writer_spec.rb

require 'circuitizer'

describe DotWriter do
  it "writes a board to a file" do
    b = Board.new do
      source 's1', true
      source 's2', true
      and_gate 'AND'
      reading 'OUT'
      trace 's1', 'AND'
      trace 's2', 'AND'
      trace 'AND', 'OUT'
    end
    b.run

    Tempfile.new('testing_circuit.ps') do |file|
      DotWriter.write(b, file.path)
      file.size.should > 0
    end
  end

end


class DotWriter

  def self.write(board, filename)
    g = Graph.new(board)
    IO.popen("dot -Tps -o #{filename}", 'r+') do |dot|
      dot.write(g.to_dot)
    end
  end

end

Tempfile.new('testing_circuit.ps') do |file|
  DotWriter.write(b, file.path)
  file.size.should > 0
end