TitleCase.rb

=begin
Define a Title class which is initialized by a String.

It has one method --fix-- that returns a title-cased version of the String:

Title.new("a title of a book").fix
#=> A Title of a Book
We will need to use conditional logic --if and else statements -- to make this work. Read the test specification carefully so you understand the conditional logic to be implemented.

Some helpful methods to use are:

String#downcase
String#capitalize
Array#include?
You can also use each_with_index to detect when you're on the first word, which should always be capitalized.
=end


test:

describe Title do
  describe "#fix" do

    it "capitalizes the first letter of each word" do
      expect( Title.new("the great gatsby").fix ).to eq("The Great Gatsby")
    end

    it "works for words with mixed cases" do
      expect( Title.new("liTTle reD Riding hOOD").fix ).to eq("Little Red Riding Hood")
    end

    it "downcases articles" do
      expect( Title.new("The lord of the rings").fix ).to eq("The Lord of the Rings")
      expect( Title.new("The sword And The stone").fix ).to eq("The Sword and the Stone")
      expect( Title.new("the portrait of a lady").fix ).to eq("The Portrait of a Lady")
    end

    it "works for strings with all uppercase characters" do
      expect( Title.new("THE SWORD AND THE STONE").fix ).to eq("The Sword and the Stone")
    end

  end
end


code:                   <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

class Title
  attr_accessor :string

  WORDS = %w( the of a and )

  def initialize(string)
    @string = string
  end

  def fix
    words = string.split(' ')
    words.map do |word|
      word = word.downcase

      if WORDS.include?(word)
        word
      else
        word.capitalize
      end
    end.join(" ")
  end

end



requirements:

=begin
Title#fix capitalizes the first letter of each word
RSpec::Expectations::ExpectationNotMetError

expected: "The Great Gatsby"
     got: "the Great Gatsby"

(compared using ==)

exercise_spec.rb:7:in `block (3 levels) in <top (required)>'

Title#fix works for words with mixed cases
Title#fix downcases articles
RSpec::Expectations::ExpectationNotMetError

expected: "The Lord of the Rings"
     got: "the Lord of the Rings"

(compared using ==)

exercise_spec.rb:15:in `block (3 levels) in <top (required)>'

Title#fix works for strings with all uppercase characters
RSpec::Expectations::ExpectationNotMetError

expected: "The Sword and the Stone"
     got: "the Sword and the Stone"

(compared using ==)

exercise_spec.rb:21:in `block (3 levels) in <top (required)>'

=end