title: How do you run a single test/spec file in RSpec?
body: <p>I want to be able to run a single spec file's tests &mdash; for the one file I'm editing, for example.  <code>rake spec</code> executes all the specs.  My project is not a Rails project, so <code>rake spec:doc</code> doesn't work.</p>
  
  <p>Don't know if this matters, but here is my directory structure.</p>
  
  <pre>
  ./Rakefile
  ./lib
  ./lib/cushion.rb
  ./lib/cushion
  ./lib/cushion/doc.rb
  ./lib/cushion/db.rb
  ./spec
  ./spec/spec.opts
  ./spec/spec_helper.rb
  ./spec/db_spec.rb
  </pre>