ruby/red-parquet/test/test-boolean-statistics.rb

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class TestBooleanStatistics < Test::Unit::TestCase
  def setup
    Tempfile.create(["data", ".parquet"]) do |file|
      array = Arrow::BooleanArray.new([nil, false, true])
      table = Arrow::Table.new("boolean" => array)
      Parquet::ArrowFileWriter.open(table.schema, file.path) do |writer|
        chunk_size = 1024
        writer.write_table(table, chunk_size)
        writer.close
      end
      Parquet::ArrowFileReader.open(file.path) do |reader|
        @statistics =
          reader.metadata.get_row_group(0).get_column_chunk(0).statistics
        yield
        @statistics = nil
      end
      GC.start # Ensure freeing @statistics that refers file.path.
    end
  end

  def test_min
    assert_equal(false, @statistics.min)
  end

  def test_max
    assert_equal(true, @statistics.max)
  end
end