cpython/Lib/test/test_slice.py
Guido van Rossum 805365ee39 Merged revisions 55007-55179 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/p3yk

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  r55077 | guido.van.rossum | 2007-05-02 11:54:37 -0700 (Wed, 02 May 2007) | 2 lines

  Use the new print syntax, at least.
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  r55142 | fred.drake | 2007-05-04 21:27:30 -0700 (Fri, 04 May 2007) | 1 line

  remove old cruftiness
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  r55143 | fred.drake | 2007-05-04 21:52:16 -0700 (Fri, 04 May 2007) | 1 line

  make this work with the new Python
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  r55162 | neal.norwitz | 2007-05-06 22:29:18 -0700 (Sun, 06 May 2007) | 1 line

  Get asdl code gen working with Python 2.3.  Should continue to work with 3.0
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  r55164 | neal.norwitz | 2007-05-07 00:00:38 -0700 (Mon, 07 May 2007) | 1 line

  Verify checkins to p3yk (sic) branch go to 3000 list.
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  r55166 | neal.norwitz | 2007-05-07 00:12:35 -0700 (Mon, 07 May 2007) | 1 line

  Fix this test so it runs again by importing warnings_test properly.
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  r55167 | neal.norwitz | 2007-05-07 01:03:22 -0700 (Mon, 07 May 2007) | 8 lines

  So long xrange.  range() now supports values that are outside
  -sys.maxint to sys.maxint.  floats raise a TypeError.

  This has been sitting for a long time.  It probably has some problems and
  needs cleanup.  Objects/rangeobject.c now uses 4-space indents since
  it is almost completely new.
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  r55171 | guido.van.rossum | 2007-05-07 10:21:26 -0700 (Mon, 07 May 2007) | 4 lines

  Fix two tests that were previously depending on significant spaces
  at the end of a line (and before that on Python 2.x print behavior
  that has no exact equivalent in 3.0).
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2007-05-07 22:24:25 +00:00

118 lines
3.4 KiB
Python

# tests for slice objects; in particular the indices method.
import unittest
from test import test_support
from cPickle import loads, dumps
import sys
class SliceTest(unittest.TestCase):
def test_constructor(self):
self.assertRaises(TypeError, slice)
self.assertRaises(TypeError, slice, 1, 2, 3, 4)
def test_repr(self):
self.assertEqual(repr(slice(1, 2, 3)), "slice(1, 2, 3)")
def test_hash(self):
# Verify clearing of SF bug #800796
self.assertRaises(TypeError, hash, slice(5))
self.assertRaises(TypeError, slice(5).__hash__)
def test_cmp(self):
s1 = slice(1, 2, 3)
s2 = slice(1, 2, 3)
s3 = slice(1, 2, 4)
self.assertEqual(s1, s2)
self.assertNotEqual(s1, s3)
class Exc(Exception):
pass
class BadCmp(object):
def __eq__(self, other):
raise Exc
s1 = slice(BadCmp())
s2 = slice(BadCmp())
self.assertEqual(s1, s1)
self.assertRaises(Exc, lambda: s1 == s2)
s1 = slice(1, BadCmp())
s2 = slice(1, BadCmp())
self.assertEqual(s1, s1)
self.assertRaises(Exc, lambda: s1 == s2)
s1 = slice(1, 2, BadCmp())
s2 = slice(1, 2, BadCmp())
self.assertEqual(s1, s1)
self.assertRaises(Exc, lambda: s1 == s2)
def test_members(self):
s = slice(1)
self.assertEqual(s.start, None)
self.assertEqual(s.stop, 1)
self.assertEqual(s.step, None)
s = slice(1, 2)
self.assertEqual(s.start, 1)
self.assertEqual(s.stop, 2)
self.assertEqual(s.step, None)
s = slice(1, 2, 3)
self.assertEqual(s.start, 1)
self.assertEqual(s.stop, 2)
self.assertEqual(s.step, 3)
class AnyClass:
pass
obj = AnyClass()
s = slice(obj)
self.assert_(s.stop is obj)
def test_indices(self):
self.assertEqual(slice(None ).indices(10), (0, 10, 1))
self.assertEqual(slice(None, None, 2).indices(10), (0, 10, 2))
self.assertEqual(slice(1, None, 2).indices(10), (1, 10, 2))
self.assertEqual(slice(None, None, -1).indices(10), (9, -1, -1))
self.assertEqual(slice(None, None, -2).indices(10), (9, -1, -2))
self.assertEqual(slice(3, None, -2).indices(10), (3, -1, -2))
self.assertEqual(
slice(-100, 100 ).indices(10),
slice(None).indices(10)
)
self.assertEqual(
slice(100, -100, -1).indices(10),
slice(None, None, -1).indices(10)
)
self.assertEqual(slice(-100, 100, 2).indices(10), (0, 10, 2))
self.assertEqual(list(range(10))[::sys.maxint - 1], [0])
self.assertRaises(OverflowError, slice(None).indices, 1<<100)
def test_setslice_without_getslice(self):
tmp = []
class X(object):
def __setslice__(self, i, j, k):
tmp.append((i, j, k))
x = X()
x[1:2] = 42
self.assertEquals(tmp, [(1, 2, 42)])
def test_pickle(self):
s = slice(10, 20, 3)
for protocol in (0,1,2):
t = loads(dumps(s, protocol))
self.assertEqual(s, t)
self.assertEqual(s.indices(15), t.indices(15))
self.assertNotEqual(id(s), id(t))
def test_main():
test_support.run_unittest(SliceTest)
if __name__ == "__main__":
test_main()