diff options
Diffstat (limited to 'Lib/test/test_index.py')
| -rw-r--r-- | Lib/test/test_index.py | 182 |
1 files changed, 134 insertions, 48 deletions
diff --git a/Lib/test/test_index.py b/Lib/test/test_index.py index 45b3b2b..ecb566d 100644 --- a/Lib/test/test_index.py +++ b/Lib/test/test_index.py @@ -1,6 +1,7 @@ import unittest from test import test_support import operator +from sys import maxint class oldstyle: def __index__(self): @@ -10,68 +11,116 @@ class newstyle(object): def __index__(self): return self.ind +class TrapInt(int): + def __index__(self): + return self + +class TrapLong(long): + def __index__(self): + return self + class BaseTestCase(unittest.TestCase): def setUp(self): self.o = oldstyle() self.n = newstyle() - self.o2 = oldstyle() - self.n2 = newstyle() def test_basic(self): self.o.ind = -2 self.n.ind = 2 - assert(self.seq[self.n] == self.seq[2]) - assert(self.seq[self.o] == self.seq[-2]) - assert(operator.index(self.o) == -2) - assert(operator.index(self.n) == 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(-7L.__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' - myfunc = lambda x, obj: obj.seq[x] self.failUnlessRaises(TypeError, operator.index, self.o) self.failUnlessRaises(TypeError, operator.index, self.n) - self.failUnlessRaises(TypeError, myfunc, self.o, self) - self.failUnlessRaises(TypeError, myfunc, self.n, self) + 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 - assert(self.seq[self.o:self.o2] == self.seq[1:3]) - assert(self.seq[self.n:self.n2] == self.seq[2:4]) + 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 - assert(self.seq * self.o == self.seq * 3) - assert(self.seq * self.n == self.seq * 2) - assert(self.o * self.seq == self.seq * 3) - assert(self.n * self.seq == self.seq * 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): - n = self.n - n.ind = 5 - assert n.__index__() == 5 - assert 6 .__index__() == 6 - assert -7L.__index__() == -7 - assert self.seq.__getitem__(n) == self.seq[5] - assert self.seq.__mul__(n) == self.seq * 5 - assert self.seq.__rmul__(n) == self.seq * 5 - - def test_infinite_recusion(self): - class Trap1(int): - def __index__(self): - return self - class Trap2(long): - def __index__(self): - return self - self.failUnlessRaises(TypeError, operator.getitem, self.seq, Trap1()) - self.failUnlessRaises(TypeError, operator.getitem, self.seq, Trap2()) - - -class ListTestCase(BaseTestCase): + 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): @@ -82,36 +131,36 @@ class ListTestCase(BaseTestCase): del lst[self.n] lst[self.o] = 'X' lst[self.n] = 'Y' - assert lst == list('abYdefghXj') + self.assertEqual(lst, list('abYdefghXj')) lst = [5, 6, 7, 8, 9, 10, 11] lst.__setitem__(self.n, "here") - assert lst == [5, 6, "here", 8, 9, 10, 11] + self.assertEqual(lst, [5, 6, "here", 8, 9, 10, 11]) lst.__delitem__(self.n) - assert lst == [5, 6, 8, 9, 10, 11] + 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 - assert lst == [6, 4, 6, 4] + self.assertEqual(lst, [6, 4, 6, 4]) lst *= self.n - assert lst == [6, 4, 6, 4] * 3 + self.assertEqual(lst, [6, 4, 6, 4] * 3) lst = [5, 6, 7, 8, 9, 11] l2 = lst.__imul__(self.n) - assert l2 is lst - assert lst == [5, 6, 7, 8, 9, 11] * 3 + self.assert_(l2 is lst) + self.assertEqual(lst, [5, 6, 7, 8, 9, 11] * 3) -class TupleTestCase(BaseTestCase): +class TupleTestCase(SeqTestCase): seq = (0,10,20,30,40,50) -class StringTestCase(BaseTestCase): +class StringTestCase(SeqTestCase): seq = "this is a test" -class UnicodeTestCase(BaseTestCase): +class UnicodeTestCase(SeqTestCase): seq = u"this is a test" @@ -120,17 +169,54 @@ class XRangeTestCase(unittest.TestCase): def test_xrange(self): n = newstyle() n.ind = 5 - assert xrange(1, 20)[n] == 6 - assert xrange(1, 20).__getitem__(n) == 6 + 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__": |