'Test that manage_existing returns successfully.'

def test_manage_existing(self):

    self.driver.do_setup(None)
    self.driver.create_volume(MANAGED_VOLUME)
    existing_ref = {'source-name': MANAGED_VOLUME['name']}
    self.driver.manage_existing(VOLUME, existing_ref)
    self.assertEqual(MANAGED_VOLUME['size'], VOLUME['size'])
    self.driver.delete_volume(VOLUME)
    self.driver.delete_volume(MANAGED_VOLUME)
