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SF bug #681003: itertools issues

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* Fixed typo in exception message for times()
* Filled in missing times_traverse()
* Document reasons that imap() did not adopt a None fill-in feature
* Document that count(sys.maxint) will wrap-around on overflow
* Add overflow test to islice()
* Check that starmap()'s argument returns a tuple
* Verify that imap()'s tuple re-use is safe
* Make a similar tuple re-use (with safety check) for izip()
This commit is contained in:
Raymond Hettinger 2003-02-07 05:32:58 +00:00
parent 2b09bc4d57
commit 2012f174ea
3 changed files with 91 additions and 6 deletions
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3
Lib/test/test_itertools.py
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@ -1,6 +1,7 @@
import unittest
from test import test_support
from itertools import *
import sys
class TestBasicOps(unittest.TestCase):
def test_count(self):
@ -47,6 +48,7 @@ class TestBasicOps(unittest.TestCase):
import operator
self.assertEqual(list(starmap(operator.pow, zip(range(3), range(1,7)))),
[0**1, 1**2, 2**3])
self.assertRaises(TypeError, list, starmap(operator.pow, [[4,5]]))
def test_islice(self):
for args in [ # islice(args) should agree with range(args)
@ -71,6 +73,7 @@ class TestBasicOps(unittest.TestCase):
self.assertRaises(ValueError, islice, xrange(10), 1, -5, -1)
self.assertRaises(ValueError, islice, xrange(10), 1, 10, -1)
self.assertRaises(ValueError, islice, xrange(10), 1, 10, 0)
self.assertEqual(len(list(islice(count(), 1, 10, sys.maxint))), 1)
def test_takewhile(self):
data = [1, 3, 5, 20, 2, 4, 6, 8]