| # Python test set -- part 5, built-in exceptions | |
| import copy | |
| import gc | |
| import os | |
| import sys | |
| import unittest | |
| import pickle | |
| import weakref | |
| import errno | |
| from test.support import (TESTFN, captured_stderr, check_impl_detail, | |
| check_warnings, cpython_only, gc_collect, | |
| no_tracing, unlink, import_module, script_helper, | |
| SuppressCrashReport) | |
| from test import support | |
| class NaiveException(Exception): | |
| def __init__(self, x): | |
| self.x = x | |
| class SlottedNaiveException(Exception): | |
| __slots__ = ('x',) | |
| def __init__(self, x): | |
| self.x = x | |
| class BrokenStrException(Exception): | |
| def __str__(self): | |
| raise Exception("str() is broken") | |
| # XXX This is not really enough, each *operation* should be tested! | |
| class ExceptionTests(unittest.TestCase): | |
| def raise_catch(self, exc, excname): | |
| with self.subTest(exc=exc, excname=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(RecursionError, "RecursionError") | |
| 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 | |
| self.raise_catch(StopAsyncIteration, "StopAsyncIteration") | |
| def testSyntaxErrorMessage(self): | |
| # make sure the right exception message is raised for each of | |
| # these code fragments | |
| def ckmsg(src, msg): | |
| with self.subTest(src=src, msg=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 = '''if 1: | |
| try: | |
| continue | |
| except: | |
| pass''' | |
| ckmsg(s, "'continue' not properly in loop") | |
| ckmsg("continue\n", "'continue' not properly in loop") | |
| def testSyntaxErrorMissingParens(self): | |
| def ckmsg(src, msg, exception=SyntaxError): | |
| try: | |
| compile(src, '<fragment>', 'exec') | |
| except exception as e: | |
| if e.msg != msg: | |
| self.fail("expected %s, got %s" % (msg, e.msg)) | |
| else: | |
| self.fail("failed to get expected SyntaxError") | |
| s = '''print "old style"''' | |
| ckmsg(s, "Missing parentheses in call to 'print'. " | |
| "Did you mean print(\"old style\")?") | |
| s = '''print "old style",''' | |
| ckmsg(s, "Missing parentheses in call to 'print'. " | |
| "Did you mean print(\"old style\", end=\" \")?") | |
| s = '''exec "old style"''' | |
| ckmsg(s, "Missing parentheses in call to 'exec'") | |
| # should not apply to subclasses, see issue #31161 | |
| s = '''if True:\nprint "No indent"''' | |
| ckmsg(s, "expected an indented block", IndentationError) | |
| s = '''if True:\n print()\n\texec "mixed tabs and spaces"''' | |
| ckmsg(s, "inconsistent use of tabs and spaces in indentation", TabError) | |
| def check(self, src, lineno, offset, encoding='utf-8'): | |
| with self.subTest(source=src, lineno=lineno, offset=offset): | |
| with self.assertRaises(SyntaxError) as cm: | |
| compile(src, '<fragment>', 'exec') | |
| self.assertEqual(cm.exception.lineno, lineno) | |
| self.assertEqual(cm.exception.offset, offset) | |
| if cm.exception.text is not None: | |
| if not isinstance(src, str): | |
| src = src.decode(encoding, 'replace') | |
| line = src.split('\n')[lineno-1] | |
| self.assertIn(line, cm.exception.text) | |
| def testSyntaxErrorOffset(self): | |
| check = self.check | |
| 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) | |
| check(b'# -*- coding: cp1251 -*-\nPython = "\xcf\xb3\xf2\xee\xed" +', | |
| 2, 19, encoding='cp1251') | |
| check(b'Python = "\xcf\xb3\xf2\xee\xed" +', 1, 18) | |
| check('x = "a', 1, 7) | |
| check('lambda x: x = 2', 1, 1) | |
| check('f{a + b + c}', 1, 2) | |
| # Errors thrown by compile.c | |
| check('class foo:return 1', 1, 11) | |
| check('def f():\n continue', 2, 3) | |
| check('def f():\n break', 2, 3) | |
| check('try:\n pass\nexcept:\n pass\nexcept ValueError:\n pass', 2, 3) | |
| # Errors thrown by tokenizer.c | |
| check('(0x+1)', 1, 3) | |
| check('x = 0xI', 1, 6) | |
| check('0010 + 2', 1, 4) | |
| check('x = 32e-+4', 1, 8) | |
| check('x = 0o9', 1, 6) | |
| check('\u03b1 = 0xI', 1, 6) | |
| check(b'\xce\xb1 = 0xI', 1, 6) | |
| check(b'# -*- coding: iso8859-7 -*-\n\xe1 = 0xI', 2, 6, | |
| encoding='iso8859-7') | |
| check(b"""if 1: | |
| def foo(): | |
| ''' | |
| def bar(): | |
| pass | |
| def baz(): | |
| '''quux''' | |
| """, 9, 20) | |
| check("pass\npass\npass\n(1+)\npass\npass\npass", 4, 4) | |
| check("(1+)", 1, 4) | |
| # Errors thrown by symtable.c | |
| check('x = [(yield i) for i in range(3)]', 1, 5) | |
| check('def f():\n from _ import *', 1, 1) | |
| check('def f(x, x):\n pass', 1, 1) | |
| check('def f(x):\n nonlocal x', 2, 3) | |
| check('def f(x):\n x = 1\n global x', 3, 3) | |
| check('nonlocal x', 1, 1) | |
| check('def f():\n global x\n nonlocal x', 2, 3) | |
| # Errors thrown by future.c | |
| check('from __future__ import doesnt_exist', 1, 1) | |
| check('from __future__ import braces', 1, 1) | |
| check('x=1\nfrom __future__ import division', 2, 1) | |
| check('foo(1=2)', 1, 5) | |
| check('def f():\n x, y: int', 2, 3) | |
| check('[*x for x in xs]', 1, 2) | |
| check('foo(x for x in range(10), 100)', 1, 5) | |
| check('(yield i) = 2', 1, 1 if support.use_old_parser() else 2) | |
| check('def f(*):\n pass', 1, 7 if support.use_old_parser() else 8) | |
| check('for 1 in []: pass', 1, 5) | |
| @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(RecursionError, f) | |
| def g(): | |
| try: | |
| return g() | |
| except ValueError: | |
| return -1 | |
| self.assertRaises(RecursionError, 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.assertIsNone(obj) | |
| # Qualified "except" without "as" | |
| obj = MyObj() | |
| wr = weakref.ref(obj) | |
| try: | |
| inner_raising_func() | |
| except MyException: | |
| pass | |
| obj = None | |
| obj = wr() | |
| self.assertIsNone(obj) | |
| # Bare "except" | |
| obj = MyObj() | |
| wr = weakref.ref(obj) | |
| try: | |
| inner_raising_func() | |
| except: | |
| pass | |
| obj = None | |
| obj = wr() | |
| self.assertIsNone(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.assertIsNone(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.assertIsNone(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.assertIsNone(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.assertIsNone(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.assertIsNone(obj) | |
| 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_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 RecursionError: | |
| return sys.exc_info() | |
| e, v, tb = g() | |
| self.assertIsInstance(v, RecursionError, type(v)) | |
| self.assertIn("maximum recursion depth exceeded", str(v)) | |
| @cpython_only | |
| def test_recursion_normalizing_exception(self): | |
| # Issue #22898. | |
| # Test that a RecursionError is raised when tstate->recursion_depth is | |
| # equal to recursion_limit in PyErr_NormalizeException() and check | |
| # that a ResourceWarning is printed. | |
| # Prior to #22898, the recursivity of PyErr_NormalizeException() was | |
| # controlled by tstate->recursion_depth and a PyExc_RecursionErrorInst | |
| # singleton was being used in that case, that held traceback data and | |
| # locals indefinitely and would cause a segfault in _PyExc_Fini() upon | |
| # finalization of these locals. | |
| code = """if 1: | |
| import sys | |
| from _testinternalcapi import get_recursion_depth | |
| class MyException(Exception): pass | |
| def setrecursionlimit(depth): | |
| while 1: | |
| try: | |
| sys.setrecursionlimit(depth) | |
| return depth | |
| except RecursionError: | |
| # sys.setrecursionlimit() raises a RecursionError if | |
| # the new recursion limit is too low (issue #25274). | |
| depth += 1 | |
| def recurse(cnt): | |
| cnt -= 1 | |
| if cnt: | |
| recurse(cnt) | |
| else: | |
| generator.throw(MyException) | |
| def gen(): | |
| f = open(%a, mode='rb', buffering=0) | |
| yield | |
| generator = gen() | |
| next(generator) | |
| recursionlimit = sys.getrecursionlimit() | |
| depth = get_recursion_depth() | |
| try: | |
| # Upon the last recursive invocation of recurse(), | |
| # tstate->recursion_depth is equal to (recursion_limit - 1) | |
| # and is equal to recursion_limit when _gen_throw() calls | |
| # PyErr_NormalizeException(). | |
| recurse(setrecursionlimit(depth + 2) - depth - 1) | |
| finally: | |
| sys.setrecursionlimit(recursionlimit) | |
| print('Done.') | |
| """ % __file__ | |
| rc, out, err = script_helper.assert_python_failure("-Wd", "-c", code) | |
| # Check that the program does not fail with SIGABRT. | |
| self.assertEqual(rc, 1) | |
| self.assertIn(b'RecursionError', err) | |
| self.assertIn(b'ResourceWarning', err) | |
| self.assertIn(b'Done.', out) | |
| @cpython_only | |
| def test_recursion_normalizing_infinite_exception(self): | |
| # Issue #30697. Test that a RecursionError is raised when | |
| # PyErr_NormalizeException() maximum recursion depth has been | |
| # exceeded. | |
| code = """if 1: | |
| import _testcapi | |
| try: | |
| raise _testcapi.RecursingInfinitelyError | |
| finally: | |
| print('Done.') | |
| """ | |
| rc, out, err = script_helper.assert_python_failure("-c", code) | |
| self.assertEqual(rc, 1) | |
| self.assertIn(b'RecursionError: maximum recursion depth exceeded ' | |
| b'while normalizing an exception', err) | |
| self.assertIn(b'Done.', out) | |
| @cpython_only | |
| def test_recursion_normalizing_with_no_memory(self): | |
| # Issue #30697. Test that in the abort that occurs when there is no | |
| # memory left and the size of the Python frames stack is greater than | |
| # the size of the list of preallocated MemoryError instances, the | |
| # Fatal Python error message mentions MemoryError. | |
| code = """if 1: | |
| import _testcapi | |
| class C(): pass | |
| def recurse(cnt): | |
| cnt -= 1 | |
| if cnt: | |
| recurse(cnt) | |
| else: | |
| _testcapi.set_nomemory(0) | |
| C() | |
| recurse(16) | |
| """ | |
| with SuppressCrashReport(): | |
| rc, out, err = script_helper.assert_python_failure("-c", code) | |
| self.assertIn(b'Fatal Python error: _PyErr_NormalizeException: ' | |
| b'Cannot recover from MemoryErrors while ' | |
| b'normalizing exceptions.', err) | |
| @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 RecursionError as e: | |
| self.assertNotEqual(wr(), None) | |
| else: | |
| self.fail("RecursionError 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) | |
| def test_unraisable(self): | |
| # Issue #22836: PyErr_WriteUnraisable() should give sensible reports | |
| class BrokenDel: | |
| def __del__(self): | |
| exc = ValueError("del is broken") | |
| # The following line is included in the traceback report: | |
| raise exc | |
| obj = BrokenDel() | |
| with support.catch_unraisable_exception() as cm: | |
| del obj | |
| self.assertEqual(cm.unraisable.object, BrokenDel.__del__) | |
| self.assertIsNotNone(cm.unraisable.exc_traceback) | |
| def test_unhandled(self): | |
| # Check for sensible reporting of unhandled exceptions | |
| for exc_type in (ValueError, BrokenStrException): | |
| with self.subTest(exc_type): | |
| try: | |
| exc = exc_type("test message") | |
| # The following line is included in the traceback report: | |
| raise exc | |
| except exc_type: | |
| with captured_stderr() as stderr: | |
| sys.__excepthook__(*sys.exc_info()) | |
| report = stderr.getvalue() | |
| self.assertIn("test_exceptions.py", report) | |
| self.assertIn("raise exc", report) | |
| self.assertIn(exc_type.__name__, report) | |
| if exc_type is BrokenStrException: | |
| self.assertIn("<exception str() failed>", report) | |
| else: | |
| self.assertIn("test message", report) | |
| self.assertTrue(report.endswith("\n")) | |
| @cpython_only | |
| def test_memory_error_in_PyErr_PrintEx(self): | |
| code = """if 1: | |
| import _testcapi | |
| class C(): pass | |
| _testcapi.set_nomemory(0, %d) | |
| C() | |
| """ | |
| # Issue #30817: Abort in PyErr_PrintEx() when no memory. | |
| # Span a large range of tests as the CPython code always evolves with | |
| # changes that add or remove memory allocations. | |
| for i in range(1, 20): | |
| rc, out, err = script_helper.assert_python_failure("-c", code % i) | |
| self.assertIn(rc, (1, 120)) | |
| self.assertIn(b'MemoryError', err) | |
| def test_yield_in_nested_try_excepts(self): | |
| #Issue #25612 | |
| class MainError(Exception): | |
| pass | |
| class SubError(Exception): | |
| pass | |
| def main(): | |
| try: | |
| raise MainError() | |
| except MainError: | |
| try: | |
| yield | |
| except SubError: | |
| pass | |
| raise | |
| coro = main() | |
| coro.send(None) | |
| with self.assertRaises(MainError): | |
| coro.throw(SubError()) | |
| def test_generator_doesnt_retain_old_exc2(self): | |
| #Issue 28884#msg282532 | |
| def g(): | |
| try: | |
| raise ValueError | |
| except ValueError: | |
| yield 1 | |
| self.assertEqual(sys.exc_info(), (None, None, None)) | |
| yield 2 | |
| gen = g() | |
| try: | |
| raise IndexError | |
| except IndexError: | |
| self.assertEqual(next(gen), 1) | |
| self.assertEqual(next(gen), 2) | |
| def test_raise_in_generator(self): | |
| #Issue 25612#msg304117 | |
| def g(): | |
| yield 1 | |
| raise | |
| yield 2 | |
| with self.assertRaises(ZeroDivisionError): | |
| i = g() | |
| try: | |
| 1/0 | |
| except: | |
| next(i) | |
| next(i) | |
| @unittest.skipUnless(__debug__, "Won't work if __debug__ is False") | |
| def test_assert_shadowing(self): | |
| # Shadowing AssertionError would cause the assert statement to | |
| # misbehave. | |
| global AssertionError | |
| AssertionError = TypeError | |
| try: | |
| assert False, 'hello' | |
| except BaseException as e: | |
| del AssertionError | |
| self.assertIsInstance(e, AssertionError) | |
| self.assertEqual(str(e), 'hello') | |
| else: | |
| del AssertionError | |
| self.fail('Expected exception') | |
| def test_memory_error_subclasses(self): | |
| # bpo-41654: MemoryError instances use a freelist of objects that are | |
| # linked using the 'dict' attribute when they are inactive/dead. | |
| # Subclasses of MemoryError should not participate in the freelist | |
| # schema. This test creates a MemoryError object and keeps it alive | |
| # (therefore advancing the freelist) and then it creates and destroys a | |
| # subclass object. Finally, it checks that creating a new MemoryError | |
| # succeeds, proving that the freelist is not corrupted. | |
| class TestException(MemoryError): | |
| pass | |
| try: | |
| raise MemoryError | |
| except MemoryError as exc: | |
| inst = exc | |
| try: | |
| raise TestException | |
| except Exception: | |
| pass | |
| for _ in range(10): | |
| try: | |
| raise MemoryError | |
| except MemoryError as exc: | |
| pass | |
| gc_collect() | |
| 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') | |
| msg = "'invalid' is an invalid keyword argument for ImportError" | |
| with self.assertRaisesRegex(TypeError, msg): | |
| ImportError('test', invalid='keyword') | |
| with self.assertRaisesRegex(TypeError, msg): | |
| ImportError('test', name='name', invalid='keyword') | |
| with self.assertRaisesRegex(TypeError, msg): | |
| ImportError('test', path='path', invalid='keyword') | |
| with self.assertRaisesRegex(TypeError, msg): | |
| ImportError(invalid='keyword') | |
| with self.assertRaisesRegex(TypeError, msg): | |
| ImportError('test', invalid='keyword', another=True) | |
| def test_reset_attributes(self): | |
| exc = ImportError('test', name='name', path='path') | |
| self.assertEqual(exc.args, ('test',)) | |
| self.assertEqual(exc.msg, 'test') | |
| self.assertEqual(exc.name, 'name') | |
| self.assertEqual(exc.path, 'path') | |
| # Reset not specified attributes | |
| exc.__init__() | |
| self.assertEqual(exc.args, ()) | |
| self.assertEqual(exc.msg, None) | |
| self.assertEqual(exc.name, None) | |
| self.assertEqual(exc.path, None) | |
| 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)) | |
| def test_copy_pickle(self): | |
| for kwargs in (dict(), | |
| dict(name='somename'), | |
| dict(path='somepath'), | |
| dict(name='somename', path='somepath')): | |
| orig = ImportError('test', **kwargs) | |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): | |
| exc = pickle.loads(pickle.dumps(orig, proto)) | |
| self.assertEqual(exc.args, ('test',)) | |
| self.assertEqual(exc.msg, 'test') | |
| self.assertEqual(exc.name, orig.name) | |
| self.assertEqual(exc.path, orig.path) | |
| for c in copy.copy, copy.deepcopy: | |
| exc = c(orig) | |
| self.assertEqual(exc.args, ('test',)) | |
| self.assertEqual(exc.msg, 'test') | |
| self.assertEqual(exc.name, orig.name) | |
| self.assertEqual(exc.path, orig.path) | |
| if __name__ == '__main__': | |
| unittest.main() |