liamzwbao commented on code in PR #8233:
URL: https://github.com/apache/arrow-rs/pull/8233#discussion_r2308739717


##########
parquet-variant-compute/src/cast_to_variant.rs:
##########
@@ -2392,4 +2413,64 @@ mod tests {
             }
         }
     }
+
+    fn run_test(values: ArrayRef, expected: Vec<Option<Variant>>) {
+        run_test_with_options(values, expected, true);
+    }
+
+    fn run_test_non_strict(values: ArrayRef, expected: Vec<Option<Variant>>) {
+        run_test_with_options(values, expected, false);
+    }
+
+    #[test]
+    fn test_cast_to_variant_non_strict_mode_date64() {
+        let date64_values = Date64Array::from(vec![Some(i64::MAX), Some(0), 
Some(i64::MIN)]);
+
+        let values = Arc::new(date64_values);
+        run_test_non_strict(
+            values,
+            vec![
+                None,
+                Some(Variant::Date(Date64Type::to_naive_date_opt(0).unwrap())),
+                None,
+            ],
+        );
+    }
+
+    #[test]
+    fn test_cast_to_variant_non_strict_mode_time32() {
+        let time32_array = Time32SecondArray::from(vec![Some(90000), 
Some(3600), Some(-1)]);
+
+        let values = Arc::new(time32_array);
+        run_test_non_strict(
+            values,
+            vec![
+                None,
+                Some(Variant::Time(
+                    NaiveTime::from_num_seconds_from_midnight_opt(3600, 
0).unwrap(),
+                )),
+                None,
+            ],
+        );
+    }
+
+    #[test]
+    fn test_cast_to_variant_non_strict_mode_timestamp() {
+        let ts_array = TimestampSecondArray::from(vec![Some(i64::MAX), 
Some(0), Some(1609459200)])
+            .with_timezone_opt(None::<&str>);
+
+        let values = Arc::new(ts_array);
+        run_test_non_strict(
+            values,
+            vec![
+                None, // Invalid timestamp becomes null

Review Comment:
   Just realized that for overflow value, we may need to convert it to 
`Variant::Null` instead of `None` like what we did for Decimal, see [this 
comment](https://github.com/apache/arrow-rs/issues/8059#issuecomment-3167642459)
 for context. However, I don't think it should be in this PR, we could discuss 
and make them consistent later. 
   
   cc @alamb 



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