tustvold commented on code in PR #5646:
URL: https://github.com/apache/arrow-rs/pull/5646#discussion_r1565884800
##########
arrow-json/src/writer.rs:
##########
@@ -2215,4 +2216,86 @@ mod tests {
);
}
}
+
+ #[test]
+ fn test_writer_fixed_size_list() {
+ let size = 3;
+ let field = FieldRef::new(Field::new("item", DataType::Int32, true));
+ let schema = SchemaRef::new(Schema::new(vec![Field::new(
+ "list",
+ DataType::FixedSizeList(field, size),
+ true,
+ )]));
+
+ let values_builder = Int32Builder::new();
+ let mut list_builder = FixedSizeListBuilder::new(values_builder, size);
+ let lists = [
+ Some([Some(1), Some(2), None]),
+ Some([Some(3), None, Some(4)]),
+ Some([None, Some(5), Some(6)]),
+ None,
+ ];
+ for list in lists {
+ match list {
+ Some(l) => {
+ for value in l {
+ match value {
+ Some(v) => list_builder.values().append_value(v),
+ None => list_builder.values().append_null(),
+ }
+ }
+ list_builder.append(true);
+ }
+ None => {
+ for _ in 0..size {
+ list_builder.values().append_null();
+ }
+ list_builder.append(false);
+ }
+ }
+ }
+ let array = Arc::new(list_builder.finish()) as ArrayRef;
+ let batch = RecordBatch::try_new(schema, vec![array]).unwrap();
+
+ //encode and check JSON with explicit nulls:
Review Comment:
:heart:
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