83 lines
1.7 KiB
ReStructuredText
83 lines
1.7 KiB
ReStructuredText
==============
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Tombola tests
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==============
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Every concrete subclass of Tombola should pass these tests.
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Create and load instance from iterable::
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>>> balls = list(range(3))
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>>> globe = ConcreteTombola(balls)
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>>> globe.loaded()
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True
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>>> sorted(globe.inspect())
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[0, 1, 2]
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Pick and collect balls::
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>>> picks = []
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>>> picks.append(globe.pick())
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>>> picks.append(globe.pick())
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>>> picks.append(globe.pick())
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Check state and results::
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>>> globe.loaded()
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False
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>>> sorted(picks) == balls
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True
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Reload::
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>>> globe.load(balls)
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>>> globe.loaded()
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True
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>>> picks = [globe.pick() for i in balls]
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>>> globe.loaded()
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False
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Check that `LookupError` (or a subclass) is the exception
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thrown when the device is empty::
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>>> globe = ConcreteTombola([])
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>>> try:
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... globe.pick()
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... except LookupError as exc:
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... print('OK')
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OK
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Load and pick 100 balls to verify that they all come out::
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>>> balls = list(range(100))
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>>> globe = ConcreteTombola(balls)
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>>> picks = []
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>>> while globe.inspect():
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... picks.append(globe.pick())
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>>> len(picks) == len(balls)
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True
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>>> set(picks) == set(balls)
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True
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Check that the order has changed and is not simply reversed::
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>>> picks != balls
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True
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>>> picks[::-1] != balls
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True
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Note: the previous 2 tests have a *very* small chance of failing
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even if the implementation is OK. The probability of the 100
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balls coming out, by chance, in the order they were inspect is
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1/100!, or approximately 1.07e-158. It's much easier to win the
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Lotto or to become a billionaire working as a programmer.
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THE END
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