[Python-checkins] python/dist/src/Lib/test test_itertools.py,NONE,1.1

2003年1月31日 16:10:11 -0800

Update of /cvsroot/python/python/dist/src/Lib/test
In directory sc8-pr-cvs1:/tmp/cvs-serv25990/Lib/test
Added Files:
	test_itertools.py 
Log Message:
Move itertools module from the sandbox and into production.
--- NEW FILE: test_itertools.py ---
import unittest
from test import test_support
from itertools import *
class TestBasicOps(unittest.TestCase):
 def test_count(self):
 self.assertEqual(zip('abc',count()), [('a', 0), ('b', 1), ('c', 2)])
 self.assertEqual(zip('abc',count(3)), [('a', 3), ('b', 4), ('c', 5)])
 self.assertRaises(TypeError, count, 2, 3)
 def test_ifilter(self):
 def isEven(x):
 return x%2==0
 self.assertEqual(list(ifilter(isEven, range(6))), [0,2,4])
 self.assertEqual(list(ifilter(isEven, range(6), True)), [1,3,5])
 self.assertEqual(list(ifilter(None, [0,1,0,2,0])), [1,2])
 self.assertRaises(TypeError, ifilter)
 self.assertRaises(TypeError, ifilter, 3)
 self.assertRaises(TypeError, ifilter, isEven, 3)
 self.assertRaises(TypeError, ifilter, isEven, [3], True, 4)
 def test_izip(self):
 ans = [(x,y) for x, y in izip('abc',count())]
 self.assertEqual(ans, [('a', 0), ('b', 1), ('c', 2)])
 self.assertRaises(TypeError, izip)
 def test_repeat(self):
 self.assertEqual(zip(xrange(3),repeat('a')),
 [(0, 'a'), (1, 'a'), (2, 'a')])
 self.assertRaises(TypeError, repeat)
 def test_times(self):
 self.assertEqual(list(times(3)), [None]*3)
 self.assertEqual(list(times(3, True)), [True]*3)
 self.assertRaises(ValueError, times, -1)
 def test_imap(self):
 import operator
 self.assertEqual(list(imap(operator.pow, range(3), range(1,7))),
 [0**1, 1**2, 2**3])
 self.assertEqual(list(imap(None, 'abc', range(5))),
 [('a',0),('b',1),('c',2)])
 self.assertRaises(TypeError, imap)
 self.assertRaises(TypeError, imap, operator.neg)
 def test_starmap(self):
 import operator
 self.assertEqual(list(starmap(operator.pow, zip(range(3), range(1,7)))),
 [0**1, 1**2, 2**3])
 def test_islice(self):
 for args in [ # islice(args) should agree with range(args)
 (10, 20, 3),
 (10, 3, 20),
 (10, 20),
 (10, 3),
 (20,)
 ]:
 self.assertEqual(list(islice(xrange(100), *args)), range(*args))
 for args, tgtargs in [ # Stop when seqn is exhausted
 ((10, 110, 3), ((10, 100, 3))),
 ((10, 110), ((10, 100))),
 ((110,), (100,))
 ]:
 self.assertEqual(list(islice(xrange(100), *args)), range(*tgtargs))
 self.assertRaises(TypeError, islice, xrange(10))
 self.assertRaises(TypeError, islice, xrange(10), 1, 2, 3, 4)
 self.assertRaises(ValueError, islice, xrange(10), -5, 10, 1)
 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)
 def test_takewhile(self):
 data = [1, 3, 5, 20, 2, 4, 6, 8]
 underten = lambda x: x<10
 self.assertEqual(list(takewhile(underten, data)), [1, 3, 5])
 def test_dropwhile(self):
 data = [1, 3, 5, 20, 2, 4, 6, 8]
 underten = lambda x: x<10
 self.assertEqual(list(dropwhile(underten, data)), [20, 2, 4, 6, 8])
libreftest = """ Doctest for examples in the library reference, libitertools.tex
>>> for i in times(3):
... print "Hello"
...
Hello
Hello
Hello
>>> amounts = [120.15, 764.05, 823.14]
>>> for checknum, amount in izip(count(1200), amounts):
... print 'Check %d is for $%.2f' % (checknum, amount)
...
Check 1200 is for 120ドル.15
Check 1201 is for 764ドル.05
Check 1202 is for 823ドル.14
>>> import operator
>>> import operator
>>> for cube in imap(operator.pow, xrange(1,4), repeat(3)):
... print cube
...
1
8
27
>>> reportlines = ['EuroPython', 'Roster', '', 'alex', '', 'laura', '', 'martin', '', 'walter', '', 'samuele']
>>> for name in islice(reportlines, 3, len(reportlines), 2):
... print name.title()
...
Alex
Laura
Martin
Walter
Samuele
>>> def enumerate(iterable):
... return izip(count(), iterable)
>>> def tabulate(function):
... "Return function(0), function(1), ..."
... return imap(function, count())
>>> def iteritems(mapping):
... return izip(mapping.iterkeys(), mapping.itervalues())
>>> def nth(iterable, n):
... "Returns the nth item"
... return islice(iterable, n, n+1).next()
"""
__test__ = {'libreftest' : libreftest}
def test_main(verbose=None):
 import test_itertools
 suite = unittest.TestSuite()
 for testclass in (TestBasicOps,
 ):
 suite.addTest(unittest.makeSuite(testclass))
 test_support.run_suite(suite)
 test_support.run_doctest(test_itertools, verbose)
 # verify reference counting
 import sys
 if verbose and hasattr(sys, "gettotalrefcount"):
 counts = []
 for i in xrange(5):
 test_support.run_suite(suite)
 counts.append(sys.gettotalrefcount())
 print counts
if __name__ == "__main__":
 test_main(verbose=True)