71 lines
1.4 KiB
ReStructuredText
71 lines
1.4 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 = TombolaUnderTest(balls)
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>>> globe.loaded()
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True
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Pop and collect balls::
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>>> picks = []
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>>> picks.append(globe.pop())
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>>> picks.append(globe.pop())
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>>> picks.append(globe.pop())
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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.pop() for i in balls]
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>>> globe.loaded()
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False
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Load and pop 20 balls to verify that the order has changed::
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>>> balls = list(range(20))
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>>> globe = TombolaUnderTest(balls)
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>>> picks = []
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>>> while globe.loaded():
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... picks.append(globe.pop())
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>>> len(picks) == len(balls)
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True
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>>> picks != balls
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True
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Also check that the order is not simply reversed either::
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>>> picks[::-1] != balls
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True
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Note: last 2 tests each have 1 chance in 20! (factorial) of failing even if the implementation is OK. 1/20!, or approximately 4.11e-19, is the probability of the 20 balls coming out, by chance, in the exact order the were loaded.
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Check that `LookupError` (or a subclass) is the exception thrown when the device is empty::
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>>> globe = TombolaUnderTest([])
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>>> try:
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... globe.pop()
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... except LookupError as exc:
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... print('OK')
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OK
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