## lib/iteration.rb

# To not overload namespaces
module Iteration
  # Add 2 to each element and return the new array.
  def add_2(array)
    array.map { |e| e+2 }
  end

  # Delete all smaller than 4 and sort it from lowest to highest
  def del_sort(array)
    array.reject { |e| e<4 }.sort
  end

  # To be able to call the methods via Iteration.method
  module_function :add_2, :del_sort
end


## test/suite/lib/interation.rb

Baretest.suite "Hands-on" do

  suite 'Iteration' do

    setup :input => 1, "first example" do # input, variante 1 (kann irgend ein objekt sein, z.B. auch ein String)
      @input = [*0..10]
    end

    setup :input => 2, "second example" do
      @input = [10, 2, 1, -2, 14, -1, 13, -4, 6, 8, -5, 3, 7, 12, 9, -3, 0, 15, 11, 5, 4]
    end

    suite "#add2" do
      setup :input => 1 do # ergänze :input variante 1
        @result = [*2..12]
      end

      setup :input => 2 do # ergänze :input variante 2
        @result = [12, 4, 3, 0, 16, 1, 15, -2, 8, 10, -3, 5, 9, 14, 11, -1, 2, 17, 13, 7, 6] # mit sort_by { rand } wüsst ich nicht wirklich wie...
      end

      assert ":input" do
        @result == Iteration.add_2(@input)
      end
    end

    suite "#del_sort" do
      setup :input => 1 do # ergänze :input variante 1
        @result = [*4..10]
      end

      setup :input => 2 do # ergänze :input variante 2
        @result = [*4..15]
      end

      assert "del_sort with :input" do
        @result_del_sort == Iteration.del_sort(@input)
      end
    end
  end
end