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from unittest import SkipTest
from nose.tools import assert_raises
from six.moves import zip
from picklable_itertools.extras import (partition, partition_all,
IterableLengthMismatch, equizip,
interleave, roundrobin)
from . import verify_same, verify_pickle
def test_partition():
try:
from toolz import itertoolz
except ImportError:
raise SkipTest()
for obj, ref in zip([partition, partition_all],
[itertoolz.partition, itertoolz.partition_all]):
yield verify_same, obj, ref, None, 2, [5, 9, 2, 6]
yield verify_same, obj, ref, None, 2, [5, 9, 2], 3
yield verify_same, obj, ref, None, 3, [5], 'a'
yield verify_same, obj, ref, None, 3, [5, 9, 2, 9, 2]
yield verify_same, obj, ref, None, 3, [5, 9, 2, 9, 2]
yield verify_pickle, obj, ref, 2, 1, 3, [5, 9, 2, 9, 2, 4, 3]
def test_equizip():
yield verify_same, equizip, zip, None, [3, 4], [9, 2], [9, 9]
yield verify_same, equizip, zip, None, [3, 4, 8, 4, 2]
assert_raises(IterableLengthMismatch, list, equizip([5, 4, 3], [2, 1]))
assert_raises(IterableLengthMismatch, list, equizip([5, 4, 3], []))
def test_roundrobin():
assert list(roundrobin('ABC', 'D', 'EF')) == list('ADEBFC')
assert (list(roundrobin('ABCDEF', 'JK', 'GHI', 'L')) ==
list('AJGLBKHCIDEF'))
def test_interleave():
assert list(interleave(['ABC', 'D', 'EF'])) == list('ADEBFC')
assert (list(interleave(['ABCDEF', 'JK', 'GHI', 'L'])) ==
list('AJGLBKHCIDEF'))
class StupidException(Exception):
pass
def stupid_gen():
yield 'A'
yield 'B'
raise StupidException
assert (list(interleave(['ABCDEF', stupid_gen()], [StupidException])) ==
list('AABBCDEF'))
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