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test_count.py
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57 lines (46 loc) · 1.5 KB
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# -*- coding: utf-8 -*-
"""
Tests for the backported class:`range` class.
"""
from itertools import count as it_count
from future.backports.misc import count
from future.tests.base import unittest, skip26
class CountTest(unittest.TestCase):
"""Test the count function."""
def _test_count_func(self, func):
self.assertEqual(next(func(1)), 1)
self.assertEqual(next(func(start=1)), 1)
c = func()
self.assertEqual(next(c), 0)
self.assertEqual(next(c), 1)
self.assertEqual(next(c), 2)
c = func(1, 1)
self.assertEqual(next(c), 1)
self.assertEqual(next(c), 2)
c = func(step=1)
self.assertEqual(next(c), 0)
self.assertEqual(next(c), 1)
c = func(start=1, step=1)
self.assertEqual(next(c), 1)
self.assertEqual(next(c), 2)
c = func(-1)
self.assertEqual(next(c), -1)
self.assertEqual(next(c), 0)
self.assertEqual(next(c), 1)
c = func(1, -1)
self.assertEqual(next(c), 1)
self.assertEqual(next(c), 0)
self.assertEqual(next(c), -1)
c = func(-1, -1)
self.assertEqual(next(c), -1)
self.assertEqual(next(c), -2)
self.assertEqual(next(c), -3)
def test_count(self):
"""Test the count function."""
self._test_count_func(count)
@skip26
def test_own_count(self):
"""Test own count implementation."""
self._test_count_func(it_count)
if __name__ == '__main__':
unittest.main()