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

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class TestBufferInputStream < Test::Unit::TestCase
  def test_read
    buffer = Arrow::Buffer.new("Hello World")
    buffer_input_stream = Arrow::BufferInputStream.new(buffer)
    read_buffer = buffer_input_stream.read(5)
    assert_equal("Hello", read_buffer.data.to_s)
  end

  def test_advance
    buffer = Arrow::Buffer.new("Hello World")
    buffer_input_stream = Arrow::BufferInputStream.new(buffer)
    buffer_input_stream.advance(6)
    read_buffer = buffer_input_stream.read(5)
    assert_equal("World", read_buffer.data.to_s)
  end

  def test_align
    buffer = Arrow::Buffer.new("Hello World")
    buffer_input_stream = Arrow::BufferInputStream.new(buffer)
    buffer_input_stream.advance(3)
    buffer_input_stream.align(8)
    read_buffer = buffer_input_stream.read(3)
    assert_equal("rld", read_buffer.data.to_s)
  end

  def test_peek
    buffer = Arrow::Buffer.new("Hello World")
    buffer_input_stream = Arrow::BufferInputStream.new(buffer)
    peeked_data = buffer_input_stream.peek(5)
    assert_equal(buffer_input_stream.read(5).data.to_s,
                 peeked_data.to_s)
  end

  def test_gio_input_stream
    # U+3042 HIRAGANA LETTER A
    data = "\u3042"
    convert_encoding = "cp932"
    buffer = Arrow::Buffer.new(data)
    buffer_input_stream = Arrow::BufferInputStream.new(buffer)
    converter = Gio::CharsetConverter.new(convert_encoding, "UTF-8")
    convert_input_stream =
      Gio::ConverterInputStream.new(buffer_input_stream, converter)
    gio_input_stream = Arrow::GIOInputStream.new(convert_input_stream)
    raw_read_data = gio_input_stream.read(10).data.to_s
    assert_equal(data.encode(convert_encoding),
                 raw_read_data.dup.force_encoding(convert_encoding))
  end
end