freqencies.rb

def frequencies(text)
  result = {}
  words = text.split(" ")
  words.each do |word|
    if result.key?(word)
      result[word] +=1
    else
      result[word] = 1
    end
  end
  return result
end



my_text = File.read("ruby.txt")
words_frequencies = frequencies(my_text)
p words_frequencies.sort_by {|_key, value| value}

spec_freqencies_spec.rb

require_relative "../frequencies"

describe "#frequencies" do
  it "simple test" do
    actual = frequencies("hello boy hello")
    expected = {"hello" => 2, "boy" => 1}
    expect(actual).to eq(expected)
  end
end