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import unittest
from test import test_support
import operator
from sys import maxint
class oldstyle:
def __index__(self):
return self.ind
class newstyle(object):
def __index__(self):
return self.ind
class TrapInt(int):
def __index__(self):
return self
class TrapLong(int):
def __index__(self):
return self
class BaseTestCase(unittest.TestCase):
def setUp(self):
self.o = oldstyle()
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)
def test_subclasses(self):
r = range(10)
self.assertEqual(r[TrapInt(5):TrapInt(10)], r[5:10])
self.assertEqual(r[TrapLong(5):TrapLong(10)], r[5:10])
self.assertEqual(slice(TrapInt()).indices(0), (0,0,1))
self.assertEqual(slice(TrapLong(0)).indices(0), (0,0,1))
def test_error(self):
self.o.ind = 'dumb'
self.n.ind = 'bad'
self.failUnlessRaises(TypeError, operator.index, self.o)
self.failUnlessRaises(TypeError, operator.index, self.n)
self.failUnlessRaises(TypeError, slice(self.o).indices, 0)
self.failUnlessRaises(TypeError, slice(self.n).indices, 0)
class SeqTestCase(unittest.TestCase):
# This test case isn't run directly. It just defines common tests
# to the different sequence types below
def setUp(self):
self.o = oldstyle()
self.n = newstyle()
self.o2 = oldstyle()
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_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])
self.assertEqual(self.seq[TrapLong()], self.seq[0])
def test_error(self):
self.o.ind = 'dumb'
self.n.ind = 'bad'
indexobj = lambda x, obj: obj.seq[x]
self.failUnlessRaises(TypeError, indexobj, self.o, self)
self.failUnlessRaises(TypeError, indexobj, self.n, self)
sliceobj = lambda x, obj: obj.seq[x:]
self.failUnlessRaises(TypeError, sliceobj, self.o, self)
self.failUnlessRaises(TypeError, sliceobj, self.n, self)
class ListTestCase(SeqTestCase):
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.assert_(l2 is lst)
self.assertEqual(lst, [5, 6, 7, 8, 9, 11] * 3)
class TupleTestCase(SeqTestCase):
seq = (0,10,20,30,40,50)
class StringTestCase(SeqTestCase):
seq = "this is a test"
class UnicodeTestCase(SeqTestCase):
seq = "this is a test"
class XRangeTestCase(unittest.TestCase):
def test_xrange(self):
n = newstyle()
n.ind = 5
self.assertEqual(xrange(1, 20)[n], 6)
self.assertEqual(xrange(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 _getitem_helper(self, base):
class GetItem(base):
def __len__(self):
return maxint
def __getitem__(self, key):
return key
def __getslice__(self, i, j):
return i, j
x = GetItem()
self.assertEqual(x[self.pos], self.pos)
self.assertEqual(x[self.neg], self.neg)
self.assertEqual(x[self.neg:self.pos], (-1, maxint))
self.assertEqual(x[self.neg:self.pos:1].indices(maxint), (0, maxint, 1))
def test_getitem(self):
self._getitem_helper(object)
def test_getitem_classic(self):
class Empty: pass
self._getitem_helper(Empty)
def test_sequence_repeat(self):
self.failUnlessRaises(OverflowError, lambda: "a" * self.pos)
self.failUnlessRaises(OverflowError, lambda: "a" * self.neg)
def test_main():
test_support.run_unittest(
BaseTestCase,
ListTestCase,
TupleTestCase,
StringTestCase,
UnicodeTestCase,
XRangeTestCase,
OverflowTestCase,
)
if __name__ == "__main__":
test_main()
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