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class TestDecimal256DataType < Test::Unit::TestCase
  def test_type
    data_type = Arrow::Decimal256DataType.new(2, 0)
    assert_equal(Arrow::Type::DECIMAL256, data_type.id)
  end

  def test_name
    data_type = Arrow::Decimal256DataType.new(2, 0)
    assert_equal("decimal256", data_type.name)
  end

  def test_to_s
    data_type = Arrow::Decimal256DataType.new(2, 0)
    assert_equal("decimal256(2, 0)", data_type.to_s)
  end

  def test_precision
    data_type = Arrow::Decimal256DataType.new(8, 2)
    assert_equal(8, data_type.precision)
  end

  def test_scale
    data_type = Arrow::Decimal256DataType.new(8, 2)
    assert_equal(2, data_type.scale)
  end

  def test_decimal_data_type_new
    assert_equal(Arrow::Decimal256DataType.new(39, 1),
                 Arrow::DecimalDataType.new(39, 1))
  end

  def test_invalid_precision
    assert_raise(Arrow::Error::Invalid) do
      Arrow::Decimal256DataType.new(77, 1)
    end
  end
end
