56cc58c
1 parent 454ed42
commit 56cc58c
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/datafusion/expr/src/type_coercion/functions.rs b/datafusion/expr/src/type_coercion/functions.rs
@@ -542,6 +542,14 @@ mod tests {
         let coerced_data_types = data_types(&current_types, &signature);
         assert!(coerced_data_types.is_err());
 
+        // make sure it works with the same type.
+        let signature = Signature::exact(
+            vec![DataType::FixedSizeList(inner.clone(), 2)],
+            Volatility::Stable,
+        );
+        let coerced_data_types = data_types(&current_types, &signature).unwrap();
+        assert_eq!(coerced_data_types, current_types);
+
         Ok(())
     }