title: Clean out, or reset test-database with Rspec and MongoID on Rails 3
body: <p>When I run my rspec tests, many fail due to stale data in my mongodb database. AFAIK it is far better to test with a clean database.</p>
  
  <p>With mysql, I could run <code>rake db:test:prepare</code> to clean up the database. How can I clean nd/or re-seed the database before each test?</p>