c_glib/test/test-buffer-output-stream.rb

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#
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class TestBufferOutputStream < Test::Unit::TestCase
  include Helper::Buildable

  def test_new
    buffer = Arrow::ResizableBuffer.new(0)
    output_stream = Arrow::BufferOutputStream.new(buffer)
    output_stream.write("Hello")
    output_stream.close
    assert_equal("Hello", buffer.data.to_s)
  end

  def test_align
    buffer = Arrow::ResizableBuffer.new(0)
    output_stream = Arrow::BufferOutputStream.new(buffer)
    output_stream.write("Hello")
    output_stream.align(8)
    output_stream.close
    assert_equal("Hello\x00\x00\x00", buffer.data.to_s)
  end

  def test_write_record_batch
    fields = [
      Arrow::Field.new("visible", Arrow::BooleanDataType.new),
      Arrow::Field.new("valid", Arrow::BooleanDataType.new),
    ]
    schema = Arrow::Schema.new(fields)
    columns = [
      build_boolean_array([true]),
      build_boolean_array([false]),
    ]
    record_batch = Arrow::RecordBatch.new(schema, 1, columns)

    buffer = Arrow::ResizableBuffer.new(0)
    options = Arrow::WriteOptions.new
    output_stream = Arrow::BufferOutputStream.new(buffer)
    output_stream.write_record_batch(record_batch, options)
    output_stream.close

    input_stream = Arrow::BufferInputStream.new(buffer)
    assert_equal(record_batch,
                 input_stream.read_record_batch(schema))
  end
end