Tests for the External Editor link
==================================

  >>> from Acquisition import Implicit
  >>> from AccessControl.SecurityManagement import getSecurityManager
  >>> from Products.ExternalEditor.ExternalEditor import EditLink

  >>> class File(Implicit):
  ...    def __init__(self, id):
  ...       self.id = id
  ...    def getId(self):
  ...       return self.id
  ...    def manage_FTPget(self):
  ...       return '%s content' % self.id


  >>> ob = File('some-file').__of__(self.folder)

A user that has no permission cannot see the link:

  >>> self.logout()
  >>> getSecurityManager().getUser().getUserName()
  'Anonymous User'

  >>> EditLink(self.folder, ob)
  ''

A user that has the permission can see the link:

  >>> self.login()
  >>> self.setRoles(('Manager',))
  >>> getSecurityManager().getUser().getUserName()
  'test_user_1_'

  >>> EditLink(self.folder, ob)
  '<a href="http://nohost/test_folder_1_/externalEdit_/some-file.zem" title="Edit using external editor"><img src="/misc_/ExternalEditor/edit_icon" align="middle" hspace="2" border="0" alt="External Editor" /></a>'

Borrow Lock feature:

  >>> EditLink(self.folder, ob, borrow_lock=1)
  '<a href="http://nohost/test_folder_1_/externalEdit_/some-file.zem?borrow_lock=1" title="Edit using external editor"><img src="/misc_/ExternalEditor/edit_icon" align="middle" hspace="2" border="0" alt="External Editor" /></a>'

Skip Data feature:

  >>> EditLink(self.folder, ob, skip_data=1)
  '<a href="http://nohost/test_folder_1_/externalEdit_/some-file.zem?skip_data=1" title="Edit using external editor"><img src="/misc_/ExternalEditor/edit_icon" align="middle" hspace="2" border="0" alt="External Editor" /></a>'