111 lines
3.1 KiB
Python
111 lines
3.1 KiB
Python
# tests for slice objects; in particular the indices method.
|
|
|
|
import unittest
|
|
from test import test_support
|
|
|
|
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.assertRaises(Exc, cmp, s1, s2)
|
|
self.assertEqual(s1, s1)
|
|
|
|
s1 = slice(1, BadCmp())
|
|
s2 = slice(1, BadCmp())
|
|
self.assertEqual(s1, s1)
|
|
self.assertRaises(Exc, cmp, s1, s2)
|
|
|
|
s1 = slice(1, 2, BadCmp())
|
|
s2 = slice(1, 2, BadCmp())
|
|
self.assertEqual(s1, s1)
|
|
self.assertRaises(Exc, cmp, 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(-100L, 100L, 2L).indices(10), (0, 10, 2))
|
|
|
|
self.assertEqual(range(10)[::sys.maxint - 1], [0])
|
|
|
|
self.assertRaises(OverflowError, slice(None).indices, 1L<<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_main():
|
|
test_support.run_unittest(SliceTest)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|