/Lib/test/test_bigaddrspace.py

 1from test import test_support
 2from test.test_support import bigaddrspacetest, MAX_Py_ssize_t
 3
 4import unittest
 5import operator
 6import sys
 7
 8
 9class StrTest(unittest.TestCase):
10
11    @bigaddrspacetest
12    def test_concat(self):
13        s1 = 'x' * MAX_Py_ssize_t
14        self.assertRaises(OverflowError, operator.add, s1, '?')
15
16    @bigaddrspacetest
17    def test_optimized_concat(self):
18        x = 'x' * MAX_Py_ssize_t
19        try:
20            x = x + '?'     # this statement uses a fast path in eval.cc
21        except OverflowError:
22            pass
23        else:
24            self.fail("should have raised OverflowError")
25        try:
26            x += '?'        # this statement uses a fast path in eval.cc
27        except OverflowError:
28            pass
29        else:
30            self.fail("should have raised OverflowError")
31        self.assertEquals(len(x), MAX_Py_ssize_t)
32
33    ### the following test is pending a patch
34    #   (http://mail.python.org/pipermail/python-dev/2006-July/067774.html)
35    #@bigaddrspacetest
36    #def test_repeat(self):
37    #    self.assertRaises(OverflowError, operator.mul, 'x', MAX_Py_ssize_t + 1)
38
39
40def test_main():
41    test_support.run_unittest(StrTest)
42
43if __name__ == '__main__':
44    if len(sys.argv) > 1:
45        test_support.set_memlimit(sys.argv[1])
46    test_main()