wjones127 commented on a change in pull request #11855:
URL: https://github.com/apache/arrow/pull/11855#discussion_r777643434
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File path: cpp/src/arrow/array/array_list_test.cc
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@@ -717,6 +717,29 @@ TEST_F(TestMapArray, BuildingStringToInt) {
ASSERT_ARRAYS_EQUAL(*actual, expected);
}
+TEST_F(TestMapArray, BuildingWithFieldNames) {
+ // Builder should preserve field names in output Array
+ ASSERT_OK_AND_ASSIGN(auto map_type,
+ MapType::Make(field("some_entries",
+ struct_({field("some_key", int16(),
false),
+ field("some_value",
int16())}),
+ false)));
+
+ auto key_builder = std::make_shared<Int16Builder>();
+ auto item_builder = std::make_shared<Int16Builder>();
+ MapBuilder map_builder(default_memory_pool(), key_builder, item_builder,
map_type);
+
+ std::shared_ptr<Array> actual;
+ ASSERT_OK(map_builder.Append());
+ ASSERT_OK(key_builder->AppendValues({0, 1, 2, 3, 4, 5}));
+ ASSERT_OK(item_builder->AppendValues({1, 1, 2, 3, 5, 8}));
+ ASSERT_OK(map_builder.AppendNull());
+ ASSERT_OK(map_builder.Finish(&actual));
Review comment:
Added a simple test.
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