diff options
Diffstat (limited to 'Lib/test/test_exceptions.py')
| -rw-r--r-- | Lib/test/test_exceptions.py | 1382 |
1 files changed, 356 insertions, 1026 deletions
diff --git a/Lib/test/test_exceptions.py b/Lib/test/test_exceptions.py index 4d1aa4b..bc8944d 100644 --- a/Lib/test/test_exceptions.py +++ b/Lib/test/test_exceptions.py @@ -1,45 +1,41 @@ # Python test set -- part 5, built-in exceptions -import copy import os import sys import unittest -import pickle -import weakref -import errno +import pickle, cPickle -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 +from test.test_support import (TESTFN, unlink, run_unittest, captured_stderr, + check_warnings, cpython_only) +from test.test_pep352 import ignore_deprecation_warnings class BrokenStrException(Exception): def __str__(self): raise Exception("str() is broken") + __repr__ = __str__ # Python 2's PyErr_WriteUnraisable() uses repr() # XXX This is not really enough, each *operation* should be tested! class ExceptionTests(unittest.TestCase): + def testReload(self): + # Reloading the built-in exceptions module failed prior to Py2.2, while it + # should act the same as reloading built-in sys. + try: + from imp import reload + import exceptions + reload(exceptions) + except ImportError, e: + self.fail("reloading exceptions: %s" % e) + def raise_catch(self, exc, excname): try: - raise exc("spam") - except exc as err: + raise exc, "spam" + except exc, err: buf1 = str(err) try: raise exc("spam") - except exc as err: + except exc, err: buf2 = str(err) self.assertEqual(buf1, buf2) self.assertEqual(exc.__name__, excname) @@ -55,8 +51,8 @@ class ExceptionTests(unittest.TestCase): savestdin = sys.stdin try: try: - import marshal - marshal.loads(b'') + sys.stdin = fp + x = raw_input() except EOFError: pass finally: @@ -64,8 +60,8 @@ class ExceptionTests(unittest.TestCase): fp.close() unlink(TESTFN) - self.raise_catch(OSError, "OSError") - self.assertRaises(OSError, open, 'this file does not exist', 'r') + 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") @@ -92,19 +88,18 @@ class ExceptionTests(unittest.TestCase): 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') + 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") + # can only be tested under -tt, and is the only test for -tt + #try: compile("try:\n\t1.0/0.0\n \t1.0/0.0\nfinally:\n pass\n", '<string>', 'exec') + #except TabError: pass + #else: self.fail("TabError not raised") self.raise_catch(SystemError, "SystemError") @@ -116,17 +111,15 @@ class ExceptionTests(unittest.TestCase): except TypeError: pass self.raise_catch(ValueError, "ValueError") - self.assertRaises(ValueError, chr, 17<<16) + self.assertRaises(ValueError, chr, 10000) self.raise_catch(ZeroDivisionError, "ZeroDivisionError") - try: x = 1/0 + 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") + try: x = 1 // 0 + except Exception, e: pass def testSyntaxErrorMessage(self): # make sure the right exception message is raised for each of @@ -135,12 +128,21 @@ class ExceptionTests(unittest.TestCase): def ckmsg(src, msg): try: compile(src, '<fragment>', 'exec') - except SyntaxError as e: + except SyntaxError, 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 @@ -150,107 +152,24 @@ class ExceptionTests(unittest.TestCase): 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 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) - check('x = "a', 1, 7) - check('lambda x: x = 2', 1, 1) - - # 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) - - # 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 ast.c - check('for 1 in []: pass', 1, 5) - check('def f(*):\n pass', 1, 7) - check('[*x for x in xs]', 1, 2) - check('def f():\n x, y: int', 2, 3) - check('(yield i) = 2', 1, 1) - check('foo(x for x in range(10), 100)', 1, 5) - check('foo(1=2)', 1, 5) - - # 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) - - @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): + class BadException: def __init__(self_): - raise RuntimeError("can't instantiate BadException") - - class InvalidException: - pass + raise RuntimeError, "can't instantiate BadException" def test_capi1(): import _testcapi try: _testcapi.raise_exception(BadException, 1) - except TypeError as err: + except TypeError, 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')) + self.assertTrue(co.co_filename.endswith('test_exceptions'+os.extsep+'py')) else: self.fail("Expected exception") @@ -258,25 +177,19 @@ class ExceptionTests(unittest.TestCase): import _testcapi try: _testcapi.raise_exception(BadException, 0) - except RuntimeError as err: + except RuntimeError, 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')) + self.assertTrue(co.co_filename.endswith('test_exceptions'+os.extsep+'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: @@ -284,254 +197,161 @@ class ExceptionTests(unittest.TestCase): 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) - + 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) + + @ignore_deprecation_warnings def testAttributes(self): # test that exception attributes are happy exceptionList = [ - (BaseException, (), {'args' : ()}), - (BaseException, (1, ), {'args' : (1,)}), + (BaseException, (), {'message' : '', 'args' : ()}), + (BaseException, (1, ), {'message' : 1, 'args' : (1,)}), (BaseException, ('foo',), - {'args' : ('foo',)}), + {'message' : 'foo', 'args' : ('foo',)}), (BaseException, ('foo', 1), - {'args' : ('foo', 1)}), + {'message' : '', 'args' : ('foo', 1)}), (SystemExit, ('foo',), - {'args' : ('foo',), 'code' : 'foo'}), - (OSError, ('foo',), - {'args' : ('foo',), 'filename' : None, 'filename2' : None, + {'message' : 'foo', 'args' : ('foo',), 'code' : 'foo'}), + (IOError, ('foo',), + {'message' : 'foo', 'args' : ('foo',), 'filename' : None, 'errno' : None, 'strerror' : None}), - (OSError, ('foo', 'bar'), - {'args' : ('foo', 'bar'), - 'filename' : None, 'filename2' : None, + (IOError, ('foo', 'bar'), + {'message' : '', 'args' : ('foo', 'bar'), 'filename' : None, 'errno' : 'foo', 'strerror' : 'bar'}), - (OSError, ('foo', 'bar', 'baz'), - {'args' : ('foo', 'bar'), - 'filename' : 'baz', 'filename2' : None, + (IOError, ('foo', 'bar', 'baz'), + {'message' : '', 'args' : ('foo', 'bar'), 'filename' : 'baz', 'errno' : 'foo', 'strerror' : 'bar'}), - (OSError, ('foo', 'bar', 'baz', None, 'quux'), - {'args' : ('foo', 'bar'), 'filename' : 'baz', 'filename2': 'quux'}), - (OSError, ('errnoStr', 'strErrorStr', 'filenameStr'), - {'args' : ('errnoStr', 'strErrorStr'), + (IOError, ('foo', 'bar', 'baz', 'quux'), + {'message' : '', 'args' : ('foo', 'bar', 'baz', 'quux')}), + (EnvironmentError, ('errnoStr', 'strErrorStr', 'filenameStr'), + {'message' : '', '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, + (EnvironmentError, (1, 'strErrorStr', 'filenameStr'), + {'message' : '', 'args' : (1, 'strErrorStr'), 'errno' : 1, + 'strerror' : 'strErrorStr', 'filename' : 'filenameStr'}), + (SyntaxError, (), {'message' : '', 'msg' : None, 'text' : None, 'filename' : None, 'lineno' : None, 'offset' : None, 'print_file_and_line' : None}), (SyntaxError, ('msgStr',), - {'args' : ('msgStr',), 'text' : None, + {'message' : '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', + {'message' : '', '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, + {'message' : '', '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, + (UnicodeError, (), {'message' : '', 'args' : (),}), + (UnicodeEncodeError, ('ascii', u'a', 0, 1, 'ordinal not in range'), + {'message' : '', 'args' : ('ascii', u'a', 0, 1, 'ordinal not in range'), - 'encoding' : 'ascii', 'object' : b'\xff', + 'encoding' : 'ascii', 'object' : u'a', 'start' : 0, 'reason' : 'ordinal not in range'}), - (UnicodeDecodeError, ('ascii', b'\xff', 0, 1, - 'ordinal not in range'), - {'args' : ('ascii', b'\xff', 0, 1, + (UnicodeDecodeError, ('ascii', '\xff', 0, 1, 'ordinal not in range'), + {'message' : '', 'args' : ('ascii', '\xff', 0, 1, 'ordinal not in range'), - 'encoding' : 'ascii', 'object' : b'\xff', + 'encoding' : 'ascii', 'object' : '\xff', 'start' : 0, 'reason' : 'ordinal not in range'}), - (UnicodeTranslateError, ("\u3042", 0, 1, "ouch"), - {'args' : ('\u3042', 0, 1, 'ouch'), - 'object' : '\u3042', 'reason' : 'ouch', + (UnicodeTranslateError, (u"\u3042", 0, 1, "ouch"), + {'message' : '', 'args' : (u'\u3042', 0, 1, 'ouch'), + 'object' : u'\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}) + {'message' : '', '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: + raise exc(*args) + except BaseException, e: + if type(e) is not exc: + raise # Verify module name - if not type(e).__name__.endswith('NaiveException'): - self.assertEqual(type(e).__module__, 'builtins') + self.assertEqual(type(e).__module__, 'exceptions') # Verify no ref leaks in Exc_str() s = str(e) for checkArgName in expected: - value = getattr(e, checkArgName) - self.assertEqual(repr(value), + self.assertEqual(repr(getattr(e, checkArgName)), repr(expected[checkArgName]), - '%r.%s == %r, expected %r' % ( - e, checkArgName, - value, expected[checkArgName])) + 'exception "%s", attribute "%s"' % + (repr(e), checkArgName)) # test for pickling support - for p in [pickle]: + for p in pickle, cPickle: for protocol in range(p.HIGHEST_PROTOCOL + 1): - s = p.dumps(e, protocol) - new = p.loads(s) + new = p.loads(p.dumps(e, protocol)) for checkArgName in expected: got = repr(getattr(new, checkArgName)) want = repr(expected[checkArgName]) self.assertEqual(got, want, - 'pickled "%r", attribute "%s' % + '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 testDeprecatedMessageAttribute(self): + # Accessing BaseException.message and relying on its value set by + # BaseException.__init__ triggers a deprecation warning. + exc = BaseException("foo") + with check_warnings(("BaseException.message has been deprecated " + "as of Python 2.6", DeprecationWarning)) as w: + self.assertEqual(exc.message, "foo") + self.assertEqual(len(w.warnings), 1) + + def testRegularMessageAttribute(self): + # Accessing BaseException.message after explicitly setting a value + # for it does not trigger a deprecation warning. + exc = BaseException("foo") + exc.message = "bar" + with check_warnings(quiet=True) as w: + self.assertEqual(exc.message, "bar") + self.assertEqual(len(w.warnings), 0) + # Deleting the message is supported, too. + del exc.message + with self.assertRaises(AttributeError): + exc.message + + @ignore_deprecation_warnings + def testPickleMessageAttribute(self): + # Pickling with message attribute must work, as well. + e = Exception("foo") + f = Exception("foo") + f.message = "bar" + for p in pickle, cPickle: + ep = p.loads(p.dumps(e)) + self.assertEqual(ep.message, "foo") + fp = p.loads(p.dumps(f)) + self.assertEqual(fp.message, "bar") + + @ignore_deprecation_warnings + def testSlicing(self): + # Test that you can slice an exception directly instead of requiring + # going through the 'args' attribute. + args = (1, 2, 3) + exc = BaseException(*args) + self.assertEqual(exc[:], args) + self.assertEqual(exc.args[:], args) def testKeywordArgs(self): # test that builtin exception don't take keyword args, @@ -546,362 +366,46 @@ class ExceptionTests(unittest.TestCase): x = DerivedException(fancy_arg=42) self.assertEqual(x.fancy_arg, 42) - @no_tracing def testInfiniteRecursion(self): def f(): return f() - self.assertRaises(RecursionError, f) + self.assertRaises(RuntimeError, 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(): + # The test prints an unraisable recursion error when + # doing "except ValueError", this is because subclass + # checking has recursion checking too. + with captured_stderr(): 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 + g() 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 + except: + self.fail("Should have raised KeyError") else: - self.fail("should have raised StopIteration") - self._check_generator_cleanup_exc_state(do_send) + self.fail("Should have raised KeyError") - 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 testUnicodeStrUsage(self): + # Make sure both instances and classes have a str and unicode + # representation. + self.assertTrue(str(Exception)) + self.assertTrue(unicode(Exception)) + self.assertTrue(str(Exception('a'))) + self.assertTrue(unicode(Exception(u'a'))) + self.assertTrue(unicode(Exception(u'\xe1'))) - def test_unicode_change_attributes(self): + def testUnicodeChangeAttributes(self): # See issue 7309. This was a crasher. - u = UnicodeEncodeError('baz', 'xxxxx', 1, 5, 'foo') + u = UnicodeEncodeError('baz', u'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") + self.assertEqual(str(u), "'baz' codec can't encode character u'\\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") @@ -910,7 +414,7 @@ class ExceptionTests(unittest.TestCase): 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') + u = UnicodeDecodeError('baz', '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") @@ -922,10 +426,10 @@ class ExceptionTests(unittest.TestCase): u.start = 1000 self.assertEqual(str(u), "'4000' codec can't decode bytes in position 1000-4: 965230951443685724997") - u = UnicodeTranslateError('xxxx', 1, 5, 'foo') + u = UnicodeTranslateError(u'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") + self.assertEqual(str(u), "can't translate character u'\\x78' in position 1: foo") u.end = 5 u.reason = 0x345345345345345345 self.assertEqual(str(u), "can't translate characters in position 1-4: 965230951443685724997") @@ -938,20 +442,21 @@ class ExceptionTests(unittest.TestCase): 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): + + class MyException(Exception): + __metaclass__ = Meta pass with captured_stderr() as stderr: try: raise KeyError() - except MyException as e: + except MyException, e: self.fail("exception should not be a MyException") except KeyError: pass @@ -960,133 +465,149 @@ class ExceptionTests(unittest.TestCase): 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 _testcapi 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: Cannot recover from ' - b'MemoryErrors while normalizing exceptions.', err) + with captured_stderr() as stderr: + def g(): + try: + return g() + except RuntimeError: + return sys.exc_info() + e, v, tb = g() + self.assertTrue(e is RuntimeError, e) + self.assertIn("maximum recursion depth exceeded", str(v)) + + def test_new_returns_invalid_instance(self): + # See issue #11627. + class MyException(Exception): + def __new__(cls, *args): + return object() - @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) + with self.assertRaises(TypeError): + raise MyException - tb1 = raiseMemError() - tb2 = raiseMemError() - self.assertEqual(tb1, tb2) + def test_assert_with_tuple_arg(self): + try: + assert False, (3,) + except AssertionError as e: + self.assertEqual(str(e), "(3,)") + + def test_bad_exception_clearing(self): + # See issue 16445: use of Py_XDECREF instead of Py_CLEAR in + # BaseException_set_message gave a possible way to segfault the + # interpreter. + class Nasty(str): + def __del__(message): + del e.message + + e = ValueError(Nasty("msg")) + e.args = () + del e.message + + +# Helper class used by TestSameStrAndUnicodeMsg +class ExcWithOverriddenStr(Exception): + """Subclass of Exception that accepts a keyword 'msg' arg that is + returned by __str__. 'msg' won't be included in self.args""" + def __init__(self, *args, **kwargs): + self.msg = kwargs.pop('msg') # msg should always be present + super(ExcWithOverriddenStr, self).__init__(*args, **kwargs) + def __str__(self): + return self.msg + + +class TestSameStrAndUnicodeMsg(unittest.TestCase): + """unicode(err) should return the same message of str(err). See #6108""" + + def check_same_msg(self, exc, msg): + """Helper function that checks if str(exc) == unicode(exc) == msg""" + self.assertEqual(str(exc), msg) + self.assertEqual(str(exc), unicode(exc)) + + def test_builtin_exceptions(self): + """Check same msg for built-in exceptions""" + # These exceptions implement a __str__ method that uses the args + # to create a better error message. unicode(e) should return the same + # message. + exceptions = [ + SyntaxError('invalid syntax', ('<string>', 1, 3, '2+*3')), + IOError(2, 'No such file or directory'), + KeyError('both should have the same quotes'), + UnicodeDecodeError('ascii', '\xc3\xa0', 0, 1, + 'ordinal not in range(128)'), + UnicodeEncodeError('ascii', u'\u1234', 0, 1, + 'ordinal not in range(128)') + ] + for exception in exceptions: + self.assertEqual(str(exception), unicode(exception)) + + def test_0_args(self): + """Check same msg for Exception with 0 args""" + # str() and unicode() on an Exception with no args should return an + # empty string + self.check_same_msg(Exception(), '') + + def test_0_args_with_overridden___str__(self): + """Check same msg for exceptions with 0 args and overridden __str__""" + # str() and unicode() on an exception with overridden __str__ that + # returns an ascii-only string should return the same string + for msg in ('foo', u'foo'): + self.check_same_msg(ExcWithOverriddenStr(msg=msg), msg) + + # if __str__ returns a non-ascii unicode string str() should fail + # but unicode() should return the unicode string + e = ExcWithOverriddenStr(msg=u'f\xf6\xf6') # no args + self.assertRaises(UnicodeEncodeError, str, e) + self.assertEqual(unicode(e), u'f\xf6\xf6') + + def test_1_arg(self): + """Check same msg for Exceptions with 1 arg""" + for arg in ('foo', u'foo'): + self.check_same_msg(Exception(arg), arg) + + # if __str__ is not overridden and self.args[0] is a non-ascii unicode + # string, str() should try to return str(self.args[0]) and fail. + # unicode() should return unicode(self.args[0]) and succeed. + e = Exception(u'f\xf6\xf6') + self.assertRaises(UnicodeEncodeError, str, e) + self.assertEqual(unicode(e), u'f\xf6\xf6') + + def test_1_arg_with_overridden___str__(self): + """Check same msg for exceptions with overridden __str__ and 1 arg""" + # when __str__ is overridden and __unicode__ is not implemented + # unicode(e) returns the same as unicode(e.__str__()). + for msg in ('foo', u'foo'): + self.check_same_msg(ExcWithOverriddenStr('arg', msg=msg), msg) + + # if __str__ returns a non-ascii unicode string, str() should fail + # but unicode() should succeed. + e = ExcWithOverriddenStr('arg', msg=u'f\xf6\xf6') # 1 arg + self.assertRaises(UnicodeEncodeError, str, e) + self.assertEqual(unicode(e), u'f\xf6\xf6') + + def test_many_args(self): + """Check same msg for Exceptions with many args""" + argslist = [ + (3, 'foo'), + (1, u'foo', 'bar'), + (4, u'f\xf6\xf6', u'bar', 'baz') + ] + # both str() and unicode() should return a repr() of the args + for args in argslist: + self.check_same_msg(Exception(*args), repr(args)) + + def test_many_args_with_overridden___str__(self): + """Check same msg for exceptions with overridden __str__ and many args""" + # if __str__ returns an ascii string / ascii unicode string + # both str() and unicode() should succeed + for msg in ('foo', u'foo'): + e = ExcWithOverriddenStr('arg1', u'arg2', u'f\xf6\xf6', msg=msg) + self.check_same_msg(e, msg) + + # if __str__ returns a non-ascii unicode string, str() should fail + # but unicode() should succeed + e = ExcWithOverriddenStr('arg1', u'f\xf6\xf6', u'arg3', # 3 args + msg=u'f\xf6\xf6') + self.assertRaises(UnicodeEncodeError, str, e) + self.assertEqual(unicode(e), u'f\xf6\xf6') @cpython_only def test_exception_with_doc(self): @@ -1128,256 +649,65 @@ class ExceptionTests(unittest.TestCase): 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: + # In Python 3, the following line would be in the report: raise exc - obj = BrokenDel() - with support.catch_unraisable_exception() as cm: - del obj + class BrokenRepr(BrokenDel): + def __repr__(self): + raise AttributeError("repr() is broken") + + class BrokenExceptionDel: + def __del__(self): + exc = BrokenStrException() + # In Python 3, the following line would be in the report: + raise exc - self.assertEqual(cm.unraisable.object, BrokenDel.__del__) - self.assertIsNotNone(cm.unraisable.exc_traceback) + for test_class in (BrokenDel, BrokenRepr, BrokenExceptionDel): + obj = test_class() + with captured_stderr() as stderr: + del obj + report = stderr.getvalue() + self.assertRegexpMatches(report, "Exception.* ignored") + if test_class is BrokenRepr: + self.assertIn("<object repr() failed>", report) + else: + self.assertIn("__del__", report) + if test_class is BrokenExceptionDel: + self.assertIn("BrokenStrException", report) + self.assertIn("<exception repr() failed>", report) + else: + self.assertIn("ValueError", report) + self.assertIn("del is broken", report) + self.assertTrue(report.endswith("\n")) 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 + 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")) - 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') - - -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) +def test_main(): + run_unittest(ExceptionTests, TestSameStrAndUnicodeMsg) if __name__ == '__main__': - unittest.main() + test_main() |