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import unittest
import contextlib
import sys
from test import support
from test.support import import_helper
try:
import _testlimitedcapi
except ImportError:
_testlimitedcapi = None
NULL = None
class CAPITest(unittest.TestCase):
# TODO: Test the following functions:
#
# PySys_Audit()
# PySys_AuditTuple()
maxDiff = None
@support.cpython_only
@unittest.skipIf(_testlimitedcapi is None, 'need _testlimitedcapi module')
def test_sys_getobject(self):
# Test PySys_GetObject()
getobject = _testlimitedcapi.sys_getobject
self.assertIs(getobject(b'stdout'), sys.stdout)
with support.swap_attr(sys, '\U0001f40d', 42):
self.assertEqual(getobject('\U0001f40d'.encode()), 42)
self.assertIs(getobject(b'nonexisting'), AttributeError)
with support.catch_unraisable_exception() as cm:
self.assertIs(getobject(b'\xff'), AttributeError)
self.assertEqual(cm.unraisable.exc_type, UnicodeDecodeError)
self.assertRegex(str(cm.unraisable.exc_value),
"'utf-8' codec can't decode")
# CRASHES getobject(NULL)
@support.cpython_only
@unittest.skipIf(_testlimitedcapi is None, 'need _testlimitedcapi module')
def test_sys_setobject(self):
# Test PySys_SetObject()
setobject = _testlimitedcapi.sys_setobject
value = ['value']
value2 = ['value2']
try:
self.assertEqual(setobject(b'newattr', value), 0)
self.assertIs(sys.newattr, value)
self.assertEqual(setobject(b'newattr', value2), 0)
self.assertIs(sys.newattr, value2)
self.assertEqual(setobject(b'newattr', NULL), 0)
self.assertNotHasAttr(sys, 'newattr')
self.assertEqual(setobject(b'newattr', NULL), 0)
finally:
with contextlib.suppress(AttributeError):
del sys.newattr
try:
self.assertEqual(setobject('\U0001f40d'.encode(), value), 0)
self.assertIs(getattr(sys, '\U0001f40d'), value)
self.assertEqual(setobject('\U0001f40d'.encode(), NULL), 0)
self.assertNotHasAttr(sys, '\U0001f40d')
finally:
with contextlib.suppress(AttributeError):
delattr(sys, '\U0001f40d')
with self.assertRaises(UnicodeDecodeError):
setobject(b'\xff', value)
# CRASHES setobject(NULL, value)
@support.cpython_only
@unittest.skipIf(_testlimitedcapi is None, 'need _testlimitedcapi module')
def test_sys_getxoptions(self):
# Test PySys_GetXOptions()
getxoptions = _testlimitedcapi.sys_getxoptions
self.assertIs(getxoptions(), sys._xoptions)
xoptions = sys._xoptions
try:
sys._xoptions = 'non-dict'
self.assertEqual(getxoptions(), {})
self.assertIs(getxoptions(), sys._xoptions)
del sys._xoptions
self.assertEqual(getxoptions(), {})
self.assertIs(getxoptions(), sys._xoptions)
finally:
sys._xoptions = xoptions
self.assertIs(getxoptions(), sys._xoptions)
def _test_sys_formatstream(self, funname, streamname):
import_helper.import_module('ctypes')
from ctypes import pythonapi, c_char_p, py_object
func = getattr(pythonapi, funname)
func.argtypes = (c_char_p,)
# Supports plain C types.
with support.captured_output(streamname) as stream:
func(b'Hello, %s!', c_char_p(b'world'))
self.assertEqual(stream.getvalue(), 'Hello, world!')
# Supports Python objects.
with support.captured_output(streamname) as stream:
func(b'Hello, %R!', py_object('world'))
self.assertEqual(stream.getvalue(), "Hello, 'world'!")
# The total length is not limited.
with support.captured_output(streamname) as stream:
func(b'Hello, %s!', c_char_p(b'world'*200))
self.assertEqual(stream.getvalue(), 'Hello, ' + 'world'*200 + '!')
def test_sys_formatstdout(self):
# Test PySys_FormatStdout()
self._test_sys_formatstream('PySys_FormatStdout', 'stdout')
def test_sys_formatstderr(self):
# Test PySys_FormatStderr()
self._test_sys_formatstream('PySys_FormatStderr', 'stderr')
def _test_sys_writestream(self, funname, streamname):
import_helper.import_module('ctypes')
from ctypes import pythonapi, c_char_p
func = getattr(pythonapi, funname)
func.argtypes = (c_char_p,)
# Supports plain C types.
with support.captured_output(streamname) as stream:
func(b'Hello, %s!', c_char_p(b'world'))
self.assertEqual(stream.getvalue(), 'Hello, world!')
# There is a limit on the total length.
with support.captured_output(streamname) as stream:
func(b'Hello, %s!', c_char_p(b'world'*100))
self.assertEqual(stream.getvalue(), 'Hello, ' + 'world'*100 + '!')
with support.captured_output(streamname) as stream:
func(b'Hello, %s!', c_char_p(b'world'*200))
out = stream.getvalue()
self.assertEqual(out[:20], 'Hello, worldworldwor')
self.assertEqual(out[-13:], '... truncated')
self.assertGreater(len(out), 1000)
def test_sys_writestdout(self):
# Test PySys_WriteStdout()
self._test_sys_writestream('PySys_WriteStdout', 'stdout')
def test_sys_writestderr(self):
# Test PySys_WriteStderr()
self._test_sys_writestream('PySys_WriteStderr', 'stderr')
if __name__ == "__main__":
unittest.main()
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