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from __future__ import absolute_import
from future.builtins.iterators import *
from future.tests.base import unittest
class TestIterators(unittest.TestCase):
def test_range(self):
self.assertNotEqual(type(range(10)), list)
self.assertEqual(sum(range(10)), 45)
self.assertTrue(9 in range(10))
self.assertEqual(list(range(5)), [0, 1, 2, 3, 4])
self.assertEqual(repr(range(10)), 'range(0, 10)')
self.assertEqual(repr(range(1, 10)), 'range(1, 10)')
self.assertEqual(repr(range(1, 1)), 'range(1, 1)')
self.assertEqual(repr(range(-10, 10, 2)), 'range(-10, 10, 2)')
def test_map(self):
def square(x):
return x**2
self.assertNotEqual(type(map(square, range(10))), list)
self.assertEqual(sum(map(square, range(10))), 285)
self.assertEqual(list(map(square, range(3))), [0, 1, 4])
def test_zip(self):
a = range(10)
b = ['a', 'b', 'c']
self.assertNotEqual(type(zip(a, b)), list)
self.assertEqual(list(zip(a, b)), [(0, 'a'), (1, 'b'), (2, 'c')])
def test_filter(self):
a = range(10)
def is_odd(x):
return x % 2 == 1
self.assertNotEqual(type(filter(is_odd, a)), list)
self.assertEqual(list(filter(is_odd, a)), [1, 3, 5, 7, 9])
if __name__ == '__main__':
unittest.main()
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