def test_apply (self): # args assert _apply(isint)([42,]) assert _apply(_all(isstring))(['jack', 'sawyer']) assert _zip(isint, _apply(_all(isstring)))(42, ['jack', 'sawyer']) # args + kwargs assert _apply(_npos(exactly=2)([42, "bad robot!"], {'jack': 4, 'kate': 15})) assert _apply(_nkw(exactly=2)([42, "bad robot!"], {'jack': 4, 'kate': 15})) assert _apply(_nargs(exactly=4)([42, "bad robot!"], {'jack': 4, 'kate': 15})) # recursive (yeah, it makes my brain hurt, too...) It's # actually pretty simple, though... It's equivalent to # _and(isstring)(chain(people)) (in other words, it's a # completely contrived example which is much more cleanly # solved in another way! :-)) # apply `isstring` to each element in an iterable. I.e., # ``_apply(_all(isstring))(['jack', 'hurley'])`` is equivalent # to ``_all(isstring)('jack', 'hurley') all_strings = _apply(_all(isstring)) # make two groups of people, then combine them group_1 = ['jack', 'sawyer'] group_2 = ['kate', 'hurley'] people = (group_1, group_2) assert _apply(_zip(all_strings, all_strings))(people)
def test_zip (self): # no predicates assert _zip()() assert _zip()(jack=4, kate=16) assert _zip()(4, 8, 15, 16, 23, 42) assert _zip()(4, 8, 15, hurley=16, locke=23) # len(predicates) == len(args) assert _zip(isstring, isempty, isnsiterable)( "bad robot!", (), (4, 8)) assert _zip(isstring, isempty, isnsiterable)( "bad robot!", (), (4, 8), kate=15, hurley=16) assert not _zip(isstring, isempty, isnsiterable)( "bad robot!", (4, 8), ()) assert not _zip(isstring, isempty, isnsiterable)( "bad robot!", (4, 8), (), kate=15, hurley=16) # len(predicates) != len(args) assert _zip(isstring)("bad robot!", (), (4, 8)) assert _zip(isstring)("bad robot!", (), (4, 8), kate=15, hurley=16) assert _zip(isstring, isempty)("bad robot!", (), (4, 8)) assert _zip(isstring, isempty)("bad robot!", (), (4, 8), kate=15, hurley=16) assert not _zip(isstring)((), (4, 8)) assert not _zip(isstring)((), (4, 8), kate=15, hurley=16) assert not _zip(isstring, isempty)("bad robot!", (4, 8), ()) assert not _zip(isstring, isempty)("bad robot!", (4, 8), (), kate=15, hurley=16)