Method MakeBatchesAndReader

cpp/src/arrow/record_batch_test.cc:717–745

 protected:
  void MakeBatchesAndReader(int length) {
    auto field1 = field("f1", int32());
    auto field2 = field("f2", uint8());
    auto field3 = field("f3", int16());

    auto schema = ::arrow::schema({field1, field2, field3});

    random::RandomArrayGenerator gen(42);

    auto array1_1 = gen.ArrayOf(int32(), length);
    auto array1_2 = gen.ArrayOf(int32(), length);
    auto array1_3 = gen.ArrayOf(int32(), length);

    auto array2_1 = gen.ArrayOf(uint8(), length);
    auto array2_2 = gen.ArrayOf(uint8(), length);
    auto array2_3 = gen.ArrayOf(uint8(), length);

    auto array3_1 = gen.ArrayOf(int16(), length);
    auto array3_2 = gen.ArrayOf(int16(), length);
    auto array3_3 = gen.ArrayOf(int16(), length);

    auto batch1 = RecordBatch::Make(schema, length, {array1_1, array2_1, array3_1});
    auto batch2 = RecordBatch::Make(schema, length, {array1_2, array2_2, array3_2});
    auto batch3 = RecordBatch::Make(schema, length, {array1_3, array2_3, array3_3});

    batches_ = {batch1, batch2, batch3};

    ASSERT_OK_AND_ASSIGN(reader_, RecordBatchReader::Make(batches_));
  }
  std::vector<std::shared_ptr<RecordBatch>> batches_;
  std::shared_ptr<RecordBatchReader> reader_;
};