RSpec Let

let_spec.rb

describe 'rspec' do                                                                                                                                                               
  let(:sentance) { 'hello' }                                                                                                                                                      
                                                                                                                                                                                  
  it "returns 'hello'" do                                                                                                                                                         
    sentance.should == 'hello'                                                                                                                                                    
  end                                                                                                                                                                             
                                                                                                                                                                                  
  context 'with another word' do                                                                                                                                                  
    let(:sentance) { sentance + ' world' }                                                                                                                                        
                                                                                                                                                                                  
    it 'blows up the stack' do                                                                                                                                       
      sentance.should == 'hello world'                                                                                                                                            
    end                                                                                                                                                                           
  end                                                                                                                                                                             
end