chore: add tests for out of bounds for NullArray (#16802)

* chore: add tests for out of bounds for NullArray

* chore: add tests for out of bounds for NullArray

Author: comphead

datafusion/sqllogictest/test_files/array.slt

@@ -8065,6 +8065,13 @@ FixedSizeList(Field { name: "item", data_type: Int32, nullable: true, dict_id: 0
 statement error
 create table varying_fixed_size_col_table (a int[3]) as values ([1,2,3]), ([4,5]);
 
+# https://github.com/apache/datafusion/issues/16187
+# should be NULL in case of out of bounds for Null Type
+query ?
+select [named_struct('a', 1, 'b', null)][-2];
+----
+NULL
+
 ### Delete tables
 
 statement ok

datafusion/sqllogictest/test_files/map.slt

@@ -833,5 +833,12 @@ select column3[true] from tt;
 ----
 3
 
+# https://github.com/apache/datafusion/issues/16187
+# should be NULL in case of out of bounds for Null Type
+query ?
+select map_values(map([named_struct('a', 1, 'b', null)], [named_struct('a', 1, 'b', null)]))[0] as a;
+----
+NULL
+
 statement ok
 drop table tt;