title: Using expect and should in RSpec
body: <p>There is the following RSpec code:</p>
  
  <pre><code>it 'is not valid if name is not present' do
      @car.name = nil
      expect(@car).to be_invalid
  end
  </code></pre>
  
  <p>I read "Testing with RSpec" by Aaron Sumner now, and he writes about new styles in RSpec. Earlier I wrote the following code: </p>
  
  <pre><code>it 'is not valid if name is not present' do
      @car.name = nil
      it { should_not be_valid }
  end
  </code></pre>
  
  <p>Please, tell me, do I right? Thanks. </p>