======================================================================
FAIL: test_add_action_level (__main__.TestPlanningGraphLevels)
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Traceback (most recent call last):
  File "test_my_planning_graph.py", line 24, in test_add_action_level
    self.assertEqual(len(self.pg.a_levels[0]), 3, len(self.pg.a_levels[0]))
AssertionError: 5 != 3 : 5

======================================================================
FAIL: test_add_literal_level (__main__.TestPlanningGraphLevels)
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Traceback (most recent call last):
  File "test_my_planning_graph.py", line 32, in test_add_literal_level
    self.assertEqual(len(self.pg.s_levels[1]), 4, len(self.pg.s_levels[1]))
AssertionError: 0 != 4 : 0

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Ran 9 tests in 0.014s

FAILED (failures=2)