kou commented on code in PR #46031:
URL: https://github.com/apache/arrow/pull/46031#discussion_r2055488982
##########
cpp/src/arrow/record_batch_test.cc:
##########
@@ -1423,35 +1452,132 @@ TEST_F(TestRecordBatch,
MakeStatisticsArrayMaxApproximate) {
AssertArraysEqual(*expected_statistics_array, *statistics_array, true);
}
-TEST_F(TestRecordBatch, MakeStatisticsArrayString) {
- auto schema =
- ::arrow::schema({field("no-statistics", boolean()), field("string",
utf8())});
- auto no_statistics_array = ArrayFromJSON(boolean(), "[true, false, true]");
- auto string_array_data = ArrayFromJSON(utf8(), "[\"a\", null,
\"c\"]")->data()->Copy();
- string_array_data->statistics = std::make_shared<ArrayStatistics>();
- string_array_data->statistics->is_max_exact = true;
- string_array_data->statistics->max = "c";
- auto string_array = MakeArray(std::move(string_array_data));
- auto batch = RecordBatch::Make(schema, string_array->length(),
- {no_statistics_array, string_array});
+template <typename DataType>
+class TestRecordBatchMakeStatisticsArrayStringBase {
+ public:
+ std::shared_ptr<::arrow::DataType> type(int32_t byte_width = 1) {
+ if constexpr (std::is_same_v<DataType, FixedSizeBinaryType>) {
+ return fixed_size_binary(byte_width);
+ } else {
+ return TypeTraits<DataType>::type_singleton();
+ }
+ }
+ std::shared_ptr<Array> GenerateString(
+ const std::shared_ptr<::arrow::DataType>& data_type) {
+ if (data_type->id() == Type::FIXED_SIZE_BINARY) {
+ auto byte_width = data_type->byte_width();
+ auto a = std::string(byte_width, 'a');
+ auto b = std::string(byte_width, 'b');
+ auto c = std::string(byte_width, 'c');
+ std::stringstream ss;
+ ss << R"([")" << a << R"(",")" << b << R"(",")" << c << R"("])";
+ return ArrayFromJSON(data_type, ss.str());
+ }
+ return ArrayFromJSON(data_type, R"(["a","b","c"])");
+ }
Review Comment:
How about defining them as functions in anonymous namespace instead of
defining this template class and using it as parent class of
`TestRecordBatchMakeStatisticsArrayEachStringType` and
`TestRecordBatchMakeStatisticsArrayStringBase`?
I think that it simplifies these tests.
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