This tests a roundtrip of customizing, changing and deleting a template-based
five/zope3 view via the ZMI:

  >>> self.setRoles(('Manager',))
  >>> browser = self.getBrowser(loggedIn=True)

First we go directly to the portal tool used to manage the view
customizations and check the overview of all registered views:

  >>> browser.open('http://nohost/plone/portal_view_customizations/registrations.html')
  >>> browser.contents
  '...Plone View Customizations...
   ...The following list shows all registered...
   ...five.customerize.interfaces.IViewTemplateContainer...
   ...<a href="@@customizezpt.html?...view_name=customizezpt.html"...
   ...customizezpt.html</a>...
   ...<a href="@@customizezpt.html?...view_name=registrations.html"...
   ...registrations.html</a>...'

Next we try to customize a view template by following the provided link. This
presents us with some information about and the contents of the template:

  >>> browser.getLink('customizezpt.html').click()
  >>> browser.url
  'http://nohost/plone/portal_view_customizations/@@customizezpt.html?...view_name=customizezpt.html...'
  >>> browser.contents
  '...The following is the source of the...customizezpt.html...
   ...<dl>...
   ...view name...customizezpt.html...
   ...registered for interface...five.customerize.interfaces.IViewTemplateContainer...
   ...registered for request type...zope.publisher.interfaces.browser.IDefaultBrowserLayer...
   ...template file...plone.app.customerize/customize.pt...
   ...zcml file...plone.app.customerize/configure.zcml...
   ...</dl>...<pre>...
   ...The following is the source of...
   ...</pre>...'

We click the "customize" button and enter some new content:

  >>> browser.getControl('Customize').click()
  >>> browser.url
  'http://nohost/plone/portal_view_customizations/five.customerize.interfaces.iviewtemplatecontainer-customizezpt.html/pt_editForm'
  >>> browser.getControl(name='text:text').value = 'you loose!'
  >>> browser.getControl('Save Changes').click()
  >>> browser.url
  'http://nohost/plone/portal_view_customizations/five.customerize.interfaces.iviewtemplatecontainer-customizezpt.html'
  >>> browser.contents
  '...Saved changes...'

Now we look at the view we just customized.  To do so we browse the view
registrations overview again and select another template for customization:

  >>> browser.getLink('portal_view_customizations').click()

<debug>

  >>> browser.handleErrors = False
  >>> from AccessControl import getSecurityManager
  >>> getSecurityManager().getUser().getRolesInContext(portal)
  ['Manager', 'Authenticated']

</debug>

  >>> browser.getLink('registrations.html').click()
  >>> browser.contents
  '...you loose!...'

This is not so helpful, so we customize the template again and thereby check
if the view registrations overview correctly links to the customized version
of the template:

  >>> browser.goBack()
  >>> browser.getLink('customizezpt.html').click()
  >>> browser.url
  'http://nohost/plone/portal_view_customizations/five.customerize.interfaces.iviewtemplatecontainer-customizezpt.html/manage_main'
  >>> browser.getControl(name='text:text').value = 'you loose, but now you know it!'
  >>> browser.getControl('Save Changes').click()
  >>> browser.contents
  '...Saved changes...'

By now we have realized we shouldn't customize just this particular template.
So, we try to get back to it's original implementation by simply deleting the
view template object again:

  >>> browser.open('http://nohost/plone/portal_view_customizations/registrations.html')
  >>> browser.getLink('Contents').click()
  >>> browser.getControl(name='ids:list').getControl(value='five.customerize.interfaces.iviewtemplatecontainer-customizezpt.html').selected = True
  >>> browser.getControl('Delete').click()
  >>> browser.url
  'http://nohost/plone/portal_view_customizations/'
  >>> browser.contents
  '...There are currently no items in...Manages view customizations...'

The template was deleted, which should have also unregistered the local
adapter.  We test that by once more trying to customize another template,
which should give us the regular pre-customization screen again:

  >>> browser.getLink('Registrations').click()
  >>> browser.getLink('registrations.html').click()
  >>> browser.contents
  '...The following is the source of the...registrations.html...'
  >>> browser.getControl('Customize')
  <SubmitControl name='' type='submit'>

