1 import sys 2 from test import support 3 import unittest 4 from ctypes import * 5 from ctypes.test import need_symbol 6 7 class MemFunctionsTest(unittest.TestCase): 8 @unittest.skip('test disabled') 9 def test_overflow(self): 10 # string_at and wstring_at must use the Python calling 11 # convention (which acquires the GIL and checks the Python 12 # error flag). Provoke an error and catch it; see also issue 13 # #3554: <http://bugs.python.org/issue3554> 14 self.assertRaises((OverflowError, MemoryError, SystemError), 15 lambda: wstring_at(u"foo", sys.maxint - 1)) 16 self.assertRaises((OverflowError, MemoryError, SystemError), 17 lambda: string_at("foo", sys.maxint - 1)) 18 19 def test_memmove(self): 20 # large buffers apparently increase the chance that the memory 21 # is allocated in high address space. 22 a = create_string_buffer(1000000) 23 p = b"Hello, World" 24 result = memmove(a, p, len(p)) 25 self.assertEqual(a.value, b"Hello, World") 26 27 self.assertEqual(string_at(result), b"Hello, World") 28 self.assertEqual(string_at(result, 5), b"Hello") 29 self.assertEqual(string_at(result, 16), b"Hello, World\0\0\0\0") 30 self.assertEqual(string_at(result, 0), b"") 31 32 def test_memset(self): 33 a = create_string_buffer(1000000) 34 result = memset(a, ord('x'), 16) 35 self.assertEqual(a.value, b"xxxxxxxxxxxxxxxx") 36 37 self.assertEqual(string_at(result), b"xxxxxxxxxxxxxxxx") 38 self.assertEqual(string_at(a), b"xxxxxxxxxxxxxxxx") 39 self.assertEqual(string_at(a, 20), b"xxxxxxxxxxxxxxxx\0\0\0\0") 40 41 def test_cast(self): 42 a = (c_ubyte * 32)(*map(ord, "abcdef")) 43 self.assertEqual(cast(a, c_char_p).value, b"abcdef") 44 self.assertEqual(cast(a, POINTER(c_byte))[:7], 45 [97, 98, 99, 100, 101, 102, 0]) 46 self.assertEqual(cast(a, POINTER(c_byte))[:7:], 47 [97, 98, 99, 100, 101, 102, 0]) 48 self.assertEqual(cast(a, POINTER(c_byte))[6:-1:-1], 49 [0, 102, 101, 100, 99, 98, 97]) 50 self.assertEqual(cast(a, POINTER(c_byte))[:7:2], 51 [97, 99, 101, 0]) 52 self.assertEqual(cast(a, POINTER(c_byte))[:7:7], 53 [97]) 54 55 @support.refcount_test 56 def test_string_at(self): 57 s = string_at(b"foo bar") 58 # XXX The following may be wrong, depending on how Python 59 # manages string instances 60 self.assertEqual(2, sys.getrefcount(s)) 61 self.assertTrue(s, "foo bar") 62 63 self.assertEqual(string_at(b"foo bar", 7), b"foo bar") 64 self.assertEqual(string_at(b"foo bar", 3), b"foo") 65 66 @need_symbol('create_unicode_buffer') 67 def test_wstring_at(self): 68 p = create_unicode_buffer("Hello, World") 69 a = create_unicode_buffer(1000000) 70 result = memmove(a, p, len(p) * sizeof(c_wchar)) 71 self.assertEqual(a.value, "Hello, World") 72 73 self.assertEqual(wstring_at(a), "Hello, World") 74 self.assertEqual(wstring_at(a, 5), "Hello") 75 self.assertEqual(wstring_at(a, 16), "Hello, World\0\0\0\0") 76 self.assertEqual(wstring_at(a, 0), "") 77 78 if __name__ == "__main__": 79 unittest.main() 80
