import sys from test import 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, 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_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)