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test_split_into.py
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test_split_into.py
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from unittest import TestCase
from split_into import split_into
class SplitIntoTests(TestCase):
def test_iterable_just_right(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7, 8, 9],
sizes=[2, 3, 4]
))
expected = [[1, 2], [3, 4, 5], [6, 7, 8, 9]]
self.assertEqual(actual, expected)
def test_iterable_too_small(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7],
sizes=[2, 3, 4]
))
expected = [[1, 2], [3, 4, 5], [6, 7]]
self.assertEqual(actual, expected)
def test_iterable_too_small_extra(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7],
sizes=[2, 3, 4, 5]
))
expected = [[1, 2], [3, 4, 5], [6, 7], []]
self.assertEqual(actual, expected)
def test_iterable_too_large(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7, 8, 9],
sizes=[2, 3, 2]
))
expected = [[1, 2], [3, 4, 5], [6, 7]]
self.assertEqual(actual, expected)
def test_using_none_with_leftover(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7, 8, 9],
sizes=[2, 3, None]
))
expected = [[1, 2], [3, 4, 5], [6, 7, 8, 9]]
self.assertEqual(actual, expected)
def test_using_none_without_leftover(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7, 8, 9],
sizes=[2, 3, 4, None]
))
expected = [[1, 2], [3, 4, 5], [6, 7, 8, 9], []]
self.assertEqual(actual, expected)
def test_using_none_mid_sizes(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7, 8, 9],
sizes=[2, 3, None, 4]
))
expected = [[1, 2], [3, 4, 5], [6, 7, 8, 9]]
self.assertEqual(actual, expected)
def test_iterable_empty(self):
actual = list(
split_into(
iterable=[],
sizes=[2, 4, 2]
))
expected = [[], [], []]
self.assertEqual(actual, expected)
def test_iterable_empty_using_none(self):
actual = list(
split_into(
iterable=[],
sizes=[2, 4, None, 2]
))
expected = [[], [], []]
self.assertEqual(actual, expected)
def test_sizes_empty(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7, 8, 9],
sizes=[]
))
expected = []
self.assertEqual(actual, expected)
def test_test_both_empty(self):
actual = list(
split_into(
iterable=[],
sizes=[]
))
expected = []
self.assertEqual(actual, expected)
def test_test_bool_in_sizes(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7, 8, 9],
sizes=[3, True, 2, False]
))
expected = [[1, 2, 3], [4], [5, 6], []]
self.assertEqual(actual, expected)
def test_test_invalid_in_sizes(self):
with self.assertRaises(ValueError):
list(split_into(
iterable=[1, 2, 3, 4, 5, 6, 7, 8, 9],
sizes=[1, [], 3]
))
def test_invalid_in_sizes_after_none(self):
actual = list(
split_into(
iterable=[1, 2, 3, 4, 5, 6, 7, 8, 9],
sizes=[3, 4, None, []]
))
expected = [[1, 2, 3], [4, 5, 6, 7], [8, 9]]
self.assertEqual(actual, expected)
def test_generator_iterable_integrity(self):
iterable = (i for i in range(10))
sizes=[2, 3]
actual = list(split_into(iterable, sizes))
expected = [[0, 1], [2, 3, 4]]
self.assertEqual(actual, expected)
iterable_actual = list(iterable)
iterable_expected = [5, 6, 7, 8, 9]
self.assertEqual(iterable_actual, iterable_expected)
def test_generator_sizes_integrity(self):
iterable = [1, 2, 3, 4, 5, 6, 7, 8, 9]
sizes=(i for i in [1, 2, None, 3, 4])
actual = list(split_into(iterable, sizes))
expected = [[1], [2, 3], [4, 5, 6, 7, 8, 9]]
self.assertEqual(actual, expected)
sizes_expected = [3, 4]
sizes_actual = list(sizes)
self.assertEqual(sizes_actual, sizes_expected)