title: is Rails.cache purged between tests?
body: <p>We cache id/path mapping using <code>Rails.cache</code> in a Rails 3.2 app. On some machines it works OK, but on the others values are wrong. The cause is hard to track so I have some questions about the <code>Rails.cache</code> itself. Is it purged between tests? Is it possible that values cached in development mode is used in test mode? If it's not purged, how could I do it before running specs?</p>
  
  <p>My cache store is configuration is:</p>
  
  <pre><code>#in: config/environments/development.rb
  config.cache_store = :memory_store, {:size =&gt; 64.megabytes}
  
  #in: config/environments/production.rb
  # config.cache_store = :mem_cache_store
  </code></pre>