'Tests the get_plug_point_class_instances function.'

def test_get_plug_point_class_instances(self):

    lcp_mappings = [('A::B::C1', TestLifecycleCallout1)]
    self.mock_lcp_class_map(lcp_mappings)
    pp_cinstances = lifecycle_plugin_utils.get_plug_point_class_instances()
    self.assertIsNotNone(pp_cinstances)
    self.assertTrue(self.is_iterable(pp_cinstances), ('not    iterable:    %s' % pp_cinstances))
    self.assertEqual(1, len(pp_cinstances))
    self.assertEqual(TestLifecycleCallout1, pp_cinstances[0].__class__)
