/usr/lib/python2.7/dist-packages/taskflow/tests/unit/test_utils_iter_utils.py is in python-taskflow 2.3.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | # -*- coding: utf-8 -*-
# Copyright (C) 2014 Yahoo! Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import string
import six
from six.moves import range as compat_range
from taskflow import test
from taskflow.utils import iter_utils
def forever_it():
i = 0
while True:
yield i
i += 1
class IterUtilsTest(test.TestCase):
def test_fill_empty(self):
self.assertEqual([], list(iter_utils.fill([1, 2, 3], 0)))
def test_bad_unique_seen(self):
iters = [
['a', 'b'],
2,
None,
object(),
]
self.assertRaises(ValueError,
iter_utils.unique_seen, iters)
def test_generate_delays(self):
it = iter_utils.generate_delays(1, 60)
self.assertEqual(1, six.next(it))
self.assertEqual(2, six.next(it))
self.assertEqual(4, six.next(it))
self.assertEqual(8, six.next(it))
self.assertEqual(16, six.next(it))
self.assertEqual(32, six.next(it))
self.assertEqual(60, six.next(it))
self.assertEqual(60, six.next(it))
def test_generate_delays_custom_multiplier(self):
it = iter_utils.generate_delays(1, 60, multiplier=4)
self.assertEqual(1, six.next(it))
self.assertEqual(4, six.next(it))
self.assertEqual(16, six.next(it))
self.assertEqual(60, six.next(it))
self.assertEqual(60, six.next(it))
def test_generate_delays_bad(self):
self.assertRaises(ValueError, iter_utils.generate_delays, -1, -1)
self.assertRaises(ValueError, iter_utils.generate_delays, -1, 2)
self.assertRaises(ValueError, iter_utils.generate_delays, 2, -1)
self.assertRaises(ValueError, iter_utils.generate_delays, 1, 1,
multiplier=0.5)
def test_unique_seen(self):
iters = [
['a', 'b'],
['a', 'c', 'd'],
['a', 'e', 'f'],
['f', 'm', 'n'],
]
self.assertEqual(['a', 'b', 'c', 'd', 'e', 'f', 'm', 'n'],
list(iter_utils.unique_seen(iters)))
def test_unique_seen_empty(self):
iters = []
self.assertEqual([], list(iter_utils.unique_seen(iters)))
def test_unique_seen_selector(self):
iters = [
[(1, 'a'), (1, 'a')],
[(2, 'b')],
[(3, 'c')],
[(1, 'a'), (3, 'c')],
]
it = iter_utils.unique_seen(iters,
seen_selector=lambda value: value[0])
self.assertEqual([(1, 'a'), (2, 'b'), (3, 'c')], list(it))
def test_bad_fill(self):
self.assertRaises(ValueError, iter_utils.fill, 2, 2)
def test_fill_many_empty(self):
result = list(iter_utils.fill(compat_range(0, 50), 500))
self.assertEqual(450, sum(1 for x in result if x is None))
self.assertEqual(50, sum(1 for x in result if x is not None))
def test_fill_custom_filler(self):
self.assertEqual("abcd",
"".join(iter_utils.fill("abc", 4, filler='d')))
def test_fill_less_needed(self):
self.assertEqual("ab", "".join(iter_utils.fill("abc", 2)))
def test_fill(self):
self.assertEqual([None, None], list(iter_utils.fill([], 2)))
self.assertEqual((None, None), tuple(iter_utils.fill([], 2)))
def test_bad_find_first_match(self):
self.assertRaises(ValueError,
iter_utils.find_first_match, 2, lambda v: False)
def test_find_first_match(self):
it = forever_it()
self.assertEqual(100, iter_utils.find_first_match(it,
lambda v: v == 100))
def test_find_first_match_not_found(self):
it = iter(string.ascii_lowercase)
self.assertIsNone(iter_utils.find_first_match(it,
lambda v: v == ''))
def test_bad_count(self):
self.assertRaises(ValueError, iter_utils.count, 2)
def test_count(self):
self.assertEqual(0, iter_utils.count([]))
self.assertEqual(1, iter_utils.count(['a']))
self.assertEqual(10, iter_utils.count(compat_range(0, 10)))
self.assertEqual(1000, iter_utils.count(compat_range(0, 1000)))
self.assertEqual(0, iter_utils.count(compat_range(0)))
self.assertEqual(0, iter_utils.count(compat_range(-1)))
def test_bad_while_is_not(self):
self.assertRaises(ValueError, iter_utils.while_is_not, 2, 'a')
def test_while_is_not(self):
it = iter(string.ascii_lowercase)
self.assertEqual(['a'],
list(iter_utils.while_is_not(it, 'a')))
it = iter(string.ascii_lowercase)
self.assertEqual(['a', 'b'],
list(iter_utils.while_is_not(it, 'b')))
self.assertEqual(list(string.ascii_lowercase[2:]),
list(iter_utils.while_is_not(it, 'zzz')))
it = iter(string.ascii_lowercase)
self.assertEqual(list(string.ascii_lowercase),
list(iter_utils.while_is_not(it, '')))
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