source: vendor/python/2.5/Lib/test/seq_tests.py@ 3225

Last change on this file since 3225 was 3225, checked in by bird, 19 years ago

Python 2.5
File size: 11.1 KB
Line 
1"""
2Tests common to tuple, list and UserList.UserList
3"""
4
5import unittest
6from test import test_support
7
8# Various iterables
9# This is used for checking the constructor (here and in test_deque.py)
10def iterfunc(seqn):
11 'Regular generator'
12 for i in seqn:
13 yield i
14
15class Sequence:
16 'Sequence using __getitem__'
17 def __init__(self, seqn):
18 self.seqn = seqn
19 def __getitem__(self, i):
20 return self.seqn[i]
21
22class IterFunc:
23 'Sequence using iterator protocol'
24 def __init__(self, seqn):
25 self.seqn = seqn
26 self.i = 0
27 def __iter__(self):
28 return self
29 def next(self):
30 if self.i >= len(self.seqn): raise StopIteration
31 v = self.seqn[self.i]
32 self.i += 1
33 return v
34
35class IterGen:
36 'Sequence using iterator protocol defined with a generator'
37 def __init__(self, seqn):
38 self.seqn = seqn
39 self.i = 0
40 def __iter__(self):
41 for val in self.seqn:
42 yield val
43
44class IterNextOnly:
45 'Missing __getitem__ and __iter__'
46 def __init__(self, seqn):
47 self.seqn = seqn
48 self.i = 0
49 def next(self):
50 if self.i >= len(self.seqn): raise StopIteration
51 v = self.seqn[self.i]
52 self.i += 1
53 return v
54
55class IterNoNext:
56 'Iterator missing next()'
57 def __init__(self, seqn):
58 self.seqn = seqn
59 self.i = 0
60 def __iter__(self):
61 return self
62
63class IterGenExc:
64 'Test propagation of exceptions'
65 def __init__(self, seqn):
66 self.seqn = seqn
67 self.i = 0
68 def __iter__(self):
69 return self
70 def next(self):
71 3 // 0
72
73class IterFuncStop:
74 'Test immediate stop'
75 def __init__(self, seqn):
76 pass
77 def __iter__(self):
78 return self
79 def next(self):
80 raise StopIteration
81
82from itertools import chain, imap
83def itermulti(seqn):
84 'Test multiple tiers of iterators'
85 return chain(imap(lambda x:x, iterfunc(IterGen(Sequence(seqn)))))
86
87class CommonTest(unittest.TestCase):
88 # The type to be tested
89 type2test = None
90
91 def test_constructors(self):
92 l0 = []
93 l1 = [0]
94 l2 = [0, 1]
95
96 u = self.type2test()
97 u0 = self.type2test(l0)
98 u1 = self.type2test(l1)
99 u2 = self.type2test(l2)
100
101 uu = self.type2test(u)
102 uu0 = self.type2test(u0)
103 uu1 = self.type2test(u1)
104 uu2 = self.type2test(u2)
105
106 v = self.type2test(tuple(u))
107 class OtherSeq:
108 def __init__(self, initseq):
109 self.__data = initseq
110 def __len__(self):
111 return len(self.__data)
112 def __getitem__(self, i):
113 return self.__data[i]
114 s = OtherSeq(u0)
115 v0 = self.type2test(s)
116 self.assertEqual(len(v0), len(s))
117
118 s = "this is also a sequence"
119 vv = self.type2test(s)
120 self.assertEqual(len(vv), len(s))
121
122 # Create from various iteratables
123 for s in ("123", "", range(1000), ('do', 1.2), xrange(2000,2200,5)):
124 for g in (Sequence, IterFunc, IterGen,
125 itermulti, iterfunc):
126 self.assertEqual(self.type2test(g(s)), self.type2test(s))
127 self.assertEqual(self.type2test(IterFuncStop(s)), self.type2test())
128 self.assertEqual(self.type2test(c for c in "123"), self.type2test("123"))
129 self.assertRaises(TypeError, self.type2test, IterNextOnly(s))
130 self.assertRaises(TypeError, self.type2test, IterNoNext(s))
131 self.assertRaises(ZeroDivisionError, self.type2test, IterGenExc(s))
132
133 def test_truth(self):
134 self.assert_(not self.type2test())
135 self.assert_(self.type2test([42]))
136
137 def test_getitem(self):
138 u = self.type2test([0, 1, 2, 3, 4])
139 for i in xrange(len(u)):
140 self.assertEqual(u[i], i)
141 self.assertEqual(u[long(i)], i)
142 for i in xrange(-len(u), -1):
143 self.assertEqual(u[i], len(u)+i)
144 self.assertEqual(u[long(i)], len(u)+i)
145 self.assertRaises(IndexError, u.__getitem__, -len(u)-1)
146 self.assertRaises(IndexError, u.__getitem__, len(u))
147 self.assertRaises(ValueError, u.__getitem__, slice(0,10,0))
148
149 u = self.type2test()
150 self.assertRaises(IndexError, u.__getitem__, 0)
151 self.assertRaises(IndexError, u.__getitem__, -1)
152
153 self.assertRaises(TypeError, u.__getitem__)
154
155 a = self.type2test([10, 11])
156 self.assertEqual(a[0], 10)
157 self.assertEqual(a[1], 11)
158 self.assertEqual(a[-2], 10)
159 self.assertEqual(a[-1], 11)
160 self.assertRaises(IndexError, a.__getitem__, -3)
161 self.assertRaises(IndexError, a.__getitem__, 3)
162
163 def test_getslice(self):
164 l = [0, 1, 2, 3, 4]
165 u = self.type2test(l)
166
167 self.assertEqual(u[0:0], self.type2test())
168 self.assertEqual(u[1:2], self.type2test([1]))
169 self.assertEqual(u[-2:-1], self.type2test([3]))
170 self.assertEqual(u[-1000:1000], u)
171 self.assertEqual(u[1000:-1000], self.type2test([]))
172 self.assertEqual(u[:], u)
173 self.assertEqual(u[1:None], self.type2test([1, 2, 3, 4]))
174 self.assertEqual(u[None:3], self.type2test([0, 1, 2]))
175
176 # Extended slices
177 self.assertEqual(u[::], u)
178 self.assertEqual(u[::2], self.type2test([0, 2, 4]))
179 self.assertEqual(u[1::2], self.type2test([1, 3]))
180 self.assertEqual(u[::-1], self.type2test([4, 3, 2, 1, 0]))
181 self.assertEqual(u[::-2], self.type2test([4, 2, 0]))
182 self.assertEqual(u[3::-2], self.type2test([3, 1]))
183 self.assertEqual(u[3:3:-2], self.type2test([]))
184 self.assertEqual(u[3:2:-2], self.type2test([3]))
185 self.assertEqual(u[3:1:-2], self.type2test([3]))
186 self.assertEqual(u[3:0:-2], self.type2test([3, 1]))
187 self.assertEqual(u[::-100], self.type2test([4]))
188 self.assertEqual(u[100:-100:], self.type2test([]))
189 self.assertEqual(u[-100:100:], u)
190 self.assertEqual(u[100:-100:-1], u[::-1])
191 self.assertEqual(u[-100:100:-1], self.type2test([]))
192 self.assertEqual(u[-100L:100L:2L], self.type2test([0, 2, 4]))
193
194 # Test extreme cases with long ints
195 a = self.type2test([0,1,2,3,4])
196 self.assertEqual(a[ -pow(2,128L): 3 ], self.type2test([0,1,2]))
197 self.assertEqual(a[ 3: pow(2,145L) ], self.type2test([3,4]))
198
199 self.assertRaises(TypeError, u.__getslice__)
200
201 def test_contains(self):
202 u = self.type2test([0, 1, 2])
203 for i in u:
204 self.assert_(i in u)
205 for i in min(u)-1, max(u)+1:
206 self.assert_(i not in u)
207
208 self.assertRaises(TypeError, u.__contains__)
209
210 def test_contains_fake(self):
211 class AllEq:
212 # Sequences must use rich comparison against each item
213 # (unless "is" is true, or an earlier item answered)
214 # So instances of AllEq must be found in all non-empty sequences.
215 def __eq__(self, other):
216 return True
217 def __hash__(self):
218 raise NotImplemented
219 self.assert_(AllEq() not in self.type2test([]))
220 self.assert_(AllEq() in self.type2test([1]))
221
222 def test_contains_order(self):
223 # Sequences must test in-order. If a rich comparison has side
224 # effects, these will be visible to tests against later members.
225 # In this test, the "side effect" is a short-circuiting raise.
226 class DoNotTestEq(Exception):
227 pass
228 class StopCompares:
229 def __eq__(self, other):
230 raise DoNotTestEq
231
232 checkfirst = self.type2test([1, StopCompares()])
233 self.assert_(1 in checkfirst)
234 checklast = self.type2test([StopCompares(), 1])
235 self.assertRaises(DoNotTestEq, checklast.__contains__, 1)
236
237 def test_len(self):
238 self.assertEqual(len(self.type2test()), 0)
239 self.assertEqual(len(self.type2test([])), 0)
240 self.assertEqual(len(self.type2test([0])), 1)
241 self.assertEqual(len(self.type2test([0, 1, 2])), 3)
242
243 def test_minmax(self):
244 u = self.type2test([0, 1, 2])
245 self.assertEqual(min(u), 0)
246 self.assertEqual(max(u), 2)
247
248 def test_addmul(self):
249 u1 = self.type2test([0])
250 u2 = self.type2test([0, 1])
251 self.assertEqual(u1, u1 + self.type2test())
252 self.assertEqual(u1, self.type2test() + u1)
253 self.assertEqual(u1 + self.type2test([1]), u2)
254 self.assertEqual(self.type2test([-1]) + u1, self.type2test([-1, 0]))
255 self.assertEqual(self.type2test(), u2*0)
256 self.assertEqual(self.type2test(), 0*u2)
257 self.assertEqual(self.type2test(), u2*0L)
258 self.assertEqual(self.type2test(), 0L*u2)
259 self.assertEqual(u2, u2*1)
260 self.assertEqual(u2, 1*u2)
261 self.assertEqual(u2, u2*1L)
262 self.assertEqual(u2, 1L*u2)
263 self.assertEqual(u2+u2, u2*2)
264 self.assertEqual(u2+u2, 2*u2)
265 self.assertEqual(u2+u2, u2*2L)
266 self.assertEqual(u2+u2, 2L*u2)
267 self.assertEqual(u2+u2+u2, u2*3)
268 self.assertEqual(u2+u2+u2, 3*u2)
269
270 class subclass(self.type2test):
271 pass
272 u3 = subclass([0, 1])
273 self.assertEqual(u3, u3*1)
274 self.assert_(u3 is not u3*1)
275
276 def test_iadd(self):
277 u = self.type2test([0, 1])
278 u += self.type2test()
279 self.assertEqual(u, self.type2test([0, 1]))
280 u += self.type2test([2, 3])
281 self.assertEqual(u, self.type2test([0, 1, 2, 3]))
282 u += self.type2test([4, 5])
283 self.assertEqual(u, self.type2test([0, 1, 2, 3, 4, 5]))
284
285 u = self.type2test("spam")
286 u += self.type2test("eggs")
287 self.assertEqual(u, self.type2test("spameggs"))
288
289 def test_imul(self):
290 u = self.type2test([0, 1])
291 u *= 3
292 self.assertEqual(u, self.type2test([0, 1, 0, 1, 0, 1]))
293
294 def test_getitemoverwriteiter(self):
295 # Verify that __getitem__ overrides are not recognized by __iter__
296 class T(self.type2test):
297 def __getitem__(self, key):
298 return str(key) + '!!!'
299 self.assertEqual(iter(T((1,2))).next(), 1)
300
301 def test_repeat(self):
302 for m in xrange(4):
303 s = tuple(range(m))
304 for n in xrange(-3, 5):
305 self.assertEqual(self.type2test(s*n), self.type2test(s)*n)
306 self.assertEqual(self.type2test(s)*(-4), self.type2test([]))
307 self.assertEqual(id(s), id(s*1))
308
309 def test_subscript(self):
310 a = self.type2test([10, 11])
311 self.assertEqual(a.__getitem__(0L), 10)
312 self.assertEqual(a.__getitem__(1L), 11)
313 self.assertEqual(a.__getitem__(-2L), 10)
314 self.assertEqual(a.__getitem__(-1L), 11)
315 self.assertRaises(IndexError, a.__getitem__, -3)
316 self.assertRaises(IndexError, a.__getitem__, 3)
317 self.assertEqual(a.__getitem__(slice(0,1)), self.type2test([10]))
318 self.assertEqual(a.__getitem__(slice(1,2)), self.type2test([11]))
319 self.assertEqual(a.__getitem__(slice(0,2)), self.type2test([10, 11]))
320 self.assertEqual(a.__getitem__(slice(0,3)), self.type2test([10, 11]))
321 self.assertEqual(a.__getitem__(slice(3,5)), self.type2test([]))
322 self.assertRaises(ValueError, a.__getitem__, slice(0, 10, 0))
323 self.assertRaises(TypeError, a.__getitem__, 'x')
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