title: Test cases in Weka
body: <p>Given that I may have an ARFF file that is written in the following form:</p>
  
  <pre><code>@relation spamOrNot
  @attribute body String
  @attribute result {spam, notspam}
  "free money now!", spam
  "hi meet me at 10", notspam
  </code></pre>
  
  <p>And I were to run this to train a Naive Bayes Classifier on Weka. How would I create a test-set so that this trained classifier would be able to make predictions? Thanks.</p>