Update to RSpec 3 conventions and syntax

imdb.gemspec

@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'nokogiri', '= 1.6.5'
 
   s.add_development_dependency 'rake', '~> 10.0.3'
-  s.add_development_dependency 'rspec', '~> 2.13.0'
+  s.add_development_dependency 'rspec', '~> 3.0.0'
   s.add_development_dependency 'gokdok'
   s.add_development_dependency 'rdoc', '~> 4.0'
   s.add_development_dependency 'fakeweb'

spec/imdb/box_office_spec.rb

@@ -1,21 +1,20 @@
 require 'spec_helper'
 
 describe Imdb::BoxOffice do
-  before(:each) do
-    @movies = Imdb::BoxOffice.new.movies
-  end
+  subject { Imdb::BoxOffice.new.movies }
 
-  it 'should be a list of movies' do
-    @movies.each { |movie| movie.should be_an_instance_of(Imdb::Movie) }
+  it 'is list of movies' do
+    subject.each do |movie|
+      expect(movie).to be_a(Imdb::Movie)
+    end
   end
 
-  it 'should return the box office movies from IMDB.com' do
-    @movies.size.should eq(10)
+  it 'returns the box office movies from IMDB.com' do
+    expect(subject.length).to eq(10)
   end
 
-  it 'should provide array like access to the movies' do
-    @movies[0].title.should eq('Big Hero 6')
-    @movies[1].title.should eq('Interstellar')
-    @movies[2].title.should eq('Gone Girl')
+  it 'is an array like access to the movies' do
+    expected_movies = ['Big Hero 6', 'Interstellar', 'Gone Girl']
+    expect(subject.map(&:title)).to include(*expected_movies)
   end
 end

spec/imdb/episode_spec.rb

@@ -1,37 +1,35 @@
 require 'spec_helper'
 
 describe 'Imdb::Episode' do
-  before(:each) do
-    @serie = Imdb::Serie.new('1520211')
-    @season = @serie.seasons.first
-    @episode = @season.episode(2)
-  end
+  let(:serie)   { Imdb::Serie.new('1520211') }
+  let(:season)  { serie.seasons.first }
+  let(:episode) { season.episode(2) }
 
   it 'has a imdb_id' do
-    @episode.id.should == '1628064'
+    expect(episode.id).to eq('1628064')
   end
 
   it 'has a url' do
-    @episode.url.should == 'http://akas.imdb.com/title/tt1628064/combined'
+    expect(episode.url).to eq('http://akas.imdb.com/title/tt1628064/combined')
   end
 
   it 'has an episode title' do
-    @episode.title.should =~ /Guts/i
+    expect(episode.title).to match(/Guts/i)
   end
 
   it 'has the season number' do
-    @episode.season.should == 1
+    expect(episode.season).to eq(1)
   end
 
   it 'has the episode number' do
-    @episode.episode.should == 2
+    expect(episode.episode).to eq(2)
   end
 
   it 'has a plot' do
-    @episode.plot.should =~ /Rick finds himself trapped with other survivors inside a department store, surrounded by walkers/
+    expect(episode.plot).to match(/Rick finds himself trapped with other survivors inside a department store, surrounded by walkers/)
   end
 
   it 'has a original air data' do
-    @episode.air_date.should eql('7 November 2010')
+    expect(episode.air_date).to eq('7 November 2010')
   end
 end