minecraft crafting data modeling exercise part 2

recipe.rb

require "matrix"
require "forwardable"

class RecipeMatrix
  extend Forwardable
  def_delegators :@matrix, :to_a

  def initialize(recipe)
    @matrix = Matrix[*recipe]
  end

  def first_col_empty?
    @matrix.column_vectors.first.all?{|c| c == :empty}
  end

  def first_row_empty?
    @matrix.row_vectors.first.all?{|c| c == :empty}
  end

  def col_rotate!
    @matrix = Matrix.columns(
      @matrix
        .column_vectors
        .to_a
        .rotate
    )
  end

  def row_rotate!
    @matrix = Matrix.rows(
      @matrix
        .row_vectors
        .to_a
        .rotate
    )
  end
end

class Recipe
  attr_reader :recipe

  def initialize(recipe)
    @recipe = RecipeMatrix.new(recipe)
    @recipe.col_rotate! while @recipe.first_col_empty?
    @recipe.row_rotate! while @recipe.first_row_empty?
  end
end

standardized_input = [
  [:coal,  :empty, :empty, ],
  [:stick, :empty, :empty, ],
  [:empty, :empty, :empty, ],
]

inputs = [
  [
    [:coal,  :empty, :empty, ],
    [:stick, :empty, :empty, ],
    [:empty, :empty, :empty, ],
  ],
  [
    [:empty, :empty, :empty, ],
    [:coal,  :empty, :empty, ],
    [:stick, :empty, :empty, ],
  ],
  [
    [:empty, :coal,  :empty, ],
    [:empty, :stick, :empty, ],
    [:empty, :empty, :empty, ],
  ],
  [
    [:empty, :empty, :empty, ],
    [:empty, :coal,  :empty, ],
    [:empty, :stick, :empty, ],
  ],
  [
    [:empty, :empty, :coal,  ],
    [:empty, :empty, :stick, ],
    [:empty, :empty, :empty, ],
  ],
  [
    [:empty, :empty, :empty, ],
    [:empty, :empty, :coal,  ],
    [:empty, :empty, :stick, ],
  ],
]

inputs.each do |input|
  recipe = Recipe.new(input)
  puts recipe.recipe.to_a == standardized_input
end