import sys
from test import support, list_tests
import pickle
class ListTest(list_tests.CommonTest):
type2test = list
def test_basic(self):
self.assertEqual(list([]), [])
l0_3 = [0, 1, 2, 3]
l0_3_bis = list(l0_3)
self.assertEqual(l0_3, l0_3_bis)
self.assertTrue(l0_3 is not l0_3_bis)
self.assertEqual(list(()), [])
self.assertEqual(list((0, 1, 2, 3)), [0, 1, 2, 3])
self.assertEqual(list(''), [])
self.assertEqual(list('spam'), ['s', 'p', 'a', 'm'])
if sys.maxsize == 0x7fffffff:
# This test can currently only work on 32-bit machines.
# XXX If/when PySequence_Length() returns a ssize_t, it should be
# XXX re-enabled.
# Verify clearing of bug #556025.
# This assumes that the max data size (sys.maxint) == max
# address size this also assumes that the address size is at
# least 4 bytes with 8 byte addresses, the bug is not well
# tested
#
# Note: This test is expected to SEGV under Cygwin 1.3.12 or
# earlier due to a newlib bug. See the following mailing list
# thread for the details:
# http://sources.redhat.com/ml/newlib/2002/msg00369.html
self.assertRaises(MemoryError, list, range(sys.maxsize // 2))
# This code used to segfault in Py2.4a3
x = []
x.extend(-y for y in x)
self.assertEqual(x, [])
def test_truth(self):
super().test_truth()
self.assertTrue(not [])
self.assertTrue([42])
def test_identity(self):
self.assertTrue([] is not [])
def test_len(self):
super().test_len()
self.assertEqual(len([]), 0)
self.assertEqual(len([0]), 1)
self.assertEqual(len([0, 1, 2]), 3)
def test_overflow(self):
lst = [4, 5, 6, 7]
n = int((sys.maxsize*2+2) // len(lst))
def mul(a, b): return a * b
def imul(a, b): a *= b
self.assertRaises((MemoryError, OverflowError), mul, lst, n)
self.assertRaises((MemoryError, OverflowError), imul, lst, n)
def test_repr_large(self):
# Check the repr of large list objects
def check(n):
l = [0] * n
s = repr(l)
self.assertEqual(s,
'[' + ', '.join(['0'] * n) + ']')
check(10) # check our checking code
check(1000000)
def test_iterator_pickle(self):
# Userlist iterators don't support pickling yet since
# they are based on generators.
data = self.type2test([4, 5, 6, 7])
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
it = itorg = iter(data)
d = pickle.dumps(it, proto)
it = pickle.loads(d)
self.assertEqual(type(itorg), type(it))
self.assertEqual(self.type2test(it), self.type2test(data))
it = pickle.loads(d)
next(it)
d = pickle.dumps(it, proto)
self.assertEqual(self.type2test(it), self.type2test(data)[1:])
def test_reversed_pickle(self):
data = self.type2test([4, 5, 6, 7])
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
it = itorg = reversed(data)
d = pickle.dumps(it, proto)
it = pickle.loads(d)
self.assertEqual(type(itorg), type(it))
self.assertEqual(self.type2test(it), self.type2test(reversed(data)))
it = pickle.loads(d)
next(it)
d = pickle.dumps(it, proto)
self.assertEqual(self.type2test(it), self.type2test(reversed(data))[1:])
def test_no_comdat_folding(self):
# Issue 8847: In the PGO build, the MSVC linker's COMDAT folding
# optimization causes failures in code that relies on distinct
# function addresses.
class L(list): pass
with self.assertRaises(TypeError):
(3,) + L([1,2])
def test_main(verbose=None):
support.run_unittest(ListTest)
# verify reference counting
import sys
if verbose and hasattr(sys, "gettotalrefcount"):
import gc
counts = [None] * 5
for i in range(len(counts)):
support.run_unittest(ListTest)
gc.collect()
counts[i] = sys.gettotalrefcount()
print(counts)
if __name__ == "__main__":
test_main(verbose=True)