bernsteinbear.com
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1#!/usr/bin/env python3
2# Copyright (c) Facebook, Inc. and its affiliates. (http://www.facebook.com)
3# WARNING: This is a temporary copy of code from the cpython library to
4# facilitate bringup. Please file a task for anything you change!
5# flake8: noqa
6# fmt: off
7"""
8Tests common to tuple, list and UserList.UserList
9"""
10
11import pickle
12import sys
13import unittest
14from test import support
15
16# Various iterables
17# This is used for checking the constructor (here and in test_deque.py)
18def iterfunc(seqn):
19 'Regular generator'
20 for i in seqn:
21 yield i
22
23class Sequence:
24 'Sequence using __getitem__'
25 def __init__(self, seqn):
26 self.seqn = seqn
27 def __getitem__(self, i):
28 return self.seqn[i]
29
30class IterFunc:
31 'Sequence using iterator protocol'
32 def __init__(self, seqn):
33 self.seqn = seqn
34 self.i = 0
35 def __iter__(self):
36 return self
37 def __next__(self):
38 if self.i >= len(self.seqn): raise StopIteration
39 v = self.seqn[self.i]
40 self.i += 1
41 return v
42
43class IterGen:
44 'Sequence using iterator protocol defined with a generator'
45 def __init__(self, seqn):
46 self.seqn = seqn
47 self.i = 0
48 def __iter__(self):
49 for val in self.seqn:
50 yield val
51
52class IterNextOnly:
53 'Missing __getitem__ and __iter__'
54 def __init__(self, seqn):
55 self.seqn = seqn
56 self.i = 0
57 def __next__(self):
58 if self.i >= len(self.seqn): raise StopIteration
59 v = self.seqn[self.i]
60 self.i += 1
61 return v
62
63class IterNoNext:
64 'Iterator missing __next__()'
65 def __init__(self, seqn):
66 self.seqn = seqn
67 self.i = 0
68 def __iter__(self):
69 return self
70
71class IterGenExc:
72 'Test propagation of exceptions'
73 def __init__(self, seqn):
74 self.seqn = seqn
75 self.i = 0
76 def __iter__(self):
77 return self
78 def __next__(self):
79 3 // 0
80
81class IterFuncStop:
82 'Test immediate stop'
83 def __init__(self, seqn):
84 pass
85 def __iter__(self):
86 return self
87 def __next__(self):
88 raise StopIteration
89
90from itertools import chain
91def itermulti(seqn):
92 'Test multiple tiers of iterators'
93 return chain(map(lambda x:x, iterfunc(IterGen(Sequence(seqn)))))
94
95class LyingTuple(tuple):
96 def __iter__(self):
97 yield 1
98
99class LyingList(list):
100 def __iter__(self):
101 yield 1
102
103class CommonTest(unittest.TestCase):
104 # The type to be tested
105 type2test = None
106
107 def test_constructors(self):
108 l0 = []
109 l1 = [0]
110 l2 = [0, 1]
111
112 u = self.type2test()
113 u0 = self.type2test(l0)
114 u1 = self.type2test(l1)
115 u2 = self.type2test(l2)
116
117 uu = self.type2test(u)
118 uu0 = self.type2test(u0)
119 uu1 = self.type2test(u1)
120 uu2 = self.type2test(u2)
121
122 v = self.type2test(tuple(u))
123 class OtherSeq:
124 def __init__(self, initseq):
125 self.__data = initseq
126 def __len__(self):
127 return len(self.__data)
128 def __getitem__(self, i):
129 return self.__data[i]
130 s = OtherSeq(u0)
131 v0 = self.type2test(s)
132 self.assertEqual(len(v0), len(s))
133
134 s = "this is also a sequence"
135 vv = self.type2test(s)
136 self.assertEqual(len(vv), len(s))
137
138 # Create from various iteratables
139 for s in ("123", "", range(1000), ('do', 1.2), range(2000,2200,5)):
140 for g in (Sequence, IterFunc, IterGen,
141 itermulti, iterfunc):
142 self.assertEqual(self.type2test(g(s)), self.type2test(s))
143 self.assertEqual(self.type2test(IterFuncStop(s)), self.type2test())
144 self.assertEqual(self.type2test(c for c in "123"), self.type2test("123"))
145 self.assertRaises(TypeError, self.type2test, IterNextOnly(s))
146 self.assertRaises(TypeError, self.type2test, IterNoNext(s))
147 self.assertRaises(ZeroDivisionError, self.type2test, IterGenExc(s))
148
149 # Issue #23757
150 self.assertEqual(self.type2test(LyingTuple((2,))), self.type2test((1,)))
151 self.assertEqual(self.type2test(LyingList([2])), self.type2test([1]))
152
153 def test_truth(self):
154 self.assertFalse(self.type2test())
155 self.assertTrue(self.type2test([42]))
156
157 def test_getitem(self):
158 u = self.type2test([0, 1, 2, 3, 4])
159 for i in range(len(u)):
160 self.assertEqual(u[i], i)
161 self.assertEqual(u[int(i)], i)
162 for i in range(-len(u), -1):
163 self.assertEqual(u[i], len(u)+i)
164 self.assertEqual(u[int(i)], len(u)+i)
165 self.assertRaises(IndexError, u.__getitem__, -len(u)-1)
166 self.assertRaises(IndexError, u.__getitem__, len(u))
167 self.assertRaises(ValueError, u.__getitem__, slice(0,10,0))
168
169 u = self.type2test()
170 self.assertRaises(IndexError, u.__getitem__, 0)
171 self.assertRaises(IndexError, u.__getitem__, -1)
172
173 self.assertRaises(TypeError, u.__getitem__)
174
175 a = self.type2test([10, 11])
176 self.assertEqual(a[0], 10)
177 self.assertEqual(a[1], 11)
178 self.assertEqual(a[-2], 10)
179 self.assertEqual(a[-1], 11)
180 self.assertRaises(IndexError, a.__getitem__, -3)
181 self.assertRaises(IndexError, a.__getitem__, 3)
182
183 def test_getslice(self):
184 l = [0, 1, 2, 3, 4]
185 u = self.type2test(l)
186
187 self.assertEqual(u[0:0], self.type2test())
188 self.assertEqual(u[1:2], self.type2test([1]))
189 self.assertEqual(u[-2:-1], self.type2test([3]))
190 self.assertEqual(u[-1000:1000], u)
191 self.assertEqual(u[1000:-1000], self.type2test([]))
192 self.assertEqual(u[:], u)
193 self.assertEqual(u[1:None], self.type2test([1, 2, 3, 4]))
194 self.assertEqual(u[None:3], self.type2test([0, 1, 2]))
195
196 # Extended slices
197 self.assertEqual(u[::], u)
198 self.assertEqual(u[::2], self.type2test([0, 2, 4]))
199 self.assertEqual(u[1::2], self.type2test([1, 3]))
200 self.assertEqual(u[::-1], self.type2test([4, 3, 2, 1, 0]))
201 self.assertEqual(u[::-2], self.type2test([4, 2, 0]))
202 self.assertEqual(u[3::-2], self.type2test([3, 1]))
203 self.assertEqual(u[3:3:-2], self.type2test([]))
204 self.assertEqual(u[3:2:-2], self.type2test([3]))
205 self.assertEqual(u[3:1:-2], self.type2test([3]))
206 self.assertEqual(u[3:0:-2], self.type2test([3, 1]))
207 self.assertEqual(u[::-100], self.type2test([4]))
208 self.assertEqual(u[100:-100:], self.type2test([]))
209 self.assertEqual(u[-100:100:], u)
210 self.assertEqual(u[100:-100:-1], u[::-1])
211 self.assertEqual(u[-100:100:-1], self.type2test([]))
212 self.assertEqual(u[-100:100:2], self.type2test([0, 2, 4]))
213
214 # Test extreme cases with long ints
215 a = self.type2test([0,1,2,3,4])
216 self.assertEqual(a[ -pow(2,128): 3 ], self.type2test([0,1,2]))
217 self.assertEqual(a[ 3: pow(2,145) ], self.type2test([3,4]))
218 self.assertEqual(a[3::sys.maxsize], self.type2test([3]))
219
220 def test_contains(self):
221 u = self.type2test([0, 1, 2])
222 for i in u:
223 self.assertIn(i, u)
224 for i in min(u)-1, max(u)+1:
225 self.assertNotIn(i, u)
226
227 self.assertRaises(TypeError, u.__contains__)
228
229 def test_contains_fake(self):
230 class AllEq:
231 # Sequences must use rich comparison against each item
232 # (unless "is" is true, or an earlier item answered)
233 # So instances of AllEq must be found in all non-empty sequences.
234 def __eq__(self, other):
235 return True
236 __hash__ = None # Can't meet hash invariant requirements
237 self.assertNotIn(AllEq(), self.type2test([]))
238 self.assertIn(AllEq(), self.type2test([1]))
239
240 def test_contains_order(self):
241 # Sequences must test in-order. If a rich comparison has side
242 # effects, these will be visible to tests against later members.
243 # In this test, the "side effect" is a short-circuiting raise.
244 class DoNotTestEq(Exception):
245 pass
246 class StopCompares:
247 def __eq__(self, other):
248 raise DoNotTestEq
249
250 checkfirst = self.type2test([1, StopCompares()])
251 self.assertIn(1, checkfirst)
252 checklast = self.type2test([StopCompares(), 1])
253 self.assertRaises(DoNotTestEq, checklast.__contains__, 1)
254
255 def test_len(self):
256 self.assertEqual(len(self.type2test()), 0)
257 self.assertEqual(len(self.type2test([])), 0)
258 self.assertEqual(len(self.type2test([0])), 1)
259 self.assertEqual(len(self.type2test([0, 1, 2])), 3)
260
261 def test_minmax(self):
262 u = self.type2test([0, 1, 2])
263 self.assertEqual(min(u), 0)
264 self.assertEqual(max(u), 2)
265
266 def test_addmul(self):
267 u1 = self.type2test([0])
268 u2 = self.type2test([0, 1])
269 self.assertEqual(u1, u1 + self.type2test())
270 self.assertEqual(u1, self.type2test() + u1)
271 self.assertEqual(u1 + self.type2test([1]), u2)
272 self.assertEqual(self.type2test([-1]) + u1, self.type2test([-1, 0]))
273 self.assertEqual(self.type2test(), u2*0)
274 self.assertEqual(self.type2test(), 0*u2)
275 self.assertEqual(self.type2test(), u2*0)
276 self.assertEqual(self.type2test(), 0*u2)
277 self.assertEqual(u2, u2*1)
278 self.assertEqual(u2, 1*u2)
279 self.assertEqual(u2, u2*1)
280 self.assertEqual(u2, 1*u2)
281 self.assertEqual(u2+u2, u2*2)
282 self.assertEqual(u2+u2, 2*u2)
283 self.assertEqual(u2+u2, u2*2)
284 self.assertEqual(u2+u2, 2*u2)
285 self.assertEqual(u2+u2+u2, u2*3)
286 self.assertEqual(u2+u2+u2, 3*u2)
287
288 class subclass(self.type2test):
289 pass
290 u3 = subclass([0, 1])
291 self.assertEqual(u3, u3*1)
292 self.assertIsNot(u3, u3*1)
293
294 def test_iadd(self):
295 u = self.type2test([0, 1])
296 u += self.type2test()
297 self.assertEqual(u, self.type2test([0, 1]))
298 u += self.type2test([2, 3])
299 self.assertEqual(u, self.type2test([0, 1, 2, 3]))
300 u += self.type2test([4, 5])
301 self.assertEqual(u, self.type2test([0, 1, 2, 3, 4, 5]))
302
303 u = self.type2test("spam")
304 u += self.type2test("eggs")
305 self.assertEqual(u, self.type2test("spameggs"))
306
307 def test_imul(self):
308 u = self.type2test([0, 1])
309 u *= 3
310 self.assertEqual(u, self.type2test([0, 1, 0, 1, 0, 1]))
311 u *= 0
312 self.assertEqual(u, self.type2test([]))
313
314 def test_getitemoverwriteiter(self):
315 # Verify that __getitem__ overrides are not recognized by __iter__
316 class T(self.type2test):
317 def __getitem__(self, key):
318 return str(key) + '!!!'
319 self.assertEqual(next(iter(T((1,2)))), 1)
320
321 def test_repeat(self):
322 for m in range(4):
323 s = tuple(range(m))
324 for n in range(-3, 5):
325 self.assertEqual(self.type2test(s*n), self.type2test(s)*n)
326 self.assertEqual(self.type2test(s)*(-4), self.type2test([]))
327 self.assertEqual(id(s), id(s*1))
328
329 def test_bigrepeat(self):
330 if sys.maxsize <= 2147483647:
331 x = self.type2test([0])
332 x *= 2**16
333 self.assertRaises(MemoryError, x.__mul__, 2**16)
334 if hasattr(x, '__imul__'):
335 self.assertRaises(MemoryError, x.__imul__, 2**16)
336
337 def test_subscript(self):
338 a = self.type2test([10, 11])
339 self.assertEqual(a.__getitem__(0), 10)
340 self.assertEqual(a.__getitem__(1), 11)
341 self.assertEqual(a.__getitem__(-2), 10)
342 self.assertEqual(a.__getitem__(-1), 11)
343 self.assertRaises(IndexError, a.__getitem__, -3)
344 self.assertRaises(IndexError, a.__getitem__, 3)
345 self.assertEqual(a.__getitem__(slice(0,1)), self.type2test([10]))
346 self.assertEqual(a.__getitem__(slice(1,2)), self.type2test([11]))
347 self.assertEqual(a.__getitem__(slice(0,2)), self.type2test([10, 11]))
348 self.assertEqual(a.__getitem__(slice(0,3)), self.type2test([10, 11]))
349 self.assertEqual(a.__getitem__(slice(3,5)), self.type2test([]))
350 self.assertRaises(ValueError, a.__getitem__, slice(0, 10, 0))
351 self.assertRaises(TypeError, a.__getitem__, 'x')
352
353 def test_count(self):
354 a = self.type2test([0, 1, 2])*3
355 self.assertEqual(a.count(0), 3)
356 self.assertEqual(a.count(1), 3)
357 self.assertEqual(a.count(3), 0)
358
359 self.assertRaises(TypeError, a.count)
360
361 class BadExc(Exception):
362 pass
363
364 class BadCmp:
365 def __eq__(self, other):
366 if other == 2:
367 raise BadExc()
368 return False
369
370 self.assertRaises(BadExc, a.count, BadCmp())
371
372 def test_index(self):
373 u = self.type2test([0, 1])
374 self.assertEqual(u.index(0), 0)
375 self.assertEqual(u.index(1), 1)
376 self.assertRaises(ValueError, u.index, 2)
377
378 u = self.type2test([-2, -1, 0, 0, 1, 2])
379 self.assertEqual(u.count(0), 2)
380 self.assertEqual(u.index(0), 2)
381 self.assertEqual(u.index(0, 2), 2)
382 self.assertEqual(u.index(-2, -10), 0)
383 self.assertEqual(u.index(0, 3), 3)
384 self.assertEqual(u.index(0, 3, 4), 3)
385 self.assertRaises(ValueError, u.index, 2, 0, -10)
386
387 self.assertRaises(TypeError, u.index)
388
389 class BadExc(Exception):
390 pass
391
392 class BadCmp:
393 def __eq__(self, other):
394 if other == 2:
395 raise BadExc()
396 return False
397
398 a = self.type2test([0, 1, 2, 3])
399 self.assertRaises(BadExc, a.index, BadCmp())
400
401 a = self.type2test([-2, -1, 0, 0, 1, 2])
402 self.assertEqual(a.index(0), 2)
403 self.assertEqual(a.index(0, 2), 2)
404 self.assertEqual(a.index(0, -4), 2)
405 self.assertEqual(a.index(-2, -10), 0)
406 self.assertEqual(a.index(0, 3), 3)
407 self.assertEqual(a.index(0, -3), 3)
408 self.assertEqual(a.index(0, 3, 4), 3)
409 self.assertEqual(a.index(0, -3, -2), 3)
410 self.assertEqual(a.index(0, -4*sys.maxsize, 4*sys.maxsize), 2)
411 self.assertRaises(ValueError, a.index, 0, 4*sys.maxsize,-4*sys.maxsize)
412 self.assertRaises(ValueError, a.index, 2, 0, -10)
413
414 def test_pickle(self):
415 lst = self.type2test([4, 5, 6, 7])
416 for proto in range(pickle.HIGHEST_PROTOCOL + 1):
417 lst2 = pickle.loads(pickle.dumps(lst, proto))
418 self.assertEqual(lst2, lst)
419 self.assertNotEqual(id(lst2), id(lst))
420
421 @unittest.skip("garbage collection different in pyro")
422 def test_free_after_iterating(self):
423 support.check_free_after_iterating(self, iter, self.type2test)
424 support.check_free_after_iterating(self, reversed, self.type2test)