'An update with the same key as a previous one delays wiping.'

def test_update_with_same_key(self):

    service = self.service()
    service.apply_changes([self.WITH_APPS])
    advance_some(self.clock)
    service.apply_changes([self.WITH_APPS])
    advance_rest(self.clock)
    self.assertEqual(service.as_deployment(), DeploymentState(nodes=[self.WITH_APPS]))
