test_index.py 9.72 KB
Newer Older
1 2 3
import unittest
from test import test_support
import operator
4
from sys import maxint
5 6
maxsize = test_support.MAX_Py_ssize_t
minsize = -maxsize-1
7 8 9 10 11 12 13 14 15

class oldstyle:
    def __index__(self):
        return self.ind

class newstyle(object):
    def __index__(self):
        return self.ind

16 17 18 19 20 21 22 23
class TrapInt(int):
    def __index__(self):
        return self

class TrapLong(long):
    def __index__(self):
        return self

24
class BaseTestCase(unittest.TestCase):
25 26 27
    def setUp(self):
        self.o = oldstyle()
        self.n = newstyle()
28

29 30 31
    def test_basic(self):
        self.o.ind = -2
        self.n.ind = 2
32 33
        self.assertEqual(operator.index(self.o), -2)
        self.assertEqual(operator.index(self.n), 2)
Tim Peters's avatar
Tim Peters committed
34

35 36 37 38 39 40 41 42 43
    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))
44

45 46 47 48 49 50 51
    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)
52 53
        self.assertEqual(True.__index__(), 1)
        self.assertEqual(False.__index__(), 0)
54

55 56 57 58 59 60
    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))
Tim Peters's avatar
Tim Peters committed
61

62 63 64
    def test_error(self):
        self.o.ind = 'dumb'
        self.n.ind = 'bad'
65 66 67 68
        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)
69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84


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])
85 86 87 88 89 90

    def test_slice(self):
        self.o.ind = 1
        self.o2.ind = 3
        self.n.ind = 2
        self.n2.ind = 4
91 92
        self.assertEqual(self.seq[self.o:self.o2], self.seq[1:3])
        self.assertEqual(self.seq[self.n:self.n2], self.seq[2:4])
93

94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
    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)
        if isinstance(self.seq, ClassicSeq):
            return
        # These tests fail for ClassicSeq (see bug #7532)
        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])

112 113 114
    def test_repeat(self):
        self.o.ind = 3
        self.n.ind = 2
115 116 117 118
        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)
119 120

    def test_wrappers(self):
121 122 123 124 125 126 127 128 129
        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)

130 131 132
    def test_subclasses(self):
        self.assertEqual(self.seq[TrapInt()], self.seq[0])
        self.assertEqual(self.seq[TrapLong()], self.seq[0])
133 134 135 136 137

    def test_error(self):
        self.o.ind = 'dumb'
        self.n.ind = 'bad'
        indexobj = lambda x, obj: obj.seq[x]
138 139
        self.assertRaises(TypeError, indexobj, self.o, self)
        self.assertRaises(TypeError, indexobj, self.n, self)
140
        sliceobj = lambda x, obj: obj.seq[x:]
141 142
        self.assertRaises(TypeError, sliceobj, self.o, self)
        self.assertRaises(TypeError, sliceobj, self.n, self)
143 144 145


class ListTestCase(SeqTestCase):
146 147 148
    seq = [0,10,20,30,40,50]

    def test_setdelitem(self):
149 150
        self.o.ind = -2
        self.n.ind = 2
151 152 153 154 155
        lst = list('ab!cdefghi!j')
        del lst[self.o]
        del lst[self.n]
        lst[self.o] = 'X'
        lst[self.n] = 'Y'
156
        self.assertEqual(lst, list('abYdefghXj'))
157

158 159
        lst = [5, 6, 7, 8, 9, 10, 11]
        lst.__setitem__(self.n, "here")
160
        self.assertEqual(lst, [5, 6, "here", 8, 9, 10, 11])
161
        lst.__delitem__(self.n)
162
        self.assertEqual(lst, [5, 6, 8, 9, 10, 11])
163

164 165 166 167 168
    def test_inplace_repeat(self):
        self.o.ind = 2
        self.n.ind = 3
        lst = [6, 4]
        lst *= self.o
169
        self.assertEqual(lst, [6, 4, 6, 4])
170
        lst *= self.n
171
        self.assertEqual(lst, [6, 4, 6, 4] * 3)
172

173 174
        lst = [5, 6, 7, 8, 9, 11]
        l2 = lst.__imul__(self.n)
175
        self.assertIs(l2, lst)
176
        self.assertEqual(lst, [5, 6, 7, 8, 9, 11] * 3)
177 178


179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212
class _BaseSeq:

    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 _GetSliceMixin:

    def __getslice__(self, i, j):
        return self._list.__getslice__(i, j)


class ClassicSeq(_BaseSeq): pass
class NewSeq(_BaseSeq, object): pass
class ClassicSeqDeprecated(_GetSliceMixin, ClassicSeq): pass
class NewSeqDeprecated(_GetSliceMixin, NewSeq): pass


213
class TupleTestCase(SeqTestCase):
214
    seq = (0,10,20,30,40,50)
215

216
class StringTestCase(SeqTestCase):
217
    seq = "this is a test"
218

219 220 221
class ByteArrayTestCase(SeqTestCase):
    seq = bytearray("this is a test")

222
class UnicodeTestCase(SeqTestCase):
223
    seq = u"this is a test"
224

225 226 227 228 229 230 231 232 233 234 235 236
class ClassicSeqTestCase(SeqTestCase):
    seq = ClassicSeq((0,10,20,30,40,50))

class NewSeqTestCase(SeqTestCase):
    seq = NewSeq((0,10,20,30,40,50))

class ClassicSeqDeprecatedTestCase(SeqTestCase):
    seq = ClassicSeqDeprecated((0,10,20,30,40,50))

class NewSeqDeprecatedTestCase(SeqTestCase):
    seq = NewSeqDeprecated((0,10,20,30,40,50))

237

238
class XRangeTestCase(unittest.TestCase):
239

240 241 242
    def test_xrange(self):
        n = newstyle()
        n.ind = 5
243 244 245 246 247 248 249 250 251 252 253 254 255
        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)

256
    def _getitem_helper(self, base):
257 258 259 260 261 262 263 264 265 266 267 268 269 270
        class GetItem(base):
            def __len__(self):
                return maxint # cannot return long here
            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 _getslice_helper_deprecated(self, base):
271
        class GetItem(base):
272
            def __len__(self):
273
                return maxint # cannot return long here
274 275 276 277 278 279 280
            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)
281
        self.assertEqual(x[self.neg:self.pos], (maxint+minsize, maxsize))
282 283
        self.assertEqual(x[self.neg:self.pos:1].indices(maxsize),
                         (0, maxsize, 1))
284

285 286
    def test_getitem(self):
        self._getitem_helper(object)
287
        with test_support.check_py3k_warnings():
288
            self._getslice_helper_deprecated(object)
289 290 291

    def test_getitem_classic(self):
        class Empty: pass
292 293
        # XXX This test fails (see bug #7532)
        #self._getitem_helper(Empty)
294
        with test_support.check_py3k_warnings():
295
            self._getslice_helper_deprecated(Empty)
296

297
    def test_sequence_repeat(self):
298 299
        self.assertRaises(OverflowError, lambda: "a" * self.pos)
        self.assertRaises(OverflowError, lambda: "a" * self.neg)
300 301 302 303


def test_main():
    test_support.run_unittest(
304
        BaseTestCase,
305 306
        ListTestCase,
        TupleTestCase,
307
        ByteArrayTestCase,
308
        StringTestCase,
309
        UnicodeTestCase,
310 311
        ClassicSeqTestCase,
        NewSeqTestCase,
312
        XRangeTestCase,
313
        OverflowTestCase,
314
    )
315
    with test_support.check_py3k_warnings():
316 317 318 319 320
        test_support.run_unittest(
            ClassicSeqDeprecatedTestCase,
            NewSeqDeprecatedTestCase,
        )

321 322 323

if __name__ == "__main__":
    test_main()