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✏️ test_list.py

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import sys
from test import test_support, list_tests

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, xrange(sys.maxint // 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(ListTest, self).test_truth()
        self.assertTrue(not [])
        self.assertTrue([42])

def test_identity(self):
        self.assertTrue([] is not [])

def test_len(self):
        super(ListTest, self).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_main(verbose=None):
    test_support.run_unittest(ListTest)

# verify reference counting
    import sys
    if verbose and hasattr(sys, "gettotalrefcount"):
        import gc
        counts = [None] * 5
        for i in xrange(len(counts)):
            test_support.run_unittest(ListTest)
            gc.collect()
            counts[i] = sys.gettotalrefcount()
        print counts

if __name__ == "__main__":
    test_main(verbose=True)

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✏️ test_list.py