title: Ruby testing: printing inside a test case
body: <p>I'm brand new to Ruby testing and Google isn't helping.</p>
  
  <p>Using Test/Unit, how can I print an instance variable, like</p>
  
  <pre><code>test "thing to happen" do
    do_stuff
    assert_equal "foo", @variable
    p @varible
  end
  </code></pre>