b1c22dc2e2
This adjusted variant creates the same output but is hopefully easier to understand and follow than the recursive version. This version is also not limited by the python stack limit which is a general good thing to avoid being limited by. It also adds a bunch of tests to make sure the format is as expected under various tree structures. Change-Id: I2ae42c7c1bf72794800929250bcf6ccbe658230b
63 lines
2.3 KiB
Python
63 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2014 Yahoo! Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import string
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from six.moves import range as compat_range
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from taskflow import test
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from taskflow.utils import iter_utils
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def forever_it():
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i = 0
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while True:
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yield i
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i += 1
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class IterUtilsTest(test.TestCase):
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def test_find_first_match(self):
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it = forever_it()
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self.assertEqual(100, iter_utils.find_first_match(it,
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lambda v: v == 100))
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def test_find_first_match_not_found(self):
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it = iter(string.ascii_lowercase)
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self.assertIsNone(iter_utils.find_first_match(it,
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lambda v: v == ''))
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def test_count(self):
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self.assertEqual(0, iter_utils.count([]))
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self.assertEqual(1, iter_utils.count(['a']))
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self.assertEqual(10, iter_utils.count(compat_range(0, 10)))
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self.assertEqual(1000, iter_utils.count(compat_range(0, 1000)))
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self.assertEqual(0, iter_utils.count(compat_range(0)))
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self.assertEqual(0, iter_utils.count(compat_range(-1)))
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def test_while_is_not(self):
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it = iter(string.ascii_lowercase)
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self.assertEqual(['a'],
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list(iter_utils.while_is_not(it, 'a')))
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it = iter(string.ascii_lowercase)
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self.assertEqual(['a', 'b'],
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list(iter_utils.while_is_not(it, 'b')))
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self.assertEqual(list(string.ascii_lowercase[2:]),
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list(iter_utils.while_is_not(it, 'zzz')))
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it = iter(string.ascii_lowercase)
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self.assertEqual(list(string.ascii_lowercase),
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list(iter_utils.while_is_not(it, '')))
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