ruby/red-arrow-format/test/test-sparse-bitmap-builder.rb

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class TestSparseBitmapBuilder < Test::Unit::TestCase
  def setup
    @builder = ArrowFormat::SparseBitmapBuilder.new
  end

  def test_empty
    buffer = [0b00000001].pack("C") + "\x00" * 63
    assert_equal(IO::Buffer.for(buffer),
                 @builder.finish(1))
  end

  def test_unset_0bit
    @builder.unset(0)
    buffer = [0b11111110].pack("C") + "\x00" * 63
    assert_equal(IO::Buffer.for(buffer),
                 @builder.finish(8))
  end

  def test_unset_multiple_bytes
    @builder.unset(15)
    @builder.unset(31)
    buffer =  [0b11111111].pack("C")
    buffer += [0b01111111].pack("C")
    buffer += [0b11111111].pack("C")
    buffer += [0b01111111].pack("C")
    buffer += [0b11111111].pack("C")
    buffer += "\x00" * 59
    assert_equal(IO::Buffer.for(buffer),
                 @builder.finish(40))
  end

  def test_unset_duplicated
    @builder.unset(15)
    @builder.unset(15)
    buffer =  [0b11111111].pack("C")
    buffer += [0b01111111].pack("C")
    buffer += "\x00" * 62
    assert_equal(IO::Buffer.for(buffer),
                 @builder.finish(16))
  end
end