Of pytest and lru_cache in Python

levitation_test_pdb_session.py

$ tox


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# The test passes for the 1st parameterized run when ordinary_object='quill'
(Pdb) ordinary_object
'quill'
(Pdb) list
 with mock.patch(
     'levitation.cast_spell',
     autospec=True,
 ) as patched_cast_spell:
>    import pdb; pdb.set_trace()
(Pdb) levitate.cache_info()
CacheInfo(hits=0, misses=0, maxsize=2, currsize=0)
(Pdb) continue


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# The test passes for the 2nd parameterized run when ordinary_object='cushion'
(Pdb) ordinary_object
'cushion'
(Pdb) list
 with mock.patch(
     'levitation.cast_spell',
     autospec=True,
 ) as patched_cast_spell:
>    import pdb; pdb.set_trace()
(Pdb) levitate.cache_info()
CacheInfo(hits=1, misses=0, maxsize=2, currsize=1)
(Pdb) continue


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# The test fails for the 3nd parameterized run when ordinary_object='cauldron'
(Pdb) ordinary_object
'cauldron'
(Pdb) list
 with mock.patch(
     'levitation.cast_spell',
     autospec=True,
 ) as patched_cast_spell:
>    import pdb; pdb.set_trace()
(Pdb) levitate.cache_info()
CacheInfo(hits=2, misses=0, maxsize=2, currsize=2)
(Pdb) continue
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AssertionError: Expected 'cast_spell' to be called once. Called 0 times.
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