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#
#   http://www.apache.org/licenses/LICENSE-2.0
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class TestDatasetScanner < Test::Unit::TestCase
  include Helper::Buildable
  include Helper::Writable

  def setup
    omit("Arrow Dataset is required") unless defined?(ArrowDataset)
    Dir.mktmpdir do |tmpdir|
      path = File.join(tmpdir, "table.arrow")
      @table = build_table(visible: [
                             build_boolean_array([true, false, true]),
                             build_boolean_array([false, true, false, true]),
                           ],
                           point: [
                             build_int32_array([1, 2, 3]),
                             build_int32_array([-1, -2, -3, -4]),
                           ])
      @format = ArrowDataset::IPCFileFormat.new
      write_table(@table, path)
      factory = ArrowDataset::FileSystemDatasetFactory.new(@format)
      factory.file_system_uri = build_file_uri(path)
      @dataset = factory.finish
      builder = @dataset.begin_scan
      @scanner = builder.finish
      yield
    end
  end

  def test_to_table
    assert_equal(@table, @scanner.to_table)
  end

  def test_to_record_batch_reader
    reader = @scanner.to_record_batch_reader
    begin
      assert_equal(@table, reader.read_all)
    ensure
      # Unref to ensure the reader closes files and we can delete the temp directory
      reader.unref
    end
  end
end
