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from ctypes import *
import unittest, sys
from ctypes.test import is_resource_enabled
################################################################
# This section should be moved into ctypes\__init__.py, when it's ready.
from _ctypes import PyObj_FromPtr
################################################################
from sys import getrefcount as grc
if sys.version_info > (2, 4):
c_py_ssize_t = c_size_t
else:
c_py_ssize_t = c_int
class PythonAPITestCase(unittest.TestCase):
def test_PyString_FromStringAndSize(self):
PyString_FromStringAndSize = pythonapi.PyString_FromStringAndSize
PyString_FromStringAndSize.restype = py_object
PyString_FromStringAndSize.argtypes = c_char_p, c_py_ssize_t
self.assertEqual(PyString_FromStringAndSize("abcdefghi", 3), "abc")
def test_PyString_FromString(self):
pythonapi.PyString_FromString.restype = py_object
pythonapi.PyString_FromString.argtypes = (c_char_p,)
s = "abc"
refcnt = grc(s)
pyob = pythonapi.PyString_FromString(s)
self.assertEqual(grc(s), refcnt)
self.assertEqual(s, pyob)
del pyob
self.assertEqual(grc(s), refcnt)
if is_resource_enabled("refcount"):
# This test is unreliable, because it is possible that code in
# unittest changes the refcount of the '42' integer. So, it
# is disabled by default.
def test_PyInt_Long(self):
ref42 = grc(42)
pythonapi.PyInt_FromLong.restype = py_object
self.assertEqual(pythonapi.PyInt_FromLong(42), 42)
self.assertEqual(grc(42), ref42)
pythonapi.PyInt_AsLong.argtypes = (py_object,)
pythonapi.PyInt_AsLong.restype = c_long
res = pythonapi.PyInt_AsLong(42)
self.assertEqual(grc(res), ref42 + 1)
del res
self.assertEqual(grc(42), ref42)
def test_PyObj_FromPtr(self):
s = "abc def ghi jkl"
ref = grc(s)
# id(python-object) is the address
pyobj = PyObj_FromPtr(id(s))
self.assertTrue(s is pyobj)
self.assertEqual(grc(s), ref + 1)
del pyobj
self.assertEqual(grc(s), ref)
def test_PyOS_snprintf(self):
PyOS_snprintf = pythonapi.PyOS_snprintf
PyOS_snprintf.argtypes = POINTER(c_char), c_size_t, c_char_p
buf = c_buffer(256)
PyOS_snprintf(buf, sizeof(buf), "Hello from %s", "ctypes")
self.assertEqual(buf.value, "Hello from ctypes")
PyOS_snprintf(buf, sizeof(buf), "Hello from %s", "ctypes", 1, 2, 3)
self.assertEqual(buf.value, "Hello from ctypes")
# not enough arguments
self.assertRaises(TypeError, PyOS_snprintf, buf)
def test_pyobject_repr(self):
self.assertEqual(repr(py_object()), "py_object(<NULL>)")
self.assertEqual(repr(py_object(42)), "py_object(42)")
self.assertEqual(repr(py_object(object)), "py_object(%r)" % object)
if __name__ == "__main__":
unittest.main()
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