Python code coverage for Lib/test/seq_tests.py

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