Guardfile code for running the exercise related tests in Exercism's Ruby Track

Guardfile

guard :minitest, test_folders: '.' do
  watch(%r{^(.*/)?([^/]+)\.rb$})  do |match_data|

    test_file = if match_data[2].include? "test"
                  match_data[2].split('_').first
                else
                  match_data[2]
                end

    "./#{test_file}_test.rb"
  end
end