730 lines
26 KiB
Python
730 lines
26 KiB
Python
# Python test set -- part 5, built-in exceptions
|
|
|
|
import os
|
|
import sys
|
|
import unittest
|
|
import pickle
|
|
import weakref
|
|
|
|
from test.support import (TESTFN, unlink, run_unittest, captured_output,
|
|
gc_collect, cpython_only)
|
|
|
|
# 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.assertEquals(buf1, buf2)
|
|
self.assertEquals(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('')
|
|
except EOFError:
|
|
pass
|
|
finally:
|
|
sys.stdin = savestdin
|
|
fp.close()
|
|
unlink(TESTFN)
|
|
|
|
self.raise_catch(IOError, "IOError")
|
|
self.assertRaises(IOError, 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")
|
|
|
|
@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.assertEquals(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.assertEquals(co.co_name, "__init__")
|
|
self.assertTrue(co.co_filename.endswith('test_exceptions.py'))
|
|
co2 = tb.tb_frame.f_back.f_code
|
|
self.assertEquals(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.assertEqual(str(WindowsError(1001)),
|
|
"1001")
|
|
self.assertEqual(str(WindowsError(1001, "message")),
|
|
"[Error 1001] message")
|
|
self.assertEqual(WindowsError(1001, "message").errno, 22)
|
|
self.assertEqual(WindowsError(1001, "message").winerror, 1001)
|
|
|
|
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'}),
|
|
(IOError, ('foo',),
|
|
{'args' : ('foo',), 'filename' : None,
|
|
'errno' : None, 'strerror' : None}),
|
|
(IOError, ('foo', 'bar'),
|
|
{'args' : ('foo', 'bar'), 'filename' : None,
|
|
'errno' : 'foo', 'strerror' : 'bar'}),
|
|
(IOError, ('foo', 'bar', 'baz'),
|
|
{'args' : ('foo', 'bar'), 'filename' : 'baz',
|
|
'errno' : 'foo', 'strerror' : 'bar'}),
|
|
(IOError, ('foo', 'bar', 'baz', 'quux'),
|
|
{'args' : ('foo', 'bar', 'baz', 'quux')}),
|
|
(EnvironmentError, ('errnoStr', 'strErrorStr', 'filenameStr'),
|
|
{'args' : ('errnoStr', 'strErrorStr'),
|
|
'strerror' : 'strErrorStr', 'errno' : 'errnoStr',
|
|
'filename' : 'filenameStr'}),
|
|
(EnvironmentError, (1, 'strErrorStr', 'filenameStr'),
|
|
{'args' : (1, 'strErrorStr'), 'errno' : 1,
|
|
'strerror' : 'strErrorStr', 'filename' : 'filenameStr'}),
|
|
(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}),
|
|
]
|
|
try:
|
|
exceptionList.append(
|
|
(WindowsError, (1, 'strErrorStr', 'filenameStr'),
|
|
{'args' : (1, 'strErrorStr'),
|
|
'strerror' : 'strErrorStr', 'winerror' : 1,
|
|
'errno' : 22, 'filename' : 'filenameStr'})
|
|
)
|
|
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
|
|
self.assertEquals(type(e).__module__, 'builtins')
|
|
# Verify no ref leaks in Exc_str()
|
|
s = str(e)
|
|
for checkArgName in expected:
|
|
value = getattr(e, checkArgName)
|
|
self.assertEquals(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.assertEquals(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.assertEqual(e.__context__, None)
|
|
self.assertEqual(e.__cause__, None)
|
|
|
|
e = TypeError()
|
|
self.assertEqual(e.__context__, None)
|
|
self.assertEqual(e.__cause__, None)
|
|
|
|
class MyException(EnvironmentError):
|
|
pass
|
|
|
|
e = MyException()
|
|
self.assertEqual(e.__context__, None)
|
|
self.assertEqual(e.__cause__, None)
|
|
|
|
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.assertEquals(x.fancy_arg, 42)
|
|
|
|
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()
|
|
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
|
|
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
|
|
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.assertEquals(next(g), KeyError)
|
|
self.assertEquals(sys.exc_info()[0], None)
|
|
self.assertEquals(next(g), KeyError)
|
|
self.assertEquals(sys.exc_info()[0], None)
|
|
self.assertEquals(next(g), None)
|
|
|
|
# Same test, but inside an exception handler
|
|
try:
|
|
raise TypeError("foo")
|
|
except TypeError:
|
|
g = yield_raise()
|
|
self.assertEquals(next(g), KeyError)
|
|
self.assertEquals(sys.exc_info()[0], TypeError)
|
|
self.assertEquals(next(g), KeyError)
|
|
self.assertEquals(sys.exc_info()[0], TypeError)
|
|
self.assertEquals(next(g), TypeError)
|
|
del g
|
|
self.assertEquals(sys.exc_info()[0], TypeError)
|
|
|
|
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 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.assertEquals(e, (None, None, None))
|
|
|
|
def testUnicodeChangeAttributes(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_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))
|
|
|
|
|
|
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__, "")
|
|
|
|
|
|
def test_main():
|
|
run_unittest(ExceptionTests)
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|