/usr/lib/python2.7/test/test_slice.py is in libpython2.7-testsuite 2.7.6-8ubuntu0.5.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 | # 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
__hash__ = None # Silence Py3k warning
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.assertTrue(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))
# issue 3004 tests
self.assertEqual(slice(None, -9).indices(10), (0, 1, 1))
self.assertEqual(slice(None, -10).indices(10), (0, 0, 1))
self.assertEqual(slice(None, -11).indices(10), (0, 0, 1))
self.assertEqual(slice(None, -10, -1).indices(10), (9, 0, -1))
self.assertEqual(slice(None, -11, -1).indices(10), (9, -1, -1))
self.assertEqual(slice(None, -12, -1).indices(10), (9, -1, -1))
self.assertEqual(slice(None, 9).indices(10), (0, 9, 1))
self.assertEqual(slice(None, 10).indices(10), (0, 10, 1))
self.assertEqual(slice(None, 11).indices(10), (0, 10, 1))
self.assertEqual(slice(None, 8, -1).indices(10), (9, 8, -1))
self.assertEqual(slice(None, 9, -1).indices(10), (9, 9, -1))
self.assertEqual(slice(None, 10, -1).indices(10), (9, 9, -1))
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()
with test_support.check_py3k_warnings():
x[1:2] = 42
self.assertEqual(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()
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