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import unittest
from test import support
import operator
maxsize = support.MAX_Py_ssize_t
class newstyle:
def __index__(self):
return self.ind
class TrapInt(int):
def __index__(self):
return int(self)
class BaseTestCase(unittest.TestCase):
def setUp(self):
self.o = newstyle()
self.n = newstyle()
def test_basic(self):
self.o.ind = -2
self.n.ind = 2
self.assertEqual(operator.index(self.o), -2)
self.assertEqual(operator.index(self.n), 2)
def test_slice(self):
self.o.ind = 1
self.n.ind = 2
slc = slice(self.o, self.o, self.o)
check_slc = slice(1, 1, 1)
self.assertEqual(slc.indices(self.o), check_slc.indices(1))
slc = slice(self.n, self.n, self.n)
check_slc = slice(2, 2, 2)
self.assertEqual(slc.indices(self.n), check_slc.indices(2))
def test_wrappers(self):
self.o.ind = 4
self.n.ind = 5
self.assertEqual(6 .__index__(), 6)
self.assertEqual(-7 .__index__(), -7)
self.assertEqual(self.o.__index__(), 4)
self.assertEqual(self.n.__index__(), 5)
self.assertEqual(True.__index__(), 1)
self.assertEqual(False.__index__(), 0)
def test_subclasses(self):
r = list(range(10))
self.assertEqual(r[TrapInt(5):TrapInt(10)], r[5:10])
self.assertEqual(slice(TrapInt()).indices(0), (0,0,1))
def test_error(self):
self.o.ind = 'dumb'
self.n.ind = 'bad'
self.assertRaises(TypeError, operator.index, self.o)
self.assertRaises(TypeError, operator.index, self.n)
self.assertRaises(TypeError, slice(self.o).indices, 0)
self.assertRaises(TypeError, slice(self.n).indices, 0)
def test_int_subclass_with_index(self):
# __index__ should be used when computing indices, even for int
# subclasses. See issue #17576.
class MyInt(int):
def __index__(self):
return int(self) + 1
my_int = MyInt(7)
direct_index = my_int.__index__()
operator_index = operator.index(my_int)
self.assertEqual(direct_index, 8)
self.assertEqual(operator_index, 7)
# Both results should be of exact type int.
self.assertIs(type(direct_index), int)
#self.assertIs(type(operator_index), int)
def test_index_returns_int_subclass(self):
class BadInt:
def __index__(self):
return True
class BadInt2(int):
def __index__(self):
return True
bad_int = BadInt()
n = operator.index(bad_int)
self.assertEqual(n, 1)
bad_int = BadInt2()
n = operator.index(bad_int)
self.assertEqual(n, 0)
class SeqTestCase:
# This test case isn't run directly. It just defines common tests
# to the different sequence types below
def setUp(self):
self.o = newstyle()
self.n = newstyle()
self.o2 = newstyle()
self.n2 = newstyle()
def test_index(self):
self.o.ind = -2
self.n.ind = 2
self.assertEqual(self.seq[self.n], self.seq[2])
self.assertEqual(self.seq[self.o], self.seq[-2])
def test_slice(self):
self.o.ind = 1
self.o2.ind = 3
self.n.ind = 2
self.n2.ind = 4
self.assertEqual(self.seq[self.o:self.o2], self.seq[1:3])
self.assertEqual(self.seq[self.n:self.n2], self.seq[2:4])
def test_slice_bug7532(self):
seqlen = len(self.seq)
self.o.ind = int(seqlen * 1.5)
self.n.ind = seqlen + 2
self.assertEqual(self.seq[self.o:], self.seq[0:0])
self.assertEqual(self.seq[:self.o], self.seq)
self.assertEqual(self.seq[self.n:], self.seq[0:0])
self.assertEqual(self.seq[:self.n], self.seq)
self.o2.ind = -seqlen - 2
self.n2.ind = -int(seqlen * 1.5)
self.assertEqual(self.seq[self.o2:], self.seq)
self.assertEqual(self.seq[:self.o2], self.seq[0:0])
self.assertEqual(self.seq[self.n2:], self.seq)
self.assertEqual(self.seq[:self.n2], self.seq[0:0])
def test_repeat(self):
self.o.ind = 3
self.n.ind = 2
self.assertEqual(self.seq * self.o, self.seq * 3)
self.assertEqual(self.seq * self.n, self.seq * 2)
self.assertEqual(self.o * self.seq, self.seq * 3)
self.assertEqual(self.n * self.seq, self.seq * 2)
def test_wrappers(self):
self.o.ind = 4
self.n.ind = 5
self.assertEqual(self.seq.__getitem__(self.o), self.seq[4])
self.assertEqual(self.seq.__mul__(self.o), self.seq * 4)
self.assertEqual(self.seq.__rmul__(self.o), self.seq * 4)
self.assertEqual(self.seq.__getitem__(self.n), self.seq[5])
self.assertEqual(self.seq.__mul__(self.n), self.seq * 5)
self.assertEqual(self.seq.__rmul__(self.n), self.seq * 5)
def test_subclasses(self):
self.assertEqual(self.seq[TrapInt()], self.seq[0])
def test_error(self):
self.o.ind = 'dumb'
self.n.ind = 'bad'
indexobj = lambda x, obj: obj.seq[x]
self.assertRaises(TypeError, indexobj, self.o, self)
self.assertRaises(TypeError, indexobj, self.n, self)
sliceobj = lambda x, obj: obj.seq[x:]
self.assertRaises(TypeError, sliceobj, self.o, self)
self.assertRaises(TypeError, sliceobj, self.n, self)
class ListTestCase(SeqTestCase, unittest.TestCase):
seq = [0,10,20,30,40,50]
def test_setdelitem(self):
self.o.ind = -2
self.n.ind = 2
lst = list('ab!cdefghi!j')
del lst[self.o]
del lst[self.n]
lst[self.o] = 'X'
lst[self.n] = 'Y'
self.assertEqual(lst, list('abYdefghXj'))
lst = [5, 6, 7, 8, 9, 10, 11]
lst.__setitem__(self.n, "here")
self.assertEqual(lst, [5, 6, "here", 8, 9, 10, 11])
lst.__delitem__(self.n)
self.assertEqual(lst, [5, 6, 8, 9, 10, 11])
def test_inplace_repeat(self):
self.o.ind = 2
self.n.ind = 3
lst = [6, 4]
lst *= self.o
self.assertEqual(lst, [6, 4, 6, 4])
lst *= self.n
self.assertEqual(lst, [6, 4, 6, 4] * 3)
lst = [5, 6, 7, 8, 9, 11]
l2 = lst.__imul__(self.n)
self.assertIs(l2, lst)
self.assertEqual(lst, [5, 6, 7, 8, 9, 11] * 3)
class NewSeq:
def __init__(self, iterable):
self._list = list(iterable)
def __repr__(self):
return repr(self._list)
def __eq__(self, other):
return self._list == other
def __len__(self):
return len(self._list)
def __mul__(self, n):
return self.__class__(self._list*n)
__rmul__ = __mul__
def __getitem__(self, index):
return self._list[index]
class TupleTestCase(SeqTestCase, unittest.TestCase):
seq = (0,10,20,30,40,50)
class ByteArrayTestCase(SeqTestCase, unittest.TestCase):
seq = bytearray(b"this is a test")
class BytesTestCase(SeqTestCase, unittest.TestCase):
seq = b"this is a test"
class StringTestCase(SeqTestCase, unittest.TestCase):
seq = "this is a test"
class NewSeqTestCase(SeqTestCase, unittest.TestCase):
seq = NewSeq((0,10,20,30,40,50))
class RangeTestCase(unittest.TestCase):
def test_range(self):
n = newstyle()
n.ind = 5
self.assertEqual(range(1, 20)[n], 6)
self.assertEqual(range(1, 20).__getitem__(n), 6)
class OverflowTestCase(unittest.TestCase):
def setUp(self):
self.pos = 2**100
self.neg = -self.pos
def test_large_longs(self):
self.assertEqual(self.pos.__index__(), self.pos)
self.assertEqual(self.neg.__index__(), self.neg)
def test_getitem(self):
class GetItem:
def __len__(self):
assert False, "__len__ should not be invoked"
def __getitem__(self, key):
return key
x = GetItem()
self.assertEqual(x[self.pos], self.pos)
self.assertEqual(x[self.neg], self.neg)
self.assertEqual(x[self.neg:self.pos].indices(maxsize),
(0, maxsize, 1))
self.assertEqual(x[self.neg:self.pos:1].indices(maxsize),
(0, maxsize, 1))
def test_sequence_repeat(self):
self.assertRaises(OverflowError, lambda: "a" * self.pos)
self.assertRaises(OverflowError, lambda: "a" * self.neg)
if __name__ == "__main__":
unittest.main()
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