title: RoR and RSpec: How to access controller instance variables without defining accessors?
body: <p>I'm writing a rspec tests for my controller and i cannot find solution following problem.
  For one of the edge case tests I need to verify the value of one instance variable.
  How can i access it without having to define the accessor? 
  By default the usual:</p>
  
  <pre><code>controller.variable.should == '3.15' 
  </code></pre>
  
  <p>doesn't work. </p>
  
  <p>Defining </p>
  
  <blockquote>
    <p>attr_reader :variable</p>
  </blockquote>
  
  <p>just to make the tests pass would be silly and
  i'm sure that there is a more inteligent way. </p>