title: Is Rspec needed and why is need?
body: <p>Hi i was following rails tutorial from <a href="http://ruby.railstutorial.org/" rel="nofollow">http://ruby.railstutorial.org/</a> . I then came across chapter 3 : rspec gem and i got frustrated as my program couldn't get exactly the same thing as the tutorial. I followed every detail steps but still ended up couldn't solve the error. I then proceed with my own project and deal the problems later. </p>
  
  <p>Now i'm curious whether do i need Rspec in my program ? I mean what is it for actually ? All i see in the tutorial was it's actually like a checker ? or guideline what u're suppose to do after this steps and next.</p>