mirror of
https://github.com/python/cpython.git
synced 2025-07-08 03:45:36 +00:00
5487c13e44
This restores details lost in revision 097f4fda61a4 (since Python 3.3, related to the new OSError subclasses). Further additions: * Markup for attributes and constructor signature * Explain "winerror" and "filename2" * Extend test to check for filename2 defaulting to None * Clarify that the constructor can return a subclass I have intentionally left out any details of allowing more than five arguments, or how the "args" attribute is set for four or more arguments. These details seem to be dependent on the Python version and platform.
1041 lines
36 KiB
Python
1041 lines
36 KiB
Python
# Python test set -- part 5, built-in exceptions
|
|
|
|
import os
|
|
import sys
|
|
import unittest
|
|
import pickle
|
|
import weakref
|
|
import errno
|
|
|
|
from test.support import (TESTFN, captured_output, check_impl_detail,
|
|
check_warnings, cpython_only, gc_collect, run_unittest,
|
|
no_tracing, unlink, import_module)
|
|
|
|
class NaiveException(Exception):
|
|
def __init__(self, x):
|
|
self.x = x
|
|
|
|
class SlottedNaiveException(Exception):
|
|
__slots__ = ('x',)
|
|
def __init__(self, x):
|
|
self.x = x
|
|
|
|
# XXX This is not really enough, each *operation* should be tested!
|
|
|
|
class ExceptionTests(unittest.TestCase):
|
|
|
|
def raise_catch(self, exc, excname):
|
|
try:
|
|
raise exc("spam")
|
|
except exc as err:
|
|
buf1 = str(err)
|
|
try:
|
|
raise exc("spam")
|
|
except exc as err:
|
|
buf2 = str(err)
|
|
self.assertEqual(buf1, buf2)
|
|
self.assertEqual(exc.__name__, excname)
|
|
|
|
def testRaising(self):
|
|
self.raise_catch(AttributeError, "AttributeError")
|
|
self.assertRaises(AttributeError, getattr, sys, "undefined_attribute")
|
|
|
|
self.raise_catch(EOFError, "EOFError")
|
|
fp = open(TESTFN, 'w')
|
|
fp.close()
|
|
fp = open(TESTFN, 'r')
|
|
savestdin = sys.stdin
|
|
try:
|
|
try:
|
|
import marshal
|
|
marshal.loads(b'')
|
|
except EOFError:
|
|
pass
|
|
finally:
|
|
sys.stdin = savestdin
|
|
fp.close()
|
|
unlink(TESTFN)
|
|
|
|
self.raise_catch(OSError, "OSError")
|
|
self.assertRaises(OSError, open, 'this file does not exist', 'r')
|
|
|
|
self.raise_catch(ImportError, "ImportError")
|
|
self.assertRaises(ImportError, __import__, "undefined_module")
|
|
|
|
self.raise_catch(IndexError, "IndexError")
|
|
x = []
|
|
self.assertRaises(IndexError, x.__getitem__, 10)
|
|
|
|
self.raise_catch(KeyError, "KeyError")
|
|
x = {}
|
|
self.assertRaises(KeyError, x.__getitem__, 'key')
|
|
|
|
self.raise_catch(KeyboardInterrupt, "KeyboardInterrupt")
|
|
|
|
self.raise_catch(MemoryError, "MemoryError")
|
|
|
|
self.raise_catch(NameError, "NameError")
|
|
try: x = undefined_variable
|
|
except NameError: pass
|
|
|
|
self.raise_catch(OverflowError, "OverflowError")
|
|
x = 1
|
|
for dummy in range(128):
|
|
x += x # this simply shouldn't blow up
|
|
|
|
self.raise_catch(RuntimeError, "RuntimeError")
|
|
|
|
self.raise_catch(SyntaxError, "SyntaxError")
|
|
try: exec('/\n')
|
|
except SyntaxError: pass
|
|
|
|
self.raise_catch(IndentationError, "IndentationError")
|
|
|
|
self.raise_catch(TabError, "TabError")
|
|
try: compile("try:\n\t1/0\n \t1/0\nfinally:\n pass\n",
|
|
'<string>', 'exec')
|
|
except TabError: pass
|
|
else: self.fail("TabError not raised")
|
|
|
|
self.raise_catch(SystemError, "SystemError")
|
|
|
|
self.raise_catch(SystemExit, "SystemExit")
|
|
self.assertRaises(SystemExit, sys.exit, 0)
|
|
|
|
self.raise_catch(TypeError, "TypeError")
|
|
try: [] + ()
|
|
except TypeError: pass
|
|
|
|
self.raise_catch(ValueError, "ValueError")
|
|
self.assertRaises(ValueError, chr, 17<<16)
|
|
|
|
self.raise_catch(ZeroDivisionError, "ZeroDivisionError")
|
|
try: x = 1/0
|
|
except ZeroDivisionError: pass
|
|
|
|
self.raise_catch(Exception, "Exception")
|
|
try: x = 1/0
|
|
except Exception as e: pass
|
|
|
|
def testSyntaxErrorMessage(self):
|
|
# make sure the right exception message is raised for each of
|
|
# these code fragments
|
|
|
|
def ckmsg(src, msg):
|
|
try:
|
|
compile(src, '<fragment>', 'exec')
|
|
except SyntaxError as e:
|
|
if e.msg != msg:
|
|
self.fail("expected %s, got %s" % (msg, e.msg))
|
|
else:
|
|
self.fail("failed to get expected SyntaxError")
|
|
|
|
s = '''while 1:
|
|
try:
|
|
pass
|
|
finally:
|
|
continue'''
|
|
|
|
if not sys.platform.startswith('java'):
|
|
ckmsg(s, "'continue' not supported inside 'finally' clause")
|
|
|
|
s = '''if 1:
|
|
try:
|
|
continue
|
|
except:
|
|
pass'''
|
|
|
|
ckmsg(s, "'continue' not properly in loop")
|
|
ckmsg("continue\n", "'continue' not properly in loop")
|
|
|
|
def testSyntaxErrorOffset(self):
|
|
def check(src, lineno, offset):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
compile(src, '<fragment>', 'exec')
|
|
self.assertEqual(cm.exception.lineno, lineno)
|
|
self.assertEqual(cm.exception.offset, offset)
|
|
|
|
check('def fact(x):\n\treturn x!\n', 2, 10)
|
|
check('1 +\n', 1, 4)
|
|
check('def spam():\n print(1)\n print(2)', 3, 10)
|
|
check('Python = "Python" +', 1, 20)
|
|
check('Python = "\u1e54\xfd\u0163\u0125\xf2\xf1" +', 1, 20)
|
|
|
|
@cpython_only
|
|
def testSettingException(self):
|
|
# test that setting an exception at the C level works even if the
|
|
# exception object can't be constructed.
|
|
|
|
class BadException(Exception):
|
|
def __init__(self_):
|
|
raise RuntimeError("can't instantiate BadException")
|
|
|
|
class InvalidException:
|
|
pass
|
|
|
|
def test_capi1():
|
|
import _testcapi
|
|
try:
|
|
_testcapi.raise_exception(BadException, 1)
|
|
except TypeError as err:
|
|
exc, err, tb = sys.exc_info()
|
|
co = tb.tb_frame.f_code
|
|
self.assertEqual(co.co_name, "test_capi1")
|
|
self.assertTrue(co.co_filename.endswith('test_exceptions.py'))
|
|
else:
|
|
self.fail("Expected exception")
|
|
|
|
def test_capi2():
|
|
import _testcapi
|
|
try:
|
|
_testcapi.raise_exception(BadException, 0)
|
|
except RuntimeError as err:
|
|
exc, err, tb = sys.exc_info()
|
|
co = tb.tb_frame.f_code
|
|
self.assertEqual(co.co_name, "__init__")
|
|
self.assertTrue(co.co_filename.endswith('test_exceptions.py'))
|
|
co2 = tb.tb_frame.f_back.f_code
|
|
self.assertEqual(co2.co_name, "test_capi2")
|
|
else:
|
|
self.fail("Expected exception")
|
|
|
|
def test_capi3():
|
|
import _testcapi
|
|
self.assertRaises(SystemError, _testcapi.raise_exception,
|
|
InvalidException, 1)
|
|
|
|
if not sys.platform.startswith('java'):
|
|
test_capi1()
|
|
test_capi2()
|
|
test_capi3()
|
|
|
|
def test_WindowsError(self):
|
|
try:
|
|
WindowsError
|
|
except NameError:
|
|
pass
|
|
else:
|
|
self.assertIs(WindowsError, OSError)
|
|
self.assertEqual(str(OSError(1001)), "1001")
|
|
self.assertEqual(str(OSError(1001, "message")),
|
|
"[Errno 1001] message")
|
|
# POSIX errno (9 aka EBADF) is untranslated
|
|
w = OSError(9, 'foo', 'bar')
|
|
self.assertEqual(w.errno, 9)
|
|
self.assertEqual(w.winerror, None)
|
|
self.assertEqual(str(w), "[Errno 9] foo: 'bar'")
|
|
# ERROR_PATH_NOT_FOUND (win error 3) becomes ENOENT (2)
|
|
w = OSError(0, 'foo', 'bar', 3)
|
|
self.assertEqual(w.errno, 2)
|
|
self.assertEqual(w.winerror, 3)
|
|
self.assertEqual(w.strerror, 'foo')
|
|
self.assertEqual(w.filename, 'bar')
|
|
self.assertEqual(w.filename2, None)
|
|
self.assertEqual(str(w), "[WinError 3] foo: 'bar'")
|
|
# Unknown win error becomes EINVAL (22)
|
|
w = OSError(0, 'foo', None, 1001)
|
|
self.assertEqual(w.errno, 22)
|
|
self.assertEqual(w.winerror, 1001)
|
|
self.assertEqual(w.strerror, 'foo')
|
|
self.assertEqual(w.filename, None)
|
|
self.assertEqual(w.filename2, None)
|
|
self.assertEqual(str(w), "[WinError 1001] foo")
|
|
# Non-numeric "errno"
|
|
w = OSError('bar', 'foo')
|
|
self.assertEqual(w.errno, 'bar')
|
|
self.assertEqual(w.winerror, None)
|
|
self.assertEqual(w.strerror, 'foo')
|
|
self.assertEqual(w.filename, None)
|
|
self.assertEqual(w.filename2, None)
|
|
|
|
@unittest.skipUnless(sys.platform == 'win32',
|
|
'test specific to Windows')
|
|
def test_windows_message(self):
|
|
"""Should fill in unknown error code in Windows error message"""
|
|
ctypes = import_module('ctypes')
|
|
# this error code has no message, Python formats it as hexadecimal
|
|
code = 3765269347
|
|
with self.assertRaisesRegex(OSError, 'Windows Error 0x%x' % code):
|
|
ctypes.pythonapi.PyErr_SetFromWindowsErr(code)
|
|
|
|
def testAttributes(self):
|
|
# test that exception attributes are happy
|
|
|
|
exceptionList = [
|
|
(BaseException, (), {'args' : ()}),
|
|
(BaseException, (1, ), {'args' : (1,)}),
|
|
(BaseException, ('foo',),
|
|
{'args' : ('foo',)}),
|
|
(BaseException, ('foo', 1),
|
|
{'args' : ('foo', 1)}),
|
|
(SystemExit, ('foo',),
|
|
{'args' : ('foo',), 'code' : 'foo'}),
|
|
(OSError, ('foo',),
|
|
{'args' : ('foo',), 'filename' : None, 'filename2' : None,
|
|
'errno' : None, 'strerror' : None}),
|
|
(OSError, ('foo', 'bar'),
|
|
{'args' : ('foo', 'bar'),
|
|
'filename' : None, 'filename2' : None,
|
|
'errno' : 'foo', 'strerror' : 'bar'}),
|
|
(OSError, ('foo', 'bar', 'baz'),
|
|
{'args' : ('foo', 'bar'),
|
|
'filename' : 'baz', 'filename2' : None,
|
|
'errno' : 'foo', 'strerror' : 'bar'}),
|
|
(OSError, ('foo', 'bar', 'baz', None, 'quux'),
|
|
{'args' : ('foo', 'bar'), 'filename' : 'baz', 'filename2': 'quux'}),
|
|
(OSError, ('errnoStr', 'strErrorStr', 'filenameStr'),
|
|
{'args' : ('errnoStr', 'strErrorStr'),
|
|
'strerror' : 'strErrorStr', 'errno' : 'errnoStr',
|
|
'filename' : 'filenameStr'}),
|
|
(OSError, (1, 'strErrorStr', 'filenameStr'),
|
|
{'args' : (1, 'strErrorStr'), 'errno' : 1,
|
|
'strerror' : 'strErrorStr',
|
|
'filename' : 'filenameStr', 'filename2' : None}),
|
|
(SyntaxError, (), {'msg' : None, 'text' : None,
|
|
'filename' : None, 'lineno' : None, 'offset' : None,
|
|
'print_file_and_line' : None}),
|
|
(SyntaxError, ('msgStr',),
|
|
{'args' : ('msgStr',), 'text' : None,
|
|
'print_file_and_line' : None, 'msg' : 'msgStr',
|
|
'filename' : None, 'lineno' : None, 'offset' : None}),
|
|
(SyntaxError, ('msgStr', ('filenameStr', 'linenoStr', 'offsetStr',
|
|
'textStr')),
|
|
{'offset' : 'offsetStr', 'text' : 'textStr',
|
|
'args' : ('msgStr', ('filenameStr', 'linenoStr',
|
|
'offsetStr', 'textStr')),
|
|
'print_file_and_line' : None, 'msg' : 'msgStr',
|
|
'filename' : 'filenameStr', 'lineno' : 'linenoStr'}),
|
|
(SyntaxError, ('msgStr', 'filenameStr', 'linenoStr', 'offsetStr',
|
|
'textStr', 'print_file_and_lineStr'),
|
|
{'text' : None,
|
|
'args' : ('msgStr', 'filenameStr', 'linenoStr', 'offsetStr',
|
|
'textStr', 'print_file_and_lineStr'),
|
|
'print_file_and_line' : None, 'msg' : 'msgStr',
|
|
'filename' : None, 'lineno' : None, 'offset' : None}),
|
|
(UnicodeError, (), {'args' : (),}),
|
|
(UnicodeEncodeError, ('ascii', 'a', 0, 1,
|
|
'ordinal not in range'),
|
|
{'args' : ('ascii', 'a', 0, 1,
|
|
'ordinal not in range'),
|
|
'encoding' : 'ascii', 'object' : 'a',
|
|
'start' : 0, 'reason' : 'ordinal not in range'}),
|
|
(UnicodeDecodeError, ('ascii', bytearray(b'\xff'), 0, 1,
|
|
'ordinal not in range'),
|
|
{'args' : ('ascii', bytearray(b'\xff'), 0, 1,
|
|
'ordinal not in range'),
|
|
'encoding' : 'ascii', 'object' : b'\xff',
|
|
'start' : 0, 'reason' : 'ordinal not in range'}),
|
|
(UnicodeDecodeError, ('ascii', b'\xff', 0, 1,
|
|
'ordinal not in range'),
|
|
{'args' : ('ascii', b'\xff', 0, 1,
|
|
'ordinal not in range'),
|
|
'encoding' : 'ascii', 'object' : b'\xff',
|
|
'start' : 0, 'reason' : 'ordinal not in range'}),
|
|
(UnicodeTranslateError, ("\u3042", 0, 1, "ouch"),
|
|
{'args' : ('\u3042', 0, 1, 'ouch'),
|
|
'object' : '\u3042', 'reason' : 'ouch',
|
|
'start' : 0, 'end' : 1}),
|
|
(NaiveException, ('foo',),
|
|
{'args': ('foo',), 'x': 'foo'}),
|
|
(SlottedNaiveException, ('foo',),
|
|
{'args': ('foo',), 'x': 'foo'}),
|
|
]
|
|
try:
|
|
# More tests are in test_WindowsError
|
|
exceptionList.append(
|
|
(WindowsError, (1, 'strErrorStr', 'filenameStr'),
|
|
{'args' : (1, 'strErrorStr'),
|
|
'strerror' : 'strErrorStr', 'winerror' : None,
|
|
'errno' : 1,
|
|
'filename' : 'filenameStr', 'filename2' : None})
|
|
)
|
|
except NameError:
|
|
pass
|
|
|
|
for exc, args, expected in exceptionList:
|
|
try:
|
|
e = exc(*args)
|
|
except:
|
|
print("\nexc=%r, args=%r" % (exc, args), file=sys.stderr)
|
|
raise
|
|
else:
|
|
# Verify module name
|
|
if not type(e).__name__.endswith('NaiveException'):
|
|
self.assertEqual(type(e).__module__, 'builtins')
|
|
# Verify no ref leaks in Exc_str()
|
|
s = str(e)
|
|
for checkArgName in expected:
|
|
value = getattr(e, checkArgName)
|
|
self.assertEqual(repr(value),
|
|
repr(expected[checkArgName]),
|
|
'%r.%s == %r, expected %r' % (
|
|
e, checkArgName,
|
|
value, expected[checkArgName]))
|
|
|
|
# test for pickling support
|
|
for p in [pickle]:
|
|
for protocol in range(p.HIGHEST_PROTOCOL + 1):
|
|
s = p.dumps(e, protocol)
|
|
new = p.loads(s)
|
|
for checkArgName in expected:
|
|
got = repr(getattr(new, checkArgName))
|
|
want = repr(expected[checkArgName])
|
|
self.assertEqual(got, want,
|
|
'pickled "%r", attribute "%s' %
|
|
(e, checkArgName))
|
|
|
|
def testWithTraceback(self):
|
|
try:
|
|
raise IndexError(4)
|
|
except:
|
|
tb = sys.exc_info()[2]
|
|
|
|
e = BaseException().with_traceback(tb)
|
|
self.assertIsInstance(e, BaseException)
|
|
self.assertEqual(e.__traceback__, tb)
|
|
|
|
e = IndexError(5).with_traceback(tb)
|
|
self.assertIsInstance(e, IndexError)
|
|
self.assertEqual(e.__traceback__, tb)
|
|
|
|
class MyException(Exception):
|
|
pass
|
|
|
|
e = MyException().with_traceback(tb)
|
|
self.assertIsInstance(e, MyException)
|
|
self.assertEqual(e.__traceback__, tb)
|
|
|
|
def testInvalidTraceback(self):
|
|
try:
|
|
Exception().__traceback__ = 5
|
|
except TypeError as e:
|
|
self.assertIn("__traceback__ must be a traceback", str(e))
|
|
else:
|
|
self.fail("No exception raised")
|
|
|
|
def testInvalidAttrs(self):
|
|
self.assertRaises(TypeError, setattr, Exception(), '__cause__', 1)
|
|
self.assertRaises(TypeError, delattr, Exception(), '__cause__')
|
|
self.assertRaises(TypeError, setattr, Exception(), '__context__', 1)
|
|
self.assertRaises(TypeError, delattr, Exception(), '__context__')
|
|
|
|
def testNoneClearsTracebackAttr(self):
|
|
try:
|
|
raise IndexError(4)
|
|
except:
|
|
tb = sys.exc_info()[2]
|
|
|
|
e = Exception()
|
|
e.__traceback__ = tb
|
|
e.__traceback__ = None
|
|
self.assertEqual(e.__traceback__, None)
|
|
|
|
def testChainingAttrs(self):
|
|
e = Exception()
|
|
self.assertIsNone(e.__context__)
|
|
self.assertIsNone(e.__cause__)
|
|
|
|
e = TypeError()
|
|
self.assertIsNone(e.__context__)
|
|
self.assertIsNone(e.__cause__)
|
|
|
|
class MyException(OSError):
|
|
pass
|
|
|
|
e = MyException()
|
|
self.assertIsNone(e.__context__)
|
|
self.assertIsNone(e.__cause__)
|
|
|
|
def testChainingDescriptors(self):
|
|
try:
|
|
raise Exception()
|
|
except Exception as exc:
|
|
e = exc
|
|
|
|
self.assertIsNone(e.__context__)
|
|
self.assertIsNone(e.__cause__)
|
|
self.assertFalse(e.__suppress_context__)
|
|
|
|
e.__context__ = NameError()
|
|
e.__cause__ = None
|
|
self.assertIsInstance(e.__context__, NameError)
|
|
self.assertIsNone(e.__cause__)
|
|
self.assertTrue(e.__suppress_context__)
|
|
e.__suppress_context__ = False
|
|
self.assertFalse(e.__suppress_context__)
|
|
|
|
def testKeywordArgs(self):
|
|
# test that builtin exception don't take keyword args,
|
|
# but user-defined subclasses can if they want
|
|
self.assertRaises(TypeError, BaseException, a=1)
|
|
|
|
class DerivedException(BaseException):
|
|
def __init__(self, fancy_arg):
|
|
BaseException.__init__(self)
|
|
self.fancy_arg = fancy_arg
|
|
|
|
x = DerivedException(fancy_arg=42)
|
|
self.assertEqual(x.fancy_arg, 42)
|
|
|
|
@no_tracing
|
|
def testInfiniteRecursion(self):
|
|
def f():
|
|
return f()
|
|
self.assertRaises(RuntimeError, f)
|
|
|
|
def g():
|
|
try:
|
|
return g()
|
|
except ValueError:
|
|
return -1
|
|
self.assertRaises(RuntimeError, g)
|
|
|
|
def test_str(self):
|
|
# Make sure both instances and classes have a str representation.
|
|
self.assertTrue(str(Exception))
|
|
self.assertTrue(str(Exception('a')))
|
|
self.assertTrue(str(Exception('a', 'b')))
|
|
|
|
def testExceptionCleanupNames(self):
|
|
# Make sure the local variable bound to the exception instance by
|
|
# an "except" statement is only visible inside the except block.
|
|
try:
|
|
raise Exception()
|
|
except Exception as e:
|
|
self.assertTrue(e)
|
|
del e
|
|
self.assertNotIn('e', locals())
|
|
|
|
def testExceptionCleanupState(self):
|
|
# Make sure exception state is cleaned up as soon as the except
|
|
# block is left. See #2507
|
|
|
|
class MyException(Exception):
|
|
def __init__(self, obj):
|
|
self.obj = obj
|
|
class MyObj:
|
|
pass
|
|
|
|
def inner_raising_func():
|
|
# Create some references in exception value and traceback
|
|
local_ref = obj
|
|
raise MyException(obj)
|
|
|
|
# Qualified "except" with "as"
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
try:
|
|
inner_raising_func()
|
|
except MyException as e:
|
|
pass
|
|
obj = None
|
|
obj = wr()
|
|
self.assertTrue(obj is None, "%s" % obj)
|
|
|
|
# Qualified "except" without "as"
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
try:
|
|
inner_raising_func()
|
|
except MyException:
|
|
pass
|
|
obj = None
|
|
obj = wr()
|
|
self.assertTrue(obj is None, "%s" % obj)
|
|
|
|
# Bare "except"
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
try:
|
|
inner_raising_func()
|
|
except:
|
|
pass
|
|
obj = None
|
|
obj = wr()
|
|
self.assertTrue(obj is None, "%s" % obj)
|
|
|
|
# "except" with premature block leave
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
for i in [0]:
|
|
try:
|
|
inner_raising_func()
|
|
except:
|
|
break
|
|
obj = None
|
|
obj = wr()
|
|
self.assertTrue(obj is None, "%s" % obj)
|
|
|
|
# "except" block raising another exception
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
try:
|
|
try:
|
|
inner_raising_func()
|
|
except:
|
|
raise KeyError
|
|
except KeyError as e:
|
|
# We want to test that the except block above got rid of
|
|
# the exception raised in inner_raising_func(), but it
|
|
# also ends up in the __context__ of the KeyError, so we
|
|
# must clear the latter manually for our test to succeed.
|
|
e.__context__ = None
|
|
obj = None
|
|
obj = wr()
|
|
# guarantee no ref cycles on CPython (don't gc_collect)
|
|
if check_impl_detail(cpython=False):
|
|
gc_collect()
|
|
self.assertTrue(obj is None, "%s" % obj)
|
|
|
|
# Some complicated construct
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
try:
|
|
inner_raising_func()
|
|
except MyException:
|
|
try:
|
|
try:
|
|
raise
|
|
finally:
|
|
raise
|
|
except MyException:
|
|
pass
|
|
obj = None
|
|
if check_impl_detail(cpython=False):
|
|
gc_collect()
|
|
obj = wr()
|
|
self.assertTrue(obj is None, "%s" % obj)
|
|
|
|
# Inside an exception-silencing "with" block
|
|
class Context:
|
|
def __enter__(self):
|
|
return self
|
|
def __exit__ (self, exc_type, exc_value, exc_tb):
|
|
return True
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
with Context():
|
|
inner_raising_func()
|
|
obj = None
|
|
if check_impl_detail(cpython=False):
|
|
gc_collect()
|
|
obj = wr()
|
|
self.assertTrue(obj is None, "%s" % obj)
|
|
|
|
def test_exception_target_in_nested_scope(self):
|
|
# issue 4617: This used to raise a SyntaxError
|
|
# "can not delete variable 'e' referenced in nested scope"
|
|
def print_error():
|
|
e
|
|
try:
|
|
something
|
|
except Exception as e:
|
|
print_error()
|
|
# implicit "del e" here
|
|
|
|
def test_generator_leaking(self):
|
|
# Test that generator exception state doesn't leak into the calling
|
|
# frame
|
|
def yield_raise():
|
|
try:
|
|
raise KeyError("caught")
|
|
except KeyError:
|
|
yield sys.exc_info()[0]
|
|
yield sys.exc_info()[0]
|
|
yield sys.exc_info()[0]
|
|
g = yield_raise()
|
|
self.assertEqual(next(g), KeyError)
|
|
self.assertEqual(sys.exc_info()[0], None)
|
|
self.assertEqual(next(g), KeyError)
|
|
self.assertEqual(sys.exc_info()[0], None)
|
|
self.assertEqual(next(g), None)
|
|
|
|
# Same test, but inside an exception handler
|
|
try:
|
|
raise TypeError("foo")
|
|
except TypeError:
|
|
g = yield_raise()
|
|
self.assertEqual(next(g), KeyError)
|
|
self.assertEqual(sys.exc_info()[0], TypeError)
|
|
self.assertEqual(next(g), KeyError)
|
|
self.assertEqual(sys.exc_info()[0], TypeError)
|
|
self.assertEqual(next(g), TypeError)
|
|
del g
|
|
self.assertEqual(sys.exc_info()[0], TypeError)
|
|
|
|
def test_generator_leaking2(self):
|
|
# See issue 12475.
|
|
def g():
|
|
yield
|
|
try:
|
|
raise RuntimeError
|
|
except RuntimeError:
|
|
it = g()
|
|
next(it)
|
|
try:
|
|
next(it)
|
|
except StopIteration:
|
|
pass
|
|
self.assertEqual(sys.exc_info(), (None, None, None))
|
|
|
|
def test_generator_leaking3(self):
|
|
# See issue #23353. When gen.throw() is called, the caller's
|
|
# exception state should be save and restored.
|
|
def g():
|
|
try:
|
|
yield
|
|
except ZeroDivisionError:
|
|
yield sys.exc_info()[1]
|
|
it = g()
|
|
next(it)
|
|
try:
|
|
1/0
|
|
except ZeroDivisionError as e:
|
|
self.assertIs(sys.exc_info()[1], e)
|
|
gen_exc = it.throw(e)
|
|
self.assertIs(sys.exc_info()[1], e)
|
|
self.assertIs(gen_exc, e)
|
|
self.assertEqual(sys.exc_info(), (None, None, None))
|
|
|
|
def test_generator_leaking4(self):
|
|
# See issue #23353. When an exception is raised by a generator,
|
|
# the caller's exception state should still be restored.
|
|
def g():
|
|
try:
|
|
1/0
|
|
except ZeroDivisionError:
|
|
yield sys.exc_info()[0]
|
|
raise
|
|
it = g()
|
|
try:
|
|
raise TypeError
|
|
except TypeError:
|
|
# The caller's exception state (TypeError) is temporarily
|
|
# saved in the generator.
|
|
tp = next(it)
|
|
self.assertIs(tp, ZeroDivisionError)
|
|
try:
|
|
next(it)
|
|
# We can't check it immediately, but while next() returns
|
|
# with an exception, it shouldn't have restored the old
|
|
# exception state (TypeError).
|
|
except ZeroDivisionError as e:
|
|
self.assertIs(sys.exc_info()[1], e)
|
|
# We used to find TypeError here.
|
|
self.assertEqual(sys.exc_info(), (None, None, None))
|
|
|
|
def test_generator_doesnt_retain_old_exc(self):
|
|
def g():
|
|
self.assertIsInstance(sys.exc_info()[1], RuntimeError)
|
|
yield
|
|
self.assertEqual(sys.exc_info(), (None, None, None))
|
|
it = g()
|
|
try:
|
|
raise RuntimeError
|
|
except RuntimeError:
|
|
next(it)
|
|
self.assertRaises(StopIteration, next, it)
|
|
|
|
def test_generator_finalizing_and_exc_info(self):
|
|
# See #7173
|
|
def simple_gen():
|
|
yield 1
|
|
def run_gen():
|
|
gen = simple_gen()
|
|
try:
|
|
raise RuntimeError
|
|
except RuntimeError:
|
|
return next(gen)
|
|
run_gen()
|
|
gc_collect()
|
|
self.assertEqual(sys.exc_info(), (None, None, None))
|
|
|
|
def _check_generator_cleanup_exc_state(self, testfunc):
|
|
# Issue #12791: exception state is cleaned up as soon as a generator
|
|
# is closed (reference cycles are broken).
|
|
class MyException(Exception):
|
|
def __init__(self, obj):
|
|
self.obj = obj
|
|
class MyObj:
|
|
pass
|
|
|
|
def raising_gen():
|
|
try:
|
|
raise MyException(obj)
|
|
except MyException:
|
|
yield
|
|
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
g = raising_gen()
|
|
next(g)
|
|
testfunc(g)
|
|
g = obj = None
|
|
obj = wr()
|
|
self.assertIs(obj, None)
|
|
|
|
def test_generator_throw_cleanup_exc_state(self):
|
|
def do_throw(g):
|
|
try:
|
|
g.throw(RuntimeError())
|
|
except RuntimeError:
|
|
pass
|
|
self._check_generator_cleanup_exc_state(do_throw)
|
|
|
|
def test_generator_close_cleanup_exc_state(self):
|
|
def do_close(g):
|
|
g.close()
|
|
self._check_generator_cleanup_exc_state(do_close)
|
|
|
|
def test_generator_del_cleanup_exc_state(self):
|
|
def do_del(g):
|
|
g = None
|
|
self._check_generator_cleanup_exc_state(do_del)
|
|
|
|
def test_generator_next_cleanup_exc_state(self):
|
|
def do_next(g):
|
|
try:
|
|
next(g)
|
|
except StopIteration:
|
|
pass
|
|
else:
|
|
self.fail("should have raised StopIteration")
|
|
self._check_generator_cleanup_exc_state(do_next)
|
|
|
|
def test_generator_send_cleanup_exc_state(self):
|
|
def do_send(g):
|
|
try:
|
|
g.send(None)
|
|
except StopIteration:
|
|
pass
|
|
else:
|
|
self.fail("should have raised StopIteration")
|
|
self._check_generator_cleanup_exc_state(do_send)
|
|
|
|
def test_3114(self):
|
|
# Bug #3114: in its destructor, MyObject retrieves a pointer to
|
|
# obsolete and/or deallocated objects.
|
|
class MyObject:
|
|
def __del__(self):
|
|
nonlocal e
|
|
e = sys.exc_info()
|
|
e = ()
|
|
try:
|
|
raise Exception(MyObject())
|
|
except:
|
|
pass
|
|
self.assertEqual(e, (None, None, None))
|
|
|
|
def test_unicode_change_attributes(self):
|
|
# See issue 7309. This was a crasher.
|
|
|
|
u = UnicodeEncodeError('baz', 'xxxxx', 1, 5, 'foo')
|
|
self.assertEqual(str(u), "'baz' codec can't encode characters in position 1-4: foo")
|
|
u.end = 2
|
|
self.assertEqual(str(u), "'baz' codec can't encode character '\\x78' in position 1: foo")
|
|
u.end = 5
|
|
u.reason = 0x345345345345345345
|
|
self.assertEqual(str(u), "'baz' codec can't encode characters in position 1-4: 965230951443685724997")
|
|
u.encoding = 4000
|
|
self.assertEqual(str(u), "'4000' codec can't encode characters in position 1-4: 965230951443685724997")
|
|
u.start = 1000
|
|
self.assertEqual(str(u), "'4000' codec can't encode characters in position 1000-4: 965230951443685724997")
|
|
|
|
u = UnicodeDecodeError('baz', b'xxxxx', 1, 5, 'foo')
|
|
self.assertEqual(str(u), "'baz' codec can't decode bytes in position 1-4: foo")
|
|
u.end = 2
|
|
self.assertEqual(str(u), "'baz' codec can't decode byte 0x78 in position 1: foo")
|
|
u.end = 5
|
|
u.reason = 0x345345345345345345
|
|
self.assertEqual(str(u), "'baz' codec can't decode bytes in position 1-4: 965230951443685724997")
|
|
u.encoding = 4000
|
|
self.assertEqual(str(u), "'4000' codec can't decode bytes in position 1-4: 965230951443685724997")
|
|
u.start = 1000
|
|
self.assertEqual(str(u), "'4000' codec can't decode bytes in position 1000-4: 965230951443685724997")
|
|
|
|
u = UnicodeTranslateError('xxxx', 1, 5, 'foo')
|
|
self.assertEqual(str(u), "can't translate characters in position 1-4: foo")
|
|
u.end = 2
|
|
self.assertEqual(str(u), "can't translate character '\\x78' in position 1: foo")
|
|
u.end = 5
|
|
u.reason = 0x345345345345345345
|
|
self.assertEqual(str(u), "can't translate characters in position 1-4: 965230951443685724997")
|
|
u.start = 1000
|
|
self.assertEqual(str(u), "can't translate characters in position 1000-4: 965230951443685724997")
|
|
|
|
def test_unicode_errors_no_object(self):
|
|
# See issue #21134.
|
|
klasses = UnicodeEncodeError, UnicodeDecodeError, UnicodeTranslateError
|
|
for klass in klasses:
|
|
self.assertEqual(str(klass.__new__(klass)), "")
|
|
|
|
@no_tracing
|
|
def test_badisinstance(self):
|
|
# Bug #2542: if issubclass(e, MyException) raises an exception,
|
|
# it should be ignored
|
|
class Meta(type):
|
|
def __subclasscheck__(cls, subclass):
|
|
raise ValueError()
|
|
class MyException(Exception, metaclass=Meta):
|
|
pass
|
|
|
|
with captured_output("stderr") as stderr:
|
|
try:
|
|
raise KeyError()
|
|
except MyException as e:
|
|
self.fail("exception should not be a MyException")
|
|
except KeyError:
|
|
pass
|
|
except:
|
|
self.fail("Should have raised KeyError")
|
|
else:
|
|
self.fail("Should have raised KeyError")
|
|
|
|
def g():
|
|
try:
|
|
return g()
|
|
except RuntimeError:
|
|
return sys.exc_info()
|
|
e, v, tb = g()
|
|
self.assertTrue(isinstance(v, RuntimeError), type(v))
|
|
self.assertIn("maximum recursion depth exceeded", str(v))
|
|
|
|
|
|
@cpython_only
|
|
def test_MemoryError(self):
|
|
# PyErr_NoMemory always raises the same exception instance.
|
|
# Check that the traceback is not doubled.
|
|
import traceback
|
|
from _testcapi import raise_memoryerror
|
|
def raiseMemError():
|
|
try:
|
|
raise_memoryerror()
|
|
except MemoryError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("Should have raises a MemoryError")
|
|
return traceback.format_tb(tb)
|
|
|
|
tb1 = raiseMemError()
|
|
tb2 = raiseMemError()
|
|
self.assertEqual(tb1, tb2)
|
|
|
|
@cpython_only
|
|
def test_exception_with_doc(self):
|
|
import _testcapi
|
|
doc2 = "This is a test docstring."
|
|
doc4 = "This is another test docstring."
|
|
|
|
self.assertRaises(SystemError, _testcapi.make_exception_with_doc,
|
|
"error1")
|
|
|
|
# test basic usage of PyErr_NewException
|
|
error1 = _testcapi.make_exception_with_doc("_testcapi.error1")
|
|
self.assertIs(type(error1), type)
|
|
self.assertTrue(issubclass(error1, Exception))
|
|
self.assertIsNone(error1.__doc__)
|
|
|
|
# test with given docstring
|
|
error2 = _testcapi.make_exception_with_doc("_testcapi.error2", doc2)
|
|
self.assertEqual(error2.__doc__, doc2)
|
|
|
|
# test with explicit base (without docstring)
|
|
error3 = _testcapi.make_exception_with_doc("_testcapi.error3",
|
|
base=error2)
|
|
self.assertTrue(issubclass(error3, error2))
|
|
|
|
# test with explicit base tuple
|
|
class C(object):
|
|
pass
|
|
error4 = _testcapi.make_exception_with_doc("_testcapi.error4", doc4,
|
|
(error3, C))
|
|
self.assertTrue(issubclass(error4, error3))
|
|
self.assertTrue(issubclass(error4, C))
|
|
self.assertEqual(error4.__doc__, doc4)
|
|
|
|
# test with explicit dictionary
|
|
error5 = _testcapi.make_exception_with_doc("_testcapi.error5", "",
|
|
error4, {'a': 1})
|
|
self.assertTrue(issubclass(error5, error4))
|
|
self.assertEqual(error5.a, 1)
|
|
self.assertEqual(error5.__doc__, "")
|
|
|
|
@cpython_only
|
|
def test_memory_error_cleanup(self):
|
|
# Issue #5437: preallocated MemoryError instances should not keep
|
|
# traceback objects alive.
|
|
from _testcapi import raise_memoryerror
|
|
class C:
|
|
pass
|
|
wr = None
|
|
def inner():
|
|
nonlocal wr
|
|
c = C()
|
|
wr = weakref.ref(c)
|
|
raise_memoryerror()
|
|
# We cannot use assertRaises since it manually deletes the traceback
|
|
try:
|
|
inner()
|
|
except MemoryError as e:
|
|
self.assertNotEqual(wr(), None)
|
|
else:
|
|
self.fail("MemoryError not raised")
|
|
self.assertEqual(wr(), None)
|
|
|
|
@no_tracing
|
|
def test_recursion_error_cleanup(self):
|
|
# Same test as above, but with "recursion exceeded" errors
|
|
class C:
|
|
pass
|
|
wr = None
|
|
def inner():
|
|
nonlocal wr
|
|
c = C()
|
|
wr = weakref.ref(c)
|
|
inner()
|
|
# We cannot use assertRaises since it manually deletes the traceback
|
|
try:
|
|
inner()
|
|
except RuntimeError as e:
|
|
self.assertNotEqual(wr(), None)
|
|
else:
|
|
self.fail("RuntimeError not raised")
|
|
self.assertEqual(wr(), None)
|
|
|
|
def test_errno_ENOTDIR(self):
|
|
# Issue #12802: "not a directory" errors are ENOTDIR even on Windows
|
|
with self.assertRaises(OSError) as cm:
|
|
os.listdir(__file__)
|
|
self.assertEqual(cm.exception.errno, errno.ENOTDIR, cm.exception)
|
|
|
|
|
|
class ImportErrorTests(unittest.TestCase):
|
|
|
|
def test_attributes(self):
|
|
# Setting 'name' and 'path' should not be a problem.
|
|
exc = ImportError('test')
|
|
self.assertIsNone(exc.name)
|
|
self.assertIsNone(exc.path)
|
|
|
|
exc = ImportError('test', name='somemodule')
|
|
self.assertEqual(exc.name, 'somemodule')
|
|
self.assertIsNone(exc.path)
|
|
|
|
exc = ImportError('test', path='somepath')
|
|
self.assertEqual(exc.path, 'somepath')
|
|
self.assertIsNone(exc.name)
|
|
|
|
exc = ImportError('test', path='somepath', name='somename')
|
|
self.assertEqual(exc.name, 'somename')
|
|
self.assertEqual(exc.path, 'somepath')
|
|
|
|
def test_non_str_argument(self):
|
|
# Issue #15778
|
|
with check_warnings(('', BytesWarning), quiet=True):
|
|
arg = b'abc'
|
|
exc = ImportError(arg)
|
|
self.assertEqual(str(arg), str(exc))
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|