mine_solver_spec.rb

require 'rspec'
require_relative 'mine_solver'

describe MineSolver do
  describe '#safe' do
    it do
      board = '
    1????
    1????
    111??
      1??
1211  1??
???21 1??
????211??
?????????
?????????'
      expected = [
        [0, 5],
        [1, 6],
        [1, 7],
        [2, 7],
        [3, 7],
        [5, 1],
        [5, 7],
        [6, 2],
        [6, 7]
      ]
      expect(subject.safe(board)).to match_array(expected)
    end

    it do
      board = '
1? 
1??
111'
      expected = [[0, 1], [1, 2]]
      expect(subject.safe(board)).to match_array(expected)
    end

    it do
      board = '
1211  
???21 
????21
??????'
      expected = [[1, 1], [2, 2]]
      expect(subject.safe(board)).to match_array(expected)
    end

    it do
      board = '
1211
???1'
      expected = [[1, 1]]
      expect(subject.safe(board)).to match_array(expected)
    end

    it do
      board = '
1?
1?
1?'
      expected = [[0, 1], [2, 1]]
      expect(subject.safe(board)).to match_array(expected)
    end

    it do
      board = '
111
??1
 ??'
      expected = [[1, 0], [2, 1], [2, 2]]
      expect(subject.safe(board)).to match_array(expected)
    end

    it do
      board = '
1 1
1??
1??
1? 
?  '
      expected = [[1, 2], [2, 1], [3, 1]]
      expect(subject.safe(board)).to match_array(expected)
    end

    it do
      board = '
1   
??2 
  ? 
  ?1'
      expected = [[1, 0], [3, 2]]
      expect(subject.safe(board)).to match_array(expected)
    end

    it do
      board = '
1?
 ?
2?'
      expected = [[0, 1]]
      expect(subject.safe(board)).to match_array(expected)
    end
  end
end