tdd_word_analytics.rb

class TddWordAnalytics
  attr_reader :sentence
  def initialize(sentence)
    @sentence = sentence
  end

  def analytics
   analytic = []
   word = word_count.sort { |a,b| b[1]<=>a[1] }[0..1]
   word = word.map do |word|
     word[0]
   end

   letter = letter_count.sort { |a,b| b[1]<=>a[1] }[0..2]
   letter = letter.map do |letter|
     letter[0]
   end
   analytic << word
   analytic << letter
   analytic
  end

  def word_count
    counter = Hash.new(0)
    sentence.split(' ').each do |word|
      counter[word] += 1
    end
    counter
  end

  def letter_count
    counter = Hash.new(0)
    sentence.split('').each do |letter|
      if letter.match(/[a-zA-Z]/) != nil
        letter = letter.downcase
        counter[letter] += 1
      end
    end
    counter
  end

  def symbol_count
    counter = Hash.new(0)
    sentence.split('').each do |letter|
      if letter.match(/[^A-Za-z0-9_\s\t\r\n\f]/)
        counter[letter] += 1
      end
    end
    counter
  end
end

tdd_word_analytics_rspec.rb

require './tdd_word_analytics'

describe TddWordAnalytics do
  describe '#word' do
    it 'counts the number for each word' do
      expect(TddWordAnalytics.new('Hello').word_count).to eql({"Hello"=>1})
    end

    it 'counts parses words in a sentence and give it a counter' do
      expect(TddWordAnalytics.new('This is my script').word_count).to eql({'This'=>1, 'is'=>1, 'my'=>1, 'script'=>1})
    end
  end

  describe '#letter' do
    it 'counts how many times a given letter is used regardless of capitalization' do
      expect(TddWordAnalytics.new('Hello').letter_count).to include({'h'=>1, 'e'=>1, 'l'=>2, 'o'=>1})
    end

    it 'only reads in letters' do
      expect(TddWordAnalytics.new('5 days').letter_count).to include({'d'=>1, 'a'=>1, 'y'=>1, 's'=>1})
    end
  end

  describe '#non_letter' do
    it 'counts how many times any non_letter symbol is used excluding white space' do
      expect(TddWordAnalytics.new("5# y'ea").symbol_count).to include({'#'=>1, "'"=>1})
    end
  end

  describe '#analytics' do
    tdd = TddWordAnalytics.new("What is up up")

    it 'outputs the most common word and letter' do
      expect(tdd.analytics).to match_array([['up','is'],['p','u','i']])
    end
  end
end