Method MakeScanner

cpp/src/arrow/dataset/scanner_test.cc:1977–1988

  }

  std::shared_ptr<Scanner> MakeScanner(::arrow::internal::Executor* io_executor) {
    acero::BackpressureOptions low_backpressure(kResumeIfBelowBytes, kPauseIfAboveBytes);
    io::IOContext io_context(default_memory_pool(), io_executor);
    std::shared_ptr<Dataset> dataset = MakeDataset();
    std::shared_ptr<ScanOptions> options = std::make_shared<ScanOptions>();
    options->io_context = io_context;
    ScannerBuilder builder(std::move(dataset), options);
    ARROW_EXPECT_OK(builder.UseThreads(false));
    ARROW_EXPECT_OK(builder.Backpressure(low_backpressure));
    EXPECT_OK_AND_ASSIGN(auto scanner, builder.Finish());
    return scanner;
  }

  int TotalBatchesRead() {
    int sum = 0;