day14_spec.rb

require './day14.rb'
require 'rspec'

# RSpec.configure do |c|
#   c.filter_run_including :focus => true
# end

describe NanoFactory do
  context 'example 1' do
    let(:reactions) do
      <<~REACTIONS
        10 ORE => 10 A
        1 ORE => 1 B
        7 A, 1 B => 1 C
        7 A, 1 C => 1 D
        7 A, 1 D => 1 E
        7 A, 1 E => 1 FUEL
      REACTIONS
    end
    subject { NanoFactory.new(reactions) }
    it 'should require 31 ORE for 1 FUEL' do
      expect(subject.ore_required).to eq 31
    end
  end

  context 'example 2' do
    let(:reactions) do
      <<~REACTIONS
        9 ORE => 2 A
        8 ORE => 3 B
        7 ORE => 5 C
        3 A, 4 B => 1 AB
        5 B, 7 C => 1 BC
        4 C, 1 A => 1 CA
        2 AB, 3 BC, 4 CA => 1 FUEL
      REACTIONS
    end
    subject { NanoFactory.new(reactions) }
    it 'should require 165 ORE for 1 FUEL' do
      expect(subject.ore_required).to eq 165
    end
  end

  context 'example 3' do
    let(:reactions) do
      <<~REACTIONS
        157 ORE => 5 NZVS
        165 ORE => 6 DCFZ
        44 XJWVT, 5 KHKGT, 1 QDVJ, 29 NZVS, 9 GPVTF, 48 HKGWZ => 1 FUEL
        12 HKGWZ, 1 GPVTF, 8 PSHF => 9 QDVJ
        179 ORE => 7 PSHF
        177 ORE => 5 HKGWZ
        7 DCFZ, 7 PSHF => 2 XJWVT
        165 ORE => 2 GPVTF
        3 DCFZ, 7 NZVS, 5 HKGWZ, 10 PSHF => 8 KHKGT
      REACTIONS
    end
    subject { NanoFactory.new(reactions) }
    it 'should require 13312 ORE for 1 FUEL' do
      expect(subject.ore_required).to eq 13312
    end
  end

  context 'example 4' do
    let(:reactions) do
      <<~REACTIONS
        2 VPVL, 7 FWMGM, 2 CXFTF, 11 MNCFX => 1 STKFG
        17 NVRVD, 3 JNWZP => 8 VPVL
        53 STKFG, 6 MNCFX, 46 VJHF, 81 HVMC, 68 CXFTF, 25 GNMV => 1 FUEL
        22 VJHF, 37 MNCFX => 5 FWMGM
        139 ORE => 4 NVRVD
        144 ORE => 7 JNWZP
        5 MNCFX, 7 RFSQX, 2 FWMGM, 2 VPVL, 19 CXFTF => 3 HVMC
        5 VJHF, 7 MNCFX, 9 VPVL, 37 CXFTF => 6 GNMV
        145 ORE => 6 MNCFX
        1 NVRVD => 8 CXFTF
        1 VJHF, 6 MNCFX => 4 RFSQX
        176 ORE => 6 VJHF
      REACTIONS
    end
    subject { NanoFactory.new(reactions) }
    it 'should require 180697 ORE for 1 FUEL' do
      expect(subject.ore_required).to eq 180697
    end
  end

  context 'example 5' do
    let(:reactions) do
      <<~REACTIONS
        171 ORE => 8 CNZTR
        7 ZLQW, 3 BMBT, 9 XCVML, 26 XMNCP, 1 WPTQ, 2 MZWV, 1 RJRHP => 4 PLWSL
        114 ORE => 4 BHXH
        14 VRPVC => 6 BMBT
        6 BHXH, 18 KTJDG, 12 WPTQ, 7 PLWSL, 31 FHTLT, 37 ZDVW => 1 FUEL
        6 WPTQ, 2 BMBT, 8 ZLQW, 18 KTJDG, 1 XMNCP, 6 MZWV, 1 RJRHP => 6 FHTLT
        15 XDBXC, 2 LTCX, 1 VRPVC => 6 ZLQW
        13 WPTQ, 10 LTCX, 3 RJRHP, 14 XMNCP, 2 MZWV, 1 ZLQW => 1 ZDVW
        5 BMBT => 4 WPTQ
        189 ORE => 9 KTJDG
        1 MZWV, 17 XDBXC, 3 XCVML => 2 XMNCP
        12 VRPVC, 27 CNZTR => 2 XDBXC
        15 KTJDG, 12 BHXH => 5 XCVML
        3 BHXH, 2 VRPVC => 7 MZWV
        121 ORE => 7 VRPVC
        7 XCVML => 6 RJRHP
        5 BHXH, 4 VRPVC => 5 LTCX
      REACTIONS
    end
    subject { NanoFactory.new(reactions) }
    it 'should require 2210736 ORE for 1 FUEL' do
      expect(subject.ore_required).to eq 2210736
    end
  end

end