mirror of https://github.com/python/cpython
275 lines
8.9 KiB
Python
275 lines
8.9 KiB
Python
import sys
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from test import list_tests
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from test.support import cpython_only
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import pickle
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import unittest
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class ListTest(list_tests.CommonTest):
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type2test = list
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def test_basic(self):
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self.assertEqual(list([]), [])
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l0_3 = [0, 1, 2, 3]
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l0_3_bis = list(l0_3)
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self.assertEqual(l0_3, l0_3_bis)
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self.assertTrue(l0_3 is not l0_3_bis)
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self.assertEqual(list(()), [])
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self.assertEqual(list((0, 1, 2, 3)), [0, 1, 2, 3])
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self.assertEqual(list(''), [])
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self.assertEqual(list('spam'), ['s', 'p', 'a', 'm'])
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self.assertEqual(list(x for x in range(10) if x % 2),
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[1, 3, 5, 7, 9])
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if sys.maxsize == 0x7fffffff:
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# This test can currently only work on 32-bit machines.
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# XXX If/when PySequence_Length() returns a ssize_t, it should be
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# XXX re-enabled.
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# Verify clearing of bug #556025.
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# This assumes that the max data size (sys.maxint) == max
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# address size this also assumes that the address size is at
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# least 4 bytes with 8 byte addresses, the bug is not well
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# tested
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#
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# Note: This test is expected to SEGV under Cygwin 1.3.12 or
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# earlier due to a newlib bug. See the following mailing list
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# thread for the details:
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# http://sources.redhat.com/ml/newlib/2002/msg00369.html
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self.assertRaises(MemoryError, list, range(sys.maxsize // 2))
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# This code used to segfault in Py2.4a3
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x = []
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x.extend(-y for y in x)
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self.assertEqual(x, [])
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def test_keyword_args(self):
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with self.assertRaisesRegex(TypeError, 'keyword argument'):
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list(sequence=[])
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def test_keywords_in_subclass(self):
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class subclass(list):
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pass
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u = subclass([1, 2])
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self.assertIs(type(u), subclass)
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self.assertEqual(list(u), [1, 2])
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with self.assertRaises(TypeError):
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subclass(sequence=())
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class subclass_with_init(list):
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def __init__(self, seq, newarg=None):
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super().__init__(seq)
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self.newarg = newarg
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u = subclass_with_init([1, 2], newarg=3)
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self.assertIs(type(u), subclass_with_init)
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self.assertEqual(list(u), [1, 2])
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self.assertEqual(u.newarg, 3)
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class subclass_with_new(list):
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def __new__(cls, seq, newarg=None):
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self = super().__new__(cls, seq)
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self.newarg = newarg
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return self
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u = subclass_with_new([1, 2], newarg=3)
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self.assertIs(type(u), subclass_with_new)
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self.assertEqual(list(u), [1, 2])
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self.assertEqual(u.newarg, 3)
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def test_truth(self):
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super().test_truth()
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self.assertTrue(not [])
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self.assertTrue([42])
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def test_identity(self):
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self.assertTrue([] is not [])
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def test_len(self):
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super().test_len()
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self.assertEqual(len([]), 0)
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self.assertEqual(len([0]), 1)
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self.assertEqual(len([0, 1, 2]), 3)
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def test_overflow(self):
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lst = [4, 5, 6, 7]
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n = int((sys.maxsize*2+2) // len(lst))
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def mul(a, b): return a * b
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def imul(a, b): a *= b
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self.assertRaises((MemoryError, OverflowError), mul, lst, n)
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self.assertRaises((MemoryError, OverflowError), imul, lst, n)
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def test_list_resize_overflow(self):
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# gh-97616: test new_allocated * sizeof(PyObject*) overflow
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# check in list_resize()
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lst = [0] * 65
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del lst[1:]
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self.assertEqual(len(lst), 1)
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size = sys.maxsize
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with self.assertRaises((MemoryError, OverflowError)):
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lst * size
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with self.assertRaises((MemoryError, OverflowError)):
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lst *= size
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def test_repr_large(self):
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# Check the repr of large list objects
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def check(n):
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l = [0] * n
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s = repr(l)
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self.assertEqual(s,
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'[' + ', '.join(['0'] * n) + ']')
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check(10) # check our checking code
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check(1000000)
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def test_iterator_pickle(self):
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orig = self.type2test([4, 5, 6, 7])
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data = [10, 11, 12, 13, 14, 15]
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for proto in range(pickle.HIGHEST_PROTOCOL + 1):
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# initial iterator
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itorig = iter(orig)
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d = pickle.dumps((itorig, orig), proto)
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it, a = pickle.loads(d)
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a[:] = data
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self.assertEqual(type(it), type(itorig))
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self.assertEqual(list(it), data)
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# running iterator
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next(itorig)
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d = pickle.dumps((itorig, orig), proto)
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it, a = pickle.loads(d)
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a[:] = data
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self.assertEqual(type(it), type(itorig))
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self.assertEqual(list(it), data[1:])
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# empty iterator
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for i in range(1, len(orig)):
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next(itorig)
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d = pickle.dumps((itorig, orig), proto)
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it, a = pickle.loads(d)
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a[:] = data
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self.assertEqual(type(it), type(itorig))
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self.assertEqual(list(it), data[len(orig):])
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# exhausted iterator
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self.assertRaises(StopIteration, next, itorig)
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d = pickle.dumps((itorig, orig), proto)
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it, a = pickle.loads(d)
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a[:] = data
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self.assertEqual(list(it), [])
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def test_reversed_pickle(self):
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orig = self.type2test([4, 5, 6, 7])
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data = [10, 11, 12, 13, 14, 15]
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for proto in range(pickle.HIGHEST_PROTOCOL + 1):
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# initial iterator
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itorig = reversed(orig)
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d = pickle.dumps((itorig, orig), proto)
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it, a = pickle.loads(d)
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a[:] = data
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self.assertEqual(type(it), type(itorig))
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self.assertEqual(list(it), data[len(orig)-1::-1])
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# running iterator
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next(itorig)
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d = pickle.dumps((itorig, orig), proto)
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it, a = pickle.loads(d)
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a[:] = data
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self.assertEqual(type(it), type(itorig))
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self.assertEqual(list(it), data[len(orig)-2::-1])
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# empty iterator
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for i in range(1, len(orig)):
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next(itorig)
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d = pickle.dumps((itorig, orig), proto)
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it, a = pickle.loads(d)
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a[:] = data
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self.assertEqual(type(it), type(itorig))
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self.assertEqual(list(it), [])
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# exhausted iterator
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self.assertRaises(StopIteration, next, itorig)
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d = pickle.dumps((itorig, orig), proto)
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it, a = pickle.loads(d)
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a[:] = data
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self.assertEqual(list(it), [])
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def test_step_overflow(self):
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a = [0, 1, 2, 3, 4]
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a[1::sys.maxsize] = [0]
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self.assertEqual(a[3::sys.maxsize], [3])
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def test_no_comdat_folding(self):
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# Issue 8847: In the PGO build, the MSVC linker's COMDAT folding
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# optimization causes failures in code that relies on distinct
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# function addresses.
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class L(list): pass
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with self.assertRaises(TypeError):
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(3,) + L([1,2])
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def test_equal_operator_modifying_operand(self):
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# test fix for seg fault reported in bpo-38588 part 2.
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class X:
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def __eq__(self,other) :
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list2.clear()
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return NotImplemented
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class Y:
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def __eq__(self, other):
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list1.clear()
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return NotImplemented
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class Z:
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def __eq__(self, other):
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list3.clear()
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return NotImplemented
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list1 = [X()]
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list2 = [Y()]
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self.assertTrue(list1 == list2)
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list3 = [Z()]
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list4 = [1]
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self.assertFalse(list3 == list4)
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@cpython_only
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def test_preallocation(self):
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iterable = [0] * 10
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iter_size = sys.getsizeof(iterable)
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self.assertEqual(iter_size, sys.getsizeof(list([0] * 10)))
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self.assertEqual(iter_size, sys.getsizeof(list(range(10))))
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def test_count_index_remove_crashes(self):
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# bpo-38610: The count(), index(), and remove() methods were not
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# holding strong references to list elements while calling
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# PyObject_RichCompareBool().
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class X:
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def __eq__(self, other):
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lst.clear()
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return NotImplemented
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lst = [X()]
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with self.assertRaises(ValueError):
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lst.index(lst)
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class L(list):
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def __eq__(self, other):
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str(other)
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return NotImplemented
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lst = L([X()])
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lst.count(lst)
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lst = L([X()])
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with self.assertRaises(ValueError):
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lst.remove(lst)
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# bpo-39453: list.__contains__ was not holding strong references
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# to list elements while calling PyObject_RichCompareBool().
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lst = [X(), X()]
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3 in lst
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lst = [X(), X()]
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X() in lst
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if __name__ == "__main__":
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unittest.main()
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