ruby/red-arrow/test/test-rolling-window.rb

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#
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class RollingWindowTest < Test::Unit::TestCase
  include Helper::Fixture

  def setup
    raw_table = {
      :number => Arrow::Int32Array.new([1, -2, nil, 4, 6, 3]),
    }
    @table = Arrow::Table.new(raw_table)
  end

  test("#lag") do
    assert_equal(<<-ARRAY.chomp, @table.window.lag(:number).to_s)
[
  null,
  -3,
  null,
  null,
  2,
  -3
]
    ARRAY
  end
end