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|
""" Test that functions are reasonably behaved with None as input.
Typed Cython objects (like dict) may also be None. Using functions from
Python's C API that expect a specific type but receive None instead can cause
problems such as throwing an uncatchable SystemError (and some systems may
segfault instead). We obviously don't what that to happen! As the tests
below discovered, this turned out to be a rare occurence. The only changes
required were to use `d.copy()` instead of `PyDict_Copy(d)`, and to always
return Python objects from functions instead of int or bint (so exceptions
can propagate).
The vast majority of functions throw TypeError. The vast majority of
functions also behave the same in `toolz` and `cytoolz`. However, there
are a few minor exceptions. Since passing None to functions are edge cases
that don't have well-established behavior yet (other than raising TypeError),
the tests in this file serve to verify that the behavior is at least
reasonably well-behaved and don't cause SystemErrors.
"""
# XXX: This file could be back-ported to `toolz` once unified testing exists.
import cytoolz
from cytoolz import *
from cytoolz.utils import raises
from operator import add
class GenException(object):
def __init__(self, exc):
self.exc = exc
def __iter__(self):
return self
def __next__(self):
raise self.exc
def next(self):
raise self.exc
def test_dicttoolz():
tested = []
assert raises((TypeError, AttributeError), lambda: assoc(None, 1, 2))
tested.append('assoc')
assert raises((TypeError, AttributeError), lambda: dissoc(None, 1))
tested.append('dissoc')
# XXX
assert (raises(TypeError, lambda: get_in(None, {})) or
get_in(None, {}) is None)
assert raises(TypeError, lambda: get_in(None, {}, no_default=True))
assert get_in([0, 1], None) is None
assert raises(TypeError, lambda: get_in([0, 1], None, no_default=True))
tested.append('get_in')
assert raises(TypeError, lambda: keyfilter(None, {1: 2}))
assert raises((AttributeError, TypeError), lambda: keyfilter(identity, None))
tested.append('keyfilter')
# XXX
assert (raises(TypeError, lambda: keymap(None, {1: 2})) or
keymap(None, {1: 2}) == {(1,): 2})
assert raises((AttributeError, TypeError), lambda: keymap(identity, None))
tested.append('keymap')
assert raises(TypeError, lambda: merge(None))
assert raises((TypeError, AttributeError), lambda: merge(None, None))
tested.append('merge')
assert raises(TypeError, lambda: merge_with(None, {1: 2}, {3: 4}))
assert raises(TypeError, lambda: merge_with(identity, None))
assert raises((TypeError, AttributeError),
lambda: merge_with(identity, None, None))
tested.append('merge_with')
assert raises(TypeError, lambda: update_in({1: {2: 3}}, [1, 2], None))
assert raises(TypeError, lambda: update_in({1: {2: 3}}, None, identity))
assert raises((TypeError, AttributeError),
lambda: update_in(None, [1, 2], identity))
tested.append('update_in')
assert raises(TypeError, lambda: valfilter(None, {1: 2}))
assert raises((AttributeError, TypeError), lambda: valfilter(identity, None))
tested.append('valfilter')
# XXX
assert (raises(TypeError, lambda: valmap(None, {1: 2})) or
valmap(None, {1: 2}) == {1: (2,)})
assert raises((AttributeError, TypeError), lambda: valmap(identity, None))
tested.append('valmap')
assert (raises(TypeError, lambda: itemmap(None, {1: 2})) or
itemmap(None, {1: 2}) == {1: (2,)})
assert raises((AttributeError, TypeError), lambda: itemmap(identity, None))
tested.append('itemmap')
assert raises(TypeError, lambda: itemfilter(None, {1: 2}))
assert raises((AttributeError, TypeError), lambda: itemfilter(identity, None))
tested.append('itemfilter')
assert raises((AttributeError, TypeError), lambda: assoc_in(None, [2, 2], 3))
assert raises(TypeError, lambda: assoc_in({}, None, 3))
tested.append('assoc_in')
s1 = set(tested)
s2 = set(cytoolz.dicttoolz.__all__)
assert s1 == s2, '%s not tested for being None-safe' % ', '.join(s2 - s1)
def test_functoolz():
tested = []
assert raises(TypeError, lambda: complement(None)())
tested.append('complement')
assert compose(None) is None
assert raises(TypeError, lambda: compose(None, None)())
tested.append('compose')
assert compose_left(None) is None
assert raises(TypeError, lambda: compose_left(None, None)())
tested.append('compose_left')
assert raises(TypeError, lambda: curry(None))
tested.append('curry')
assert raises(TypeError, lambda: do(None, 1))
tested.append('do')
assert identity(None) is None
tested.append('identity')
assert raises(TypeError, lambda: juxt(None))
assert raises(TypeError, lambda: list(juxt(None, None)()))
tested.append('juxt')
assert memoize(identity, key=None)(1) == 1
assert memoize(identity, cache=None)(1) == 1
tested.append('memoize')
assert raises(TypeError, lambda: pipe(1, None))
tested.append('pipe')
assert thread_first(1, None) is None
tested.append('thread_first')
assert thread_last(1, None) is None
tested.append('thread_last')
assert flip(lambda a, b: (a, b))(None)(None) == (None, None)
tested.append('flip')
assert apply(identity, None) is None
assert raises(TypeError, lambda: apply(None))
tested.append('apply')
excepts(None, lambda x: x)
excepts(TypeError, None)
tested.append('excepts')
s1 = set(tested)
s2 = set(cytoolz.functoolz.__all__)
assert s1 == s2, '%s not tested for being None-safe' % ', '.join(s2 - s1)
def test_itertoolz():
tested = []
assert raises(TypeError, lambda: list(accumulate(None, [1, 2])))
assert raises(TypeError, lambda: list(accumulate(identity, None)))
tested.append('accumulate')
assert raises(TypeError, lambda: concat(None))
assert raises(TypeError, lambda: list(concat([None])))
tested.append('concat')
assert raises(TypeError, lambda: list(concatv(None)))
tested.append('concatv')
assert raises(TypeError, lambda: list(cons(1, None)))
tested.append('cons')
assert raises(TypeError, lambda: count(None))
tested.append('count')
# XXX
assert (raises(TypeError, lambda: list(drop(None, [1, 2]))) or
list(drop(None, [1, 2])) == [1, 2])
assert raises(TypeError, lambda: list(drop(1, None)))
tested.append('drop')
assert raises(TypeError, lambda: first(None))
tested.append('first')
assert raises(TypeError, lambda: frequencies(None))
tested.append('frequencies')
assert raises(TypeError, lambda: get(1, None))
assert raises(TypeError, lambda: get([1, 2], None))
tested.append('get')
assert raises(TypeError, lambda: groupby(None, [1, 2]))
assert raises(TypeError, lambda: groupby(identity, None))
tested.append('groupby')
assert raises(TypeError, lambda: list(interleave(None)))
assert raises(TypeError, lambda: list(interleave([None, None])))
assert raises(TypeError,
lambda: list(interleave([[1, 2], GenException(ValueError)],
pass_exceptions=None)))
tested.append('interleave')
assert raises(TypeError, lambda: list(interpose(1, None)))
tested.append('interpose')
assert raises(TypeError, lambda: isdistinct(None))
tested.append('isdistinct')
assert isiterable(None) is False
tested.append('isiterable')
assert raises(TypeError, lambda: list(iterate(None, 1)))
tested.append('iterate')
assert raises(TypeError, lambda: last(None))
tested.append('last')
# XXX
assert (raises(TypeError, lambda: list(mapcat(None, [[1], [2]]))) or
list(mapcat(None, [[1], [2]])) == [[1], [2]])
assert raises(TypeError, lambda: list(mapcat(identity, [None, [2]])))
assert raises(TypeError, lambda: list(mapcat(identity, None)))
tested.append('mapcat')
assert raises(TypeError, lambda: list(merge_sorted(None, [1, 2])))
tested.append('merge_sorted')
assert raises(TypeError, lambda: nth(None, [1, 2]))
assert raises(TypeError, lambda: nth(0, None))
tested.append('nth')
assert raises(TypeError, lambda: partition(None, [1, 2, 3]))
assert raises(TypeError, lambda: partition(1, None))
tested.append('partition')
assert raises(TypeError, lambda: list(partition_all(None, [1, 2, 3])))
assert raises(TypeError, lambda: list(partition_all(1, None)))
tested.append('partition_all')
assert raises(TypeError, lambda: list(pluck(None, [[1], [2]])))
assert raises(TypeError, lambda: list(pluck(0, [None, [2]])))
assert raises(TypeError, lambda: list(pluck(0, None)))
tested.append('pluck')
assert raises(TypeError, lambda: reduceby(None, add, [1, 2, 3], 0))
assert raises(TypeError, lambda: reduceby(identity, None, [1, 2, 3], 0))
assert raises(TypeError, lambda: reduceby(identity, add, None, 0))
tested.append('reduceby')
assert raises(TypeError, lambda: list(remove(None, [1, 2])))
assert raises(TypeError, lambda: list(remove(identity, None)))
tested.append('remove')
assert raises(TypeError, lambda: second(None))
tested.append('second')
# XXX
assert (raises(TypeError, lambda: list(sliding_window(None, [1, 2, 3]))) or
list(sliding_window(None, [1, 2, 3])) == [])
assert raises(TypeError, lambda: list(sliding_window(1, None)))
tested.append('sliding_window')
# XXX
assert (raises(TypeError, lambda: list(take(None, [1, 2])) == [1, 2]) or
list(take(None, [1, 2])) == [1, 2])
assert raises(TypeError, lambda: list(take(1, None)))
tested.append('take')
# XXX
assert (raises(TypeError, lambda: list(tail(None, [1, 2])) == [1, 2]) or
list(tail(None, [1, 2])) == [1, 2])
assert raises(TypeError, lambda: list(tail(1, None)))
tested.append('tail')
# XXX
assert (raises(TypeError, lambda: list(take_nth(None, [1, 2]))) or
list(take_nth(None, [1, 2])) == [1, 2])
assert raises(TypeError, lambda: list(take_nth(1, None)))
tested.append('take_nth')
assert raises(TypeError, lambda: list(unique(None)))
assert list(unique([1, 1, 2], key=None)) == [1, 2]
tested.append('unique')
assert raises(TypeError, lambda: join(first, None, second, (1, 2, 3)))
assert raises(TypeError, lambda: join(first, (1, 2, 3), second, None))
tested.append('join')
assert raises(TypeError, lambda: topk(None, [1, 2, 3]))
assert raises(TypeError, lambda: topk(3, None))
tested.append('topk')
assert raises(TypeError, lambda: list(diff(None, [1, 2, 3])))
assert raises(TypeError, lambda: list(diff(None)))
assert raises(TypeError, lambda: list(diff([None])))
assert raises(TypeError, lambda: list(diff([None, None])))
tested.append('diff')
assert raises(TypeError, lambda: peek(None))
tested.append('peek')
assert raises(TypeError, lambda: peekn(None, [1, 2, 3]))
assert raises(TypeError, lambda: peekn(3, None))
tested.append('peekn')
assert raises(TypeError, lambda: list(random_sample(None, [1])))
assert raises(TypeError, lambda: list(random_sample(0.1, None)))
tested.append('random_sample')
s1 = set(tested)
s2 = set(cytoolz.itertoolz.__all__)
assert s1 == s2, '%s not tested for being None-safe' % ', '.join(s2 - s1)
def test_recipes():
tested = []
# XXX
assert (raises(TypeError, lambda: countby(None, [1, 2])) or
countby(None, [1, 2]) == {(1,): 1, (2,): 1})
assert raises(TypeError, lambda: countby(identity, None))
tested.append('countby')
# XXX
assert (raises(TypeError, lambda: list(partitionby(None, [1, 2]))) or
list(partitionby(None, [1, 2])) == [(1,), (2,)])
assert raises(TypeError, lambda: list(partitionby(identity, None)))
tested.append('partitionby')
s1 = set(tested)
s2 = set(cytoolz.recipes.__all__)
assert s1 == s2, '%s not tested for being None-safe' % ', '.join(s2 - s1)
|
