Method SingleBatch

cpp/src/arrow/dataset/file_parquet_test.cc:168–172

  }

  std::shared_ptr<RecordBatch> SingleBatch(Fragment* fragment) {
    auto batches = IteratorToVector(Batches(fragment));
    EXPECT_EQ(batches.size(), 1);
    return batches.front();
  }

  void CountRowsAndBatchesInScan(Fragment* fragment, int64_t expected_rows,
                                 int64_t expected_batches) {