alekst

class AnagramTest < MiniTest::Unit::TestCase

  class Anagram
    def initialize(word)
      @word = word
      # If you create the array here, then the results will be
      # collected over multiple calls to `match`. Not sure if that is
      # intended or not, so I'll assume it's ok to change.
    end

alekst

class DNATest < MiniTest::Unit::TestCase

  # You don't have to put your classes inside of the test case, but it
  # doesn't hurt for these examples
  class DNA
    def initialize(string)
      @string = string
      # You can provide a default value for hashes. This also avoids
      # hardcoding the letters here.
      @counts = Hash.new(0)