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18 lines
372 B
Python
18 lines
372 B
Python
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from monads.maybe import Just, Nothing, maybe
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def test_maybe_none():
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assert isinstance(maybe(None), Nothing)
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def test_maybe_something():
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assert isinstance(maybe(False), Just)
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def test_maybe_boolean_false():
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assert isinstance(maybe(False, predicate=bool), Nothing)
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def test_maybe_boolean_true():
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assert isinstance(maybe(True, predicate=bool), Just)
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