1 """
2 Tests common to tuple, list and UserList.UserList
3 """
4
5 import unittest
6 import sys
7 import pickle
8 from test import support
9 from test.support import ALWAYS_EQ, NEVER_EQ
10
11 # Various iterables
12 # This is used for checking the constructor (here and in test_deque.py)
13 def iterfunc(seqn):
14 'Regular generator'
15 for i in seqn:
16 yield i
17
18 class ESC[4;38;5;81mSequence:
19 'Sequence using __getitem__'
20 def __init__(self, seqn):
21 self.seqn = seqn
22 def __getitem__(self, i):
23 return self.seqn[i]
24
25 class ESC[4;38;5;81mIterFunc:
26 'Sequence using iterator protocol'
27 def __init__(self, seqn):
28 self.seqn = seqn
29 self.i = 0
30 def __iter__(self):
31 return self
32 def __next__(self):
33 if self.i >= len(self.seqn): raise StopIteration
34 v = self.seqn[self.i]
35 self.i += 1
36 return v
37
38 class ESC[4;38;5;81mIterGen:
39 'Sequence using iterator protocol defined with a generator'
40 def __init__(self, seqn):
41 self.seqn = seqn
42 self.i = 0
43 def __iter__(self):
44 for val in self.seqn:
45 yield val
46
47 class ESC[4;38;5;81mIterNextOnly:
48 'Missing __getitem__ and __iter__'
49 def __init__(self, seqn):
50 self.seqn = seqn
51 self.i = 0
52 def __next__(self):
53 if self.i >= len(self.seqn): raise StopIteration
54 v = self.seqn[self.i]
55 self.i += 1
56 return v
57
58 class ESC[4;38;5;81mIterNoNext:
59 'Iterator missing __next__()'
60 def __init__(self, seqn):
61 self.seqn = seqn
62 self.i = 0
63 def __iter__(self):
64 return self
65
66 class ESC[4;38;5;81mIterGenExc:
67 'Test propagation of exceptions'
68 def __init__(self, seqn):
69 self.seqn = seqn
70 self.i = 0
71 def __iter__(self):
72 return self
73 def __next__(self):
74 3 // 0
75
76 class ESC[4;38;5;81mIterFuncStop:
77 'Test immediate stop'
78 def __init__(self, seqn):
79 pass
80 def __iter__(self):
81 return self
82 def __next__(self):
83 raise StopIteration
84
85 from itertools import chain
86 def itermulti(seqn):
87 'Test multiple tiers of iterators'
88 return chain(map(lambda x:x, iterfunc(IterGen(Sequence(seqn)))))
89
90 class ESC[4;38;5;81mLyingTuple(ESC[4;38;5;149mtuple):
91 def __iter__(self):
92 yield 1
93
94 class ESC[4;38;5;81mLyingList(ESC[4;38;5;149mlist):
95 def __iter__(self):
96 yield 1
97
98 class ESC[4;38;5;81mCommonTest(ESC[4;38;5;149munittestESC[4;38;5;149m.ESC[4;38;5;149mTestCase):
99 # The type to be tested
100 type2test = None
101
102 def test_constructors(self):
103 l0 = []
104 l1 = [0]
105 l2 = [0, 1]
106
107 u = self.type2test()
108 u0 = self.type2test(l0)
109 u1 = self.type2test(l1)
110 u2 = self.type2test(l2)
111
112 uu = self.type2test(u)
113 uu0 = self.type2test(u0)
114 uu1 = self.type2test(u1)
115 uu2 = self.type2test(u2)
116
117 v = self.type2test(tuple(u))
118 class ESC[4;38;5;81mOtherSeq:
119 def __init__(self, initseq):
120 self.__data = initseq
121 def __len__(self):
122 return len(self.__data)
123 def __getitem__(self, i):
124 return self.__data[i]
125 s = OtherSeq(u0)
126 v0 = self.type2test(s)
127 self.assertEqual(len(v0), len(s))
128
129 s = "this is also a sequence"
130 vv = self.type2test(s)
131 self.assertEqual(len(vv), len(s))
132
133 # Create from various iteratables
134 for s in ("123", "", range(1000), ('do', 1.2), range(2000,2200,5)):
135 for g in (Sequence, IterFunc, IterGen,
136 itermulti, iterfunc):
137 self.assertEqual(self.type2test(g(s)), self.type2test(s))
138 self.assertEqual(self.type2test(IterFuncStop(s)), self.type2test())
139 self.assertEqual(self.type2test(c for c in "123"), self.type2test("123"))
140 self.assertRaises(TypeError, self.type2test, IterNextOnly(s))
141 self.assertRaises(TypeError, self.type2test, IterNoNext(s))
142 self.assertRaises(ZeroDivisionError, self.type2test, IterGenExc(s))
143
144 # Issue #23757
145 self.assertEqual(self.type2test(LyingTuple((2,))), self.type2test((1,)))
146 self.assertEqual(self.type2test(LyingList([2])), self.type2test([1]))
147
148 with self.assertRaises(TypeError):
149 self.type2test(unsupported_arg=[])
150
151 def test_truth(self):
152 self.assertFalse(self.type2test())
153 self.assertTrue(self.type2test([42]))
154
155 def test_getitem(self):
156 u = self.type2test([0, 1, 2, 3, 4])
157 for i in range(len(u)):
158 self.assertEqual(u[i], i)
159 self.assertEqual(u[int(i)], i)
160 for i in range(-len(u), -1):
161 self.assertEqual(u[i], len(u)+i)
162 self.assertEqual(u[int(i)], len(u)+i)
163 self.assertRaises(IndexError, u.__getitem__, -len(u)-1)
164 self.assertRaises(IndexError, u.__getitem__, len(u))
165 self.assertRaises(ValueError, u.__getitem__, slice(0,10,0))
166
167 u = self.type2test()
168 self.assertRaises(IndexError, u.__getitem__, 0)
169 self.assertRaises(IndexError, u.__getitem__, -1)
170
171 self.assertRaises(TypeError, u.__getitem__)
172
173 a = self.type2test([10, 11])
174 self.assertEqual(a[0], 10)
175 self.assertEqual(a[1], 11)
176 self.assertEqual(a[-2], 10)
177 self.assertEqual(a[-1], 11)
178 self.assertRaises(IndexError, a.__getitem__, -3)
179 self.assertRaises(IndexError, a.__getitem__, 3)
180
181 def test_getslice(self):
182 l = [0, 1, 2, 3, 4]
183 u = self.type2test(l)
184
185 self.assertEqual(u[0:0], self.type2test())
186 self.assertEqual(u[1:2], self.type2test([1]))
187 self.assertEqual(u[-2:-1], self.type2test([3]))
188 self.assertEqual(u[-1000:1000], u)
189 self.assertEqual(u[1000:-1000], self.type2test([]))
190 self.assertEqual(u[:], u)
191 self.assertEqual(u[1:None], self.type2test([1, 2, 3, 4]))
192 self.assertEqual(u[None:3], self.type2test([0, 1, 2]))
193
194 # Extended slices
195 self.assertEqual(u[::], u)
196 self.assertEqual(u[::2], self.type2test([0, 2, 4]))
197 self.assertEqual(u[1::2], self.type2test([1, 3]))
198 self.assertEqual(u[::-1], self.type2test([4, 3, 2, 1, 0]))
199 self.assertEqual(u[::-2], self.type2test([4, 2, 0]))
200 self.assertEqual(u[3::-2], self.type2test([3, 1]))
201 self.assertEqual(u[3:3:-2], self.type2test([]))
202 self.assertEqual(u[3:2:-2], self.type2test([3]))
203 self.assertEqual(u[3:1:-2], self.type2test([3]))
204 self.assertEqual(u[3:0:-2], self.type2test([3, 1]))
205 self.assertEqual(u[::-100], self.type2test([4]))
206 self.assertEqual(u[100:-100:], self.type2test([]))
207 self.assertEqual(u[-100:100:], u)
208 self.assertEqual(u[100:-100:-1], u[::-1])
209 self.assertEqual(u[-100:100:-1], self.type2test([]))
210 self.assertEqual(u[-100:100:2], self.type2test([0, 2, 4]))
211
212 # Test extreme cases with long ints
213 a = self.type2test([0,1,2,3,4])
214 self.assertEqual(a[ -pow(2,128): 3 ], self.type2test([0,1,2]))
215 self.assertEqual(a[ 3: pow(2,145) ], self.type2test([3,4]))
216 self.assertEqual(a[3::sys.maxsize], self.type2test([3]))
217
218 def test_contains(self):
219 u = self.type2test([0, 1, 2])
220 for i in u:
221 self.assertIn(i, u)
222 for i in min(u)-1, max(u)+1:
223 self.assertNotIn(i, u)
224
225 self.assertRaises(TypeError, u.__contains__)
226
227 def test_contains_fake(self):
228 # Sequences must use rich comparison against each item
229 # (unless "is" is true, or an earlier item answered)
230 # So ALWAYS_EQ must be found in all non-empty sequences.
231 self.assertNotIn(ALWAYS_EQ, self.type2test([]))
232 self.assertIn(ALWAYS_EQ, self.type2test([1]))
233 self.assertIn(1, self.type2test([ALWAYS_EQ]))
234 self.assertNotIn(NEVER_EQ, self.type2test([]))
235 self.assertNotIn(ALWAYS_EQ, self.type2test([NEVER_EQ]))
236 self.assertIn(NEVER_EQ, self.type2test([ALWAYS_EQ]))
237
238 def test_contains_order(self):
239 # Sequences must test in-order. If a rich comparison has side
240 # effects, these will be visible to tests against later members.
241 # In this test, the "side effect" is a short-circuiting raise.
242 class ESC[4;38;5;81mDoNotTestEq(ESC[4;38;5;149mException):
243 pass
244 class ESC[4;38;5;81mStopCompares:
245 def __eq__(self, other):
246 raise DoNotTestEq
247
248 checkfirst = self.type2test([1, StopCompares()])
249 self.assertIn(1, checkfirst)
250 checklast = self.type2test([StopCompares(), 1])
251 self.assertRaises(DoNotTestEq, checklast.__contains__, 1)
252
253 def test_len(self):
254 self.assertEqual(len(self.type2test()), 0)
255 self.assertEqual(len(self.type2test([])), 0)
256 self.assertEqual(len(self.type2test([0])), 1)
257 self.assertEqual(len(self.type2test([0, 1, 2])), 3)
258
259 def test_minmax(self):
260 u = self.type2test([0, 1, 2])
261 self.assertEqual(min(u), 0)
262 self.assertEqual(max(u), 2)
263
264 def test_addmul(self):
265 u1 = self.type2test([0])
266 u2 = self.type2test([0, 1])
267 self.assertEqual(u1, u1 + self.type2test())
268 self.assertEqual(u1, self.type2test() + u1)
269 self.assertEqual(u1 + self.type2test([1]), u2)
270 self.assertEqual(self.type2test([-1]) + u1, self.type2test([-1, 0]))
271 self.assertEqual(self.type2test(), u2*0)
272 self.assertEqual(self.type2test(), 0*u2)
273 self.assertEqual(self.type2test(), u2*0)
274 self.assertEqual(self.type2test(), 0*u2)
275 self.assertEqual(u2, u2*1)
276 self.assertEqual(u2, 1*u2)
277 self.assertEqual(u2, u2*1)
278 self.assertEqual(u2, 1*u2)
279 self.assertEqual(u2+u2, u2*2)
280 self.assertEqual(u2+u2, 2*u2)
281 self.assertEqual(u2+u2, u2*2)
282 self.assertEqual(u2+u2, 2*u2)
283 self.assertEqual(u2+u2+u2, u2*3)
284 self.assertEqual(u2+u2+u2, 3*u2)
285
286 class ESC[4;38;5;81msubclass(ESC[4;38;5;149mselfESC[4;38;5;149m.ESC[4;38;5;149mtype2test):
287 pass
288 u3 = subclass([0, 1])
289 self.assertEqual(u3, u3*1)
290 self.assertIsNot(u3, u3*1)
291
292 def test_iadd(self):
293 u = self.type2test([0, 1])
294 u += self.type2test()
295 self.assertEqual(u, self.type2test([0, 1]))
296 u += self.type2test([2, 3])
297 self.assertEqual(u, self.type2test([0, 1, 2, 3]))
298 u += self.type2test([4, 5])
299 self.assertEqual(u, self.type2test([0, 1, 2, 3, 4, 5]))
300
301 u = self.type2test("spam")
302 u += self.type2test("eggs")
303 self.assertEqual(u, self.type2test("spameggs"))
304
305 def test_imul(self):
306 u = self.type2test([0, 1])
307 u *= 3
308 self.assertEqual(u, self.type2test([0, 1, 0, 1, 0, 1]))
309 u *= 0
310 self.assertEqual(u, self.type2test([]))
311
312 def test_getitemoverwriteiter(self):
313 # Verify that __getitem__ overrides are not recognized by __iter__
314 class ESC[4;38;5;81mT(ESC[4;38;5;149mselfESC[4;38;5;149m.ESC[4;38;5;149mtype2test):
315 def __getitem__(self, key):
316 return str(key) + '!!!'
317 self.assertEqual(next(iter(T((1,2)))), 1)
318
319 def test_repeat(self):
320 for m in range(4):
321 s = tuple(range(m))
322 for n in range(-3, 5):
323 self.assertEqual(self.type2test(s*n), self.type2test(s)*n)
324 self.assertEqual(self.type2test(s)*(-4), self.type2test([]))
325 self.assertEqual(id(s), id(s*1))
326
327 def test_bigrepeat(self):
328 if sys.maxsize <= 2147483647:
329 x = self.type2test([0])
330 x *= 2**16
331 self.assertRaises(MemoryError, x.__mul__, 2**16)
332 if hasattr(x, '__imul__'):
333 self.assertRaises(MemoryError, x.__imul__, 2**16)
334
335 def test_subscript(self):
336 a = self.type2test([10, 11])
337 self.assertEqual(a.__getitem__(0), 10)
338 self.assertEqual(a.__getitem__(1), 11)
339 self.assertEqual(a.__getitem__(-2), 10)
340 self.assertEqual(a.__getitem__(-1), 11)
341 self.assertRaises(IndexError, a.__getitem__, -3)
342 self.assertRaises(IndexError, a.__getitem__, 3)
343 self.assertEqual(a.__getitem__(slice(0,1)), self.type2test([10]))
344 self.assertEqual(a.__getitem__(slice(1,2)), self.type2test([11]))
345 self.assertEqual(a.__getitem__(slice(0,2)), self.type2test([10, 11]))
346 self.assertEqual(a.__getitem__(slice(0,3)), self.type2test([10, 11]))
347 self.assertEqual(a.__getitem__(slice(3,5)), self.type2test([]))
348 self.assertRaises(ValueError, a.__getitem__, slice(0, 10, 0))
349 self.assertRaises(TypeError, a.__getitem__, 'x')
350
351 def test_count(self):
352 a = self.type2test([0, 1, 2])*3
353 self.assertEqual(a.count(0), 3)
354 self.assertEqual(a.count(1), 3)
355 self.assertEqual(a.count(3), 0)
356
357 self.assertEqual(a.count(ALWAYS_EQ), 9)
358 self.assertEqual(self.type2test([ALWAYS_EQ, ALWAYS_EQ]).count(1), 2)
359 self.assertEqual(self.type2test([ALWAYS_EQ, ALWAYS_EQ]).count(NEVER_EQ), 2)
360 self.assertEqual(self.type2test([NEVER_EQ, NEVER_EQ]).count(ALWAYS_EQ), 0)
361
362 self.assertRaises(TypeError, a.count)
363
364 class ESC[4;38;5;81mBadExc(ESC[4;38;5;149mException):
365 pass
366
367 class ESC[4;38;5;81mBadCmp:
368 def __eq__(self, other):
369 if other == 2:
370 raise BadExc()
371 return False
372
373 self.assertRaises(BadExc, a.count, BadCmp())
374
375 def test_index(self):
376 u = self.type2test([0, 1])
377 self.assertEqual(u.index(0), 0)
378 self.assertEqual(u.index(1), 1)
379 self.assertRaises(ValueError, u.index, 2)
380
381 u = self.type2test([-2, -1, 0, 0, 1, 2])
382 self.assertEqual(u.count(0), 2)
383 self.assertEqual(u.index(0), 2)
384 self.assertEqual(u.index(0, 2), 2)
385 self.assertEqual(u.index(-2, -10), 0)
386 self.assertEqual(u.index(0, 3), 3)
387 self.assertEqual(u.index(0, 3, 4), 3)
388 self.assertRaises(ValueError, u.index, 2, 0, -10)
389
390 self.assertEqual(u.index(ALWAYS_EQ), 0)
391 self.assertEqual(self.type2test([ALWAYS_EQ, ALWAYS_EQ]).index(1), 0)
392 self.assertEqual(self.type2test([ALWAYS_EQ, ALWAYS_EQ]).index(NEVER_EQ), 0)
393 self.assertRaises(ValueError, self.type2test([NEVER_EQ, NEVER_EQ]).index, ALWAYS_EQ)
394
395 self.assertRaises(TypeError, u.index)
396
397 class ESC[4;38;5;81mBadExc(ESC[4;38;5;149mException):
398 pass
399
400 class ESC[4;38;5;81mBadCmp:
401 def __eq__(self, other):
402 if other == 2:
403 raise BadExc()
404 return False
405
406 a = self.type2test([0, 1, 2, 3])
407 self.assertRaises(BadExc, a.index, BadCmp())
408
409 a = self.type2test([-2, -1, 0, 0, 1, 2])
410 self.assertEqual(a.index(0), 2)
411 self.assertEqual(a.index(0, 2), 2)
412 self.assertEqual(a.index(0, -4), 2)
413 self.assertEqual(a.index(-2, -10), 0)
414 self.assertEqual(a.index(0, 3), 3)
415 self.assertEqual(a.index(0, -3), 3)
416 self.assertEqual(a.index(0, 3, 4), 3)
417 self.assertEqual(a.index(0, -3, -2), 3)
418 self.assertEqual(a.index(0, -4*sys.maxsize, 4*sys.maxsize), 2)
419 self.assertRaises(ValueError, a.index, 0, 4*sys.maxsize,-4*sys.maxsize)
420 self.assertRaises(ValueError, a.index, 2, 0, -10)
421
422 def test_pickle(self):
423 lst = self.type2test([4, 5, 6, 7])
424 for proto in range(pickle.HIGHEST_PROTOCOL + 1):
425 lst2 = pickle.loads(pickle.dumps(lst, proto))
426 self.assertEqual(lst2, lst)
427 self.assertNotEqual(id(lst2), id(lst))
428
429 def test_free_after_iterating(self):
430 support.check_free_after_iterating(self, iter, self.type2test)
431 support.check_free_after_iterating(self, reversed, self.type2test)