c_glib/test/test-record-batch-builder.rb

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

  def setup
    @fields = [
      Arrow::Field.new("visible", Arrow::BooleanDataType.new),
      Arrow::Field.new("point", Arrow::Int32DataType.new),
    ]
    @schema = Arrow::Schema.new(@fields)
    @builder = Arrow::RecordBatchBuilder.new(@schema)
  end

  def test_initial_capacity
    @builder.initial_capacity = 128
    assert_equal(128, @builder.initial_capacity)
  end

  def test_schema
    assert_equal(@schema, @builder.schema)
  end

  def test_n_fields
    assert_equal(@fields.size, @builder.n_fields)
  end

  sub_test_case("#get_field") do
    def test_valid
      assert_equal(Arrow::BooleanArrayBuilder,
                   @builder.get_field(0).class)
    end

    def test_negative
      assert_equal(Arrow::Int32ArrayBuilder,
                   @builder.get_field(-1).class)
    end

    def test_too_negative
      assert_nil(@builder.get_field(-@fields.size - 1))
    end

    def test_too_large
      assert_nil(@builder.get_field(@fields.size))
    end
  end

  def test_flush
    arrays = {
      "visible" => build_boolean_array([true, false, true]),
      "point"   => build_int32_array([1, -1, 0]),
    }
    arrays.each_with_index do |(_, array), i|
      @builder.get_field(i).append_values(array.values, [])
    end
    assert_equal(build_record_batch(arrays),
                 @builder.flush)

    arrays = {
      "visible" => build_boolean_array([false, true]),
      "point"   => build_int32_array([10, -10]),
    }
    arrays.each_with_index do |(_, array), i|
      @builder.get_field(i).append_values(array.values, [])
    end
    assert_equal(build_record_batch(arrays),
                 @builder.flush)
  end
end