summaryrefslogtreecommitdiffstats
path: root/Lib/test/test_index.py
blob: ae905c2663cff39bb439db880156071820dd7254 (plain)
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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
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
import unittest
from test import support
import operator
maxsize = support.MAX_Py_ssize_t
minsize = -maxsize-1

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 = list(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.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)


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.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):
    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.assertTrue(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 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(object):
            def __len__(self):
                return sys.maxsize
            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))

    def test_sequence_repeat(self):
        self.assertRaises(OverflowError, lambda: "a" * self.pos)
        self.assertRaises(OverflowError, lambda: "a" * self.neg)


def test_main():
    support.run_unittest(
        BaseTestCase,
        ListTestCase,
        TupleTestCase,
        StringTestCase,
        UnicodeTestCase,
        OverflowTestCase,
    )

if __name__ == "__main__":
    test_main()