title: Groovy conventions: Where do I put metaClass definitions?
body: <p>I'm starting to add some Groovy classes to an existing Java web app.  (This is not a Grails app)</p>
  
  <p>Is there a convention I should follow as to where I define my metaClass extensions?</p>
  
  <p>Also, I've written a handful of extensions for assisting with unit tests.  Currently, these sit in the <code>@Before</code> of the base class for the tests, but I suspect there's a more obvious place I should be setting these up.</p>
  
  <p>Any advice greatly appreciated.</p>