mirror of https://github.com/python/cpython
470 lines
19 KiB
Python
470 lines
19 KiB
Python
import errno
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import os
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import re
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import sys
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import unittest
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from test import support
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from test.support import import_helper
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from test.support.os_helper import TESTFN, TESTFN_UNDECODABLE
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from test.support.script_helper import assert_python_failure
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from test.support.testcase import ExceptionIsLikeMixin
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from .test_misc import decode_stderr
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# Skip this test if the _testcapi module isn't available.
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_testcapi = import_helper.import_module('_testcapi')
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NULL = None
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class CustomError(Exception):
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pass
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class Test_Exceptions(unittest.TestCase):
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def test_exception(self):
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raised_exception = ValueError("5")
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new_exc = TypeError("TEST")
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try:
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raise raised_exception
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except ValueError as e:
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orig_sys_exception = sys.exception()
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orig_exception = _testcapi.set_exception(new_exc)
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new_sys_exception = sys.exception()
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new_exception = _testcapi.set_exception(orig_exception)
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reset_sys_exception = sys.exception()
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self.assertEqual(orig_exception, e)
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self.assertEqual(orig_exception, raised_exception)
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self.assertEqual(orig_sys_exception, orig_exception)
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self.assertEqual(reset_sys_exception, orig_exception)
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self.assertEqual(new_exception, new_exc)
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self.assertEqual(new_sys_exception, new_exception)
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else:
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self.fail("Exception not raised")
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def test_exc_info(self):
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raised_exception = ValueError("5")
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new_exc = TypeError("TEST")
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try:
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raise raised_exception
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except ValueError as e:
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tb = e.__traceback__
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orig_sys_exc_info = sys.exc_info()
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orig_exc_info = _testcapi.set_exc_info(new_exc.__class__, new_exc, None)
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new_sys_exc_info = sys.exc_info()
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new_exc_info = _testcapi.set_exc_info(*orig_exc_info)
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reset_sys_exc_info = sys.exc_info()
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self.assertEqual(orig_exc_info[1], e)
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self.assertSequenceEqual(orig_exc_info, (raised_exception.__class__, raised_exception, tb))
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self.assertSequenceEqual(orig_sys_exc_info, orig_exc_info)
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self.assertSequenceEqual(reset_sys_exc_info, orig_exc_info)
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self.assertSequenceEqual(new_exc_info, (new_exc.__class__, new_exc, None))
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self.assertSequenceEqual(new_sys_exc_info, new_exc_info)
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else:
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self.assertTrue(False)
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class Test_FatalError(unittest.TestCase):
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def check_fatal_error(self, code, expected, not_expected=()):
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with support.SuppressCrashReport():
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rc, out, err = assert_python_failure('-sSI', '-c', code)
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err = decode_stderr(err)
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self.assertIn('Fatal Python error: _testcapi_fatal_error_impl: MESSAGE\n',
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err)
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match = re.search(r'^Extension modules:(.*) \(total: ([0-9]+)\)$',
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err, re.MULTILINE)
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if not match:
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self.fail(f"Cannot find 'Extension modules:' in {err!r}")
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modules = set(match.group(1).strip().split(', '))
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total = int(match.group(2))
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for name in expected:
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self.assertIn(name, modules)
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for name in not_expected:
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self.assertNotIn(name, modules)
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self.assertEqual(len(modules), total)
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@support.requires_subprocess()
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def test_fatal_error(self):
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# By default, stdlib extension modules are ignored,
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# but not test modules.
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expected = ('_testcapi',)
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not_expected = ('sys',)
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code = 'import _testcapi, sys; _testcapi.fatal_error(b"MESSAGE")'
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self.check_fatal_error(code, expected, not_expected)
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# Mark _testcapi as stdlib module, but not sys
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expected = ('sys',)
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not_expected = ('_testcapi',)
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code = """if True:
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import _testcapi, sys
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sys.stdlib_module_names = frozenset({"_testcapi"})
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_testcapi.fatal_error(b"MESSAGE")
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"""
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self.check_fatal_error(code, expected)
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class Test_ErrSetAndRestore(unittest.TestCase):
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def test_err_set_raised(self):
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with self.assertRaises(ValueError):
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_testcapi.err_set_raised(ValueError())
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v = ValueError()
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try:
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_testcapi.err_set_raised(v)
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except ValueError as ex:
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self.assertIs(v, ex)
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def test_err_restore(self):
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with self.assertRaises(ValueError):
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_testcapi.err_restore(ValueError)
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with self.assertRaises(ValueError):
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_testcapi.err_restore(ValueError, 1)
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with self.assertRaises(ValueError):
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_testcapi.err_restore(ValueError, 1, None)
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with self.assertRaises(ValueError):
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_testcapi.err_restore(ValueError, ValueError())
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try:
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_testcapi.err_restore(KeyError, "hi")
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except KeyError as k:
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self.assertEqual("hi", k.args[0])
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try:
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1/0
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except Exception as e:
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tb = e.__traceback__
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with self.assertRaises(ValueError):
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_testcapi.err_restore(ValueError, 1, tb)
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with self.assertRaises(TypeError):
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_testcapi.err_restore(ValueError, 1, 0)
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try:
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_testcapi.err_restore(ValueError, 1, tb)
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except ValueError as v:
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self.assertEqual(1, v.args[0])
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self.assertIs(tb, v.__traceback__.tb_next)
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def test_set_object(self):
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# new exception as obj is not an exception
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with self.assertRaises(ValueError) as e:
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_testcapi.exc_set_object(ValueError, 42)
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self.assertEqual(e.exception.args, (42,))
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# wraps the exception because unrelated types
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with self.assertRaises(ValueError) as e:
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_testcapi.exc_set_object(ValueError, TypeError(1,2,3))
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wrapped = e.exception.args[0]
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self.assertIsInstance(wrapped, TypeError)
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self.assertEqual(wrapped.args, (1, 2, 3))
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# is superclass, so does not wrap
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with self.assertRaises(PermissionError) as e:
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_testcapi.exc_set_object(OSError, PermissionError(24))
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self.assertEqual(e.exception.args, (24,))
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class Meta(type):
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def __subclasscheck__(cls, sub):
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1/0
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class Broken(Exception, metaclass=Meta):
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pass
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with self.assertRaises(ZeroDivisionError) as e:
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_testcapi.exc_set_object(Broken, Broken())
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def test_set_object_and_fetch(self):
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class Broken(Exception):
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def __init__(self, *arg):
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raise ValueError("Broken __init__")
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exc = _testcapi.exc_set_object_fetch(Broken, 'abcd')
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self.assertIsInstance(exc, ValueError)
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self.assertEqual(exc.__notes__[0],
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"Normalization failed: type=Broken args='abcd'")
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class BadArg:
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def __repr__(self):
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raise TypeError('Broken arg type')
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exc = _testcapi.exc_set_object_fetch(Broken, BadArg())
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self.assertIsInstance(exc, ValueError)
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self.assertEqual(exc.__notes__[0],
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'Normalization failed: type=Broken args=<unknown>')
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def test_set_string(self):
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"""Test PyErr_SetString()"""
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setstring = _testcapi.err_setstring
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with self.assertRaises(ZeroDivisionError) as e:
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setstring(ZeroDivisionError, b'error')
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self.assertEqual(e.exception.args, ('error',))
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with self.assertRaises(ZeroDivisionError) as e:
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setstring(ZeroDivisionError, 'помилка'.encode())
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self.assertEqual(e.exception.args, ('помилка',))
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with self.assertRaises(UnicodeDecodeError):
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setstring(ZeroDivisionError, b'\xff')
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self.assertRaises(SystemError, setstring, list, b'error')
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# CRASHES setstring(ZeroDivisionError, NULL)
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# CRASHES setstring(NULL, b'error')
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def test_format(self):
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"""Test PyErr_Format()"""
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import_helper.import_module('ctypes')
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from ctypes import pythonapi, py_object, c_char_p, c_int
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name = "PyErr_Format"
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PyErr_Format = getattr(pythonapi, name)
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PyErr_Format.argtypes = (py_object, c_char_p,)
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PyErr_Format.restype = py_object
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with self.assertRaises(ZeroDivisionError) as e:
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PyErr_Format(ZeroDivisionError, b'%s %d', b'error', c_int(42))
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self.assertEqual(e.exception.args, ('error 42',))
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with self.assertRaises(ZeroDivisionError) as e:
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PyErr_Format(ZeroDivisionError, b'%s', 'помилка'.encode())
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self.assertEqual(e.exception.args, ('помилка',))
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with self.assertRaisesRegex(OverflowError, 'not in range'):
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PyErr_Format(ZeroDivisionError, b'%c', c_int(-1))
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with self.assertRaisesRegex(ValueError, 'format string'):
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PyErr_Format(ZeroDivisionError, b'\xff')
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self.assertRaises(SystemError, PyErr_Format, list, b'error')
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# CRASHES PyErr_Format(ZeroDivisionError, NULL)
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# CRASHES PyErr_Format(py_object(), b'error')
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def test_setfromerrnowithfilename(self):
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"""Test PyErr_SetFromErrnoWithFilename()"""
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setfromerrnowithfilename = _testcapi.err_setfromerrnowithfilename
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ENOENT = errno.ENOENT
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with self.assertRaises(FileNotFoundError) as e:
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setfromerrnowithfilename(ENOENT, OSError, b'file')
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self.assertEqual(e.exception.args,
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(ENOENT, 'No such file or directory'))
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self.assertEqual(e.exception.errno, ENOENT)
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self.assertEqual(e.exception.filename, 'file')
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with self.assertRaises(FileNotFoundError) as e:
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setfromerrnowithfilename(ENOENT, OSError, os.fsencode(TESTFN))
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self.assertEqual(e.exception.filename, TESTFN)
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if TESTFN_UNDECODABLE:
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with self.assertRaises(FileNotFoundError) as e:
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setfromerrnowithfilename(ENOENT, OSError, TESTFN_UNDECODABLE)
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self.assertEqual(e.exception.filename,
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os.fsdecode(TESTFN_UNDECODABLE))
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with self.assertRaises(FileNotFoundError) as e:
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setfromerrnowithfilename(ENOENT, OSError, NULL)
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self.assertIsNone(e.exception.filename)
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with self.assertRaises(OSError) as e:
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setfromerrnowithfilename(0, OSError, b'file')
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self.assertEqual(e.exception.args, (0, 'Error'))
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self.assertEqual(e.exception.errno, 0)
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self.assertEqual(e.exception.filename, 'file')
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with self.assertRaises(ZeroDivisionError) as e:
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setfromerrnowithfilename(ENOENT, ZeroDivisionError, b'file')
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self.assertEqual(e.exception.args,
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(ENOENT, 'No such file or directory', 'file'))
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# CRASHES setfromerrnowithfilename(ENOENT, NULL, b'error')
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def test_err_writeunraisable(self):
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# Test PyErr_WriteUnraisable()
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writeunraisable = _testcapi.err_writeunraisable
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firstline = self.test_err_writeunraisable.__code__.co_firstlineno
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with support.catch_unraisable_exception() as cm:
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writeunraisable(CustomError('oops!'), hex)
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self.assertEqual(cm.unraisable.exc_type, CustomError)
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self.assertEqual(str(cm.unraisable.exc_value), 'oops!')
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self.assertEqual(cm.unraisable.exc_traceback.tb_lineno,
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firstline + 6)
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self.assertIsNone(cm.unraisable.err_msg)
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self.assertEqual(cm.unraisable.object, hex)
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with support.catch_unraisable_exception() as cm:
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writeunraisable(CustomError('oops!'), NULL)
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self.assertEqual(cm.unraisable.exc_type, CustomError)
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self.assertEqual(str(cm.unraisable.exc_value), 'oops!')
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self.assertEqual(cm.unraisable.exc_traceback.tb_lineno,
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firstline + 15)
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self.assertIsNone(cm.unraisable.err_msg)
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self.assertIsNone(cm.unraisable.object)
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with (support.swap_attr(sys, 'unraisablehook', None),
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support.captured_stderr() as stderr):
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writeunraisable(CustomError('oops!'), hex)
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lines = stderr.getvalue().splitlines()
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self.assertEqual(lines[0], f'Exception ignored in: {hex!r}')
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self.assertEqual(lines[1], 'Traceback (most recent call last):')
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self.assertEqual(lines[-1], f'{__name__}.CustomError: oops!')
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with (support.swap_attr(sys, 'unraisablehook', None),
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support.captured_stderr() as stderr):
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writeunraisable(CustomError('oops!'), NULL)
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lines = stderr.getvalue().splitlines()
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self.assertEqual(lines[0], 'Traceback (most recent call last):')
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self.assertEqual(lines[-1], f'{__name__}.CustomError: oops!')
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# CRASHES writeunraisable(NULL, hex)
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# CRASHES writeunraisable(NULL, NULL)
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def test_err_formatunraisable(self):
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# Test PyErr_FormatUnraisable()
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formatunraisable = _testcapi.err_formatunraisable
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firstline = self.test_err_formatunraisable.__code__.co_firstlineno
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with support.catch_unraisable_exception() as cm:
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formatunraisable(CustomError('oops!'), b'Error in %R', [])
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self.assertEqual(cm.unraisable.exc_type, CustomError)
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self.assertEqual(str(cm.unraisable.exc_value), 'oops!')
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self.assertEqual(cm.unraisable.exc_traceback.tb_lineno,
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firstline + 6)
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self.assertEqual(cm.unraisable.err_msg, 'Error in []')
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self.assertIsNone(cm.unraisable.object)
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with support.catch_unraisable_exception() as cm:
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formatunraisable(CustomError('oops!'), b'undecodable \xff')
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self.assertEqual(cm.unraisable.exc_type, CustomError)
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self.assertEqual(str(cm.unraisable.exc_value), 'oops!')
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self.assertEqual(cm.unraisable.exc_traceback.tb_lineno,
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firstline + 15)
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self.assertIsNone(cm.unraisable.err_msg)
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self.assertIsNone(cm.unraisable.object)
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with support.catch_unraisable_exception() as cm:
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formatunraisable(CustomError('oops!'), NULL)
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self.assertEqual(cm.unraisable.exc_type, CustomError)
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self.assertEqual(str(cm.unraisable.exc_value), 'oops!')
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self.assertEqual(cm.unraisable.exc_traceback.tb_lineno,
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firstline + 24)
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self.assertIsNone(cm.unraisable.err_msg)
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self.assertIsNone(cm.unraisable.object)
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with (support.swap_attr(sys, 'unraisablehook', None),
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support.captured_stderr() as stderr):
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formatunraisable(CustomError('oops!'), b'Error in %R', [])
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lines = stderr.getvalue().splitlines()
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self.assertEqual(lines[0], f'Error in []:')
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self.assertEqual(lines[1], 'Traceback (most recent call last):')
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self.assertEqual(lines[-1], f'{__name__}.CustomError: oops!')
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with (support.swap_attr(sys, 'unraisablehook', None),
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support.captured_stderr() as stderr):
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formatunraisable(CustomError('oops!'), b'undecodable \xff')
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lines = stderr.getvalue().splitlines()
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self.assertEqual(lines[0], 'Traceback (most recent call last):')
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self.assertEqual(lines[-1], f'{__name__}.CustomError: oops!')
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with (support.swap_attr(sys, 'unraisablehook', None),
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support.captured_stderr() as stderr):
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formatunraisable(CustomError('oops!'), NULL)
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lines = stderr.getvalue().splitlines()
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self.assertEqual(lines[0], 'Traceback (most recent call last):')
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self.assertEqual(lines[-1], f'{__name__}.CustomError: oops!')
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# CRASHES formatunraisable(NULL, b'Error in %R', [])
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# CRASHES formatunraisable(NULL, NULL)
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class Test_PyUnstable_Exc_PrepReraiseStar(ExceptionIsLikeMixin, unittest.TestCase):
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def setUp(self):
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super().setUp()
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try:
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raise ExceptionGroup("eg", [TypeError('bad type'), ValueError(42)])
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except ExceptionGroup as e:
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self.orig = e
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def test_invalid_args(self):
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with self.assertRaisesRegex(TypeError, "orig must be an exception"):
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_testcapi.unstable_exc_prep_reraise_star(42, [None])
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with self.assertRaisesRegex(TypeError, "excs must be a list"):
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_testcapi.unstable_exc_prep_reraise_star(self.orig, 42)
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with self.assertRaisesRegex(TypeError, "not an exception"):
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_testcapi.unstable_exc_prep_reraise_star(self.orig, [TypeError(42), 42])
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with self.assertRaisesRegex(ValueError, "orig must be a raised exception"):
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_testcapi.unstable_exc_prep_reraise_star(ValueError(42), [TypeError(42)])
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with self.assertRaisesRegex(ValueError, "orig must be a raised exception"):
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_testcapi.unstable_exc_prep_reraise_star(ExceptionGroup("eg", [ValueError(42)]),
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[TypeError(42)])
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def test_nothing_to_reraise(self):
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self.assertEqual(
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_testcapi.unstable_exc_prep_reraise_star(self.orig, [None]), None)
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try:
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raise ValueError(42)
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except ValueError as e:
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orig = e
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self.assertEqual(
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_testcapi.unstable_exc_prep_reraise_star(orig, [None]), None)
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def test_reraise_orig(self):
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orig = self.orig
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res = _testcapi.unstable_exc_prep_reraise_star(orig, [orig])
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self.assertExceptionIsLike(res, orig)
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def test_raise_orig_parts(self):
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orig = self.orig
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match, rest = orig.split(TypeError)
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test_cases = [
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([match, rest], orig),
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([rest, match], orig),
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([match], match),
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([rest], rest),
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([], None),
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]
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for input, expected in test_cases:
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with self.subTest(input=input):
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res = _testcapi.unstable_exc_prep_reraise_star(orig, input)
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self.assertExceptionIsLike(res, expected)
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def test_raise_with_new_exceptions(self):
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orig = self.orig
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match, rest = orig.split(TypeError)
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new1 = OSError('bad file')
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new2 = RuntimeError('bad runtime')
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test_cases = [
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([new1, match, rest], ExceptionGroup("", [new1, orig])),
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([match, new1, rest], ExceptionGroup("", [new1, orig])),
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([match, rest, new1], ExceptionGroup("", [new1, orig])),
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([new1, new2, match, rest], ExceptionGroup("", [new1, new2, orig])),
|
|
([new1, match, new2, rest], ExceptionGroup("", [new1, new2, orig])),
|
|
([new2, rest, match, new1], ExceptionGroup("", [new2, new1, orig])),
|
|
([rest, new2, match, new1], ExceptionGroup("", [new2, new1, orig])),
|
|
|
|
|
|
([new1, new2, rest], ExceptionGroup("", [new1, new2, rest])),
|
|
([new1, match, new2], ExceptionGroup("", [new1, new2, match])),
|
|
([rest, new2, new1], ExceptionGroup("", [new2, new1, rest])),
|
|
([new1, new2], ExceptionGroup("", [new1, new2])),
|
|
([new2, new1], ExceptionGroup("", [new2, new1])),
|
|
]
|
|
|
|
for (input, expected) in test_cases:
|
|
with self.subTest(input=input):
|
|
res = _testcapi.unstable_exc_prep_reraise_star(orig, input)
|
|
self.assertExceptionIsLike(res, expected)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|