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