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ch25: sentinel metaclass example

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This commit is contained in:
Luciano Ramalho
2021-05-23 22:30:40 -03:00
parent 8d882d9560
commit 493b0d2a56
1 changed files with 11 additions and 4 deletions
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13
25-class-metaprog/sentinel/sentinel_test.py
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@@ -1,3 +1,5 @@
import pickle
from sentinel import Sentinel from sentinel import Sentinel
class PlainSentinel(Sentinel): pass class PlainSentinel(Sentinel): pass
@@ -12,12 +14,17 @@ def test_repr():
def test_pickle(): def test_pickle():
from pickle import dumps, loads s = pickle.dumps(PlainSentinel)
s = dumps(PlainSentinel) ps = pickle.loads(s)
ps = loads(s)
assert ps is PlainSentinel assert ps is PlainSentinel
def test_custom_repr(): def test_custom_repr():
assert repr(SentinelCustomRepr) == '***SentinelRepr***' assert repr(SentinelCustomRepr) == '***SentinelRepr***'
def test_sentinel_comes_ready_to_use():
assert repr(Sentinel) == 'Sentinel'
s = pickle.dumps(Sentinel)
ps = pickle.loads(s)
assert ps is Sentinel