# tests for slice objects; in particular the indices method.
from test
import test_support
class SliceTest(unittest
.TestCase
):
def test_constructor(self
):
self
.assertRaises(TypeError, slice)
self
.assertRaises(TypeError, slice, 1, 2, 3, 4)
self
.assertEqual(repr(slice(1, 2, 3)), "slice(1, 2, 3)")
# Verify clearing of SF bug #800796
self
.assertRaises(TypeError, hash, slice(5))
self
.assertRaises(TypeError, slice(5).__hash
__)
self
.assertNotEqual(s1
, s3
)
self
.assertRaises(Exc
, cmp, s1
, s2
)
self
.assertRaises(Exc
, cmp, s1
, s2
)
s1
= slice(1, 2, BadCmp())
s2
= slice(1, 2, BadCmp())
self
.assertRaises(Exc
, cmp, s1
, s2
)
self
.assertEqual(s
.start
, None)
self
.assertEqual(s
.stop
, 1)
self
.assertEqual(s
.step
, None)
self
.assertEqual(s
.start
, 1)
self
.assertEqual(s
.stop
, 2)
self
.assertEqual(s
.step
, None)
self
.assertEqual(s
.start
, 1)
self
.assertEqual(s
.stop
, 2)
self
.assertEqual(s
.step
, 3)
self
.assert_(s
.stop
is obj
)
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))
slice(-100, 100 ).indices(10),
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)
test_support
.run_unittest(SliceTest
)
if __name__
== "__main__":