c_glib/test/parquet/test-arrow-file-writer.rb

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class TestParquetArrowFileWriter < Test::Unit::TestCase
  include Helper::Buildable

  def setup
    omit("Parquet is required") unless defined?(::Parquet)
    @file = Tempfile.open(["data", ".parquet"])
  end

  def test_write
    enabled_values = [true, nil, false, true]
    table = build_table("enabled" => build_boolean_array(enabled_values))
    chunk_size = 2

    writer = Parquet::ArrowFileWriter.new(table.schema, @file.path)
    writer.write_table(table, chunk_size)
    writer.close

    reader = Parquet::ArrowFileReader.new(@file.path)
    reader.use_threads = true
    assert_equal([
                   enabled_values.length / chunk_size,
                   true,
                 ],
                 [
                   reader.n_row_groups,
                   table.equal_metadata(reader.read_table, false),
                 ])
  end
end