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2554 lines
86 KiB
Python
2554 lines
86 KiB
Python
# Python test set -- part 5, built-in exceptions
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import copy
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import os
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import sys
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import unittest
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import pickle
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import weakref
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import errno
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from codecs import BOM_UTF8
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from itertools import product
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from textwrap import dedent
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from test.support import (captured_stderr, check_impl_detail,
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cpython_only, gc_collect,
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no_tracing, script_helper,
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SuppressCrashReport,
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force_not_colorized)
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from test.support.import_helper import import_module
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from test.support.os_helper import TESTFN, unlink
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from test.support.warnings_helper import check_warnings
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from test import support
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try:
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import _testcapi
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from _testcapi import INT_MAX
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except ImportError:
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_testcapi = None
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INT_MAX = 2**31 - 1
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class NaiveException(Exception):
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def __init__(self, x):
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self.x = x
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class SlottedNaiveException(Exception):
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__slots__ = ('x',)
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def __init__(self, x):
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self.x = x
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class BrokenStrException(Exception):
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def __str__(self):
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raise Exception("str() is broken")
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# XXX This is not really enough, each *operation* should be tested!
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class ExceptionTests(unittest.TestCase):
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def raise_catch(self, exc, excname):
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with self.subTest(exc=exc, excname=excname):
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try:
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raise exc("spam")
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except exc as err:
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buf1 = str(err)
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try:
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raise exc("spam")
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except exc as err:
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buf2 = str(err)
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self.assertEqual(buf1, buf2)
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self.assertEqual(exc.__name__, excname)
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def testRaising(self):
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self.raise_catch(AttributeError, "AttributeError")
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self.assertRaises(AttributeError, getattr, sys, "undefined_attribute")
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self.raise_catch(EOFError, "EOFError")
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fp = open(TESTFN, 'w', encoding="utf-8")
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fp.close()
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fp = open(TESTFN, 'r', encoding="utf-8")
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savestdin = sys.stdin
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try:
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try:
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import marshal
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marshal.loads(b'')
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except EOFError:
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pass
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finally:
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sys.stdin = savestdin
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fp.close()
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unlink(TESTFN)
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self.raise_catch(OSError, "OSError")
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self.assertRaises(OSError, open, 'this file does not exist', 'r')
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self.raise_catch(ImportError, "ImportError")
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self.assertRaises(ImportError, __import__, "undefined_module")
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self.raise_catch(IndexError, "IndexError")
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x = []
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self.assertRaises(IndexError, x.__getitem__, 10)
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self.raise_catch(KeyError, "KeyError")
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x = {}
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self.assertRaises(KeyError, x.__getitem__, 'key')
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self.raise_catch(KeyboardInterrupt, "KeyboardInterrupt")
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self.raise_catch(MemoryError, "MemoryError")
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self.raise_catch(NameError, "NameError")
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try: x = undefined_variable
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except NameError: pass
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self.raise_catch(OverflowError, "OverflowError")
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x = 1
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for dummy in range(128):
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x += x # this simply shouldn't blow up
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self.raise_catch(RuntimeError, "RuntimeError")
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self.raise_catch(RecursionError, "RecursionError")
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self.raise_catch(SyntaxError, "SyntaxError")
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try: exec('/\n')
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except SyntaxError: pass
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self.raise_catch(IndentationError, "IndentationError")
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self.raise_catch(TabError, "TabError")
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try: compile("try:\n\t1/0\n \t1/0\nfinally:\n pass\n",
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'<string>', 'exec')
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except TabError: pass
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else: self.fail("TabError not raised")
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self.raise_catch(SystemError, "SystemError")
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self.raise_catch(SystemExit, "SystemExit")
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self.assertRaises(SystemExit, sys.exit, 0)
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self.raise_catch(TypeError, "TypeError")
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try: [] + ()
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except TypeError: pass
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self.raise_catch(ValueError, "ValueError")
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self.assertRaises(ValueError, chr, 17<<16)
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self.raise_catch(ZeroDivisionError, "ZeroDivisionError")
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try: x = 1/0
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except ZeroDivisionError: pass
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self.raise_catch(Exception, "Exception")
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try: x = 1/0
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except Exception as e: pass
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self.raise_catch(StopAsyncIteration, "StopAsyncIteration")
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def testSyntaxErrorMessage(self):
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# make sure the right exception message is raised for each of
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# these code fragments
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def ckmsg(src, msg):
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with self.subTest(src=src, msg=msg):
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try:
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compile(src, '<fragment>', 'exec')
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except SyntaxError as e:
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if e.msg != msg:
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self.fail("expected %s, got %s" % (msg, e.msg))
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else:
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self.fail("failed to get expected SyntaxError")
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s = '''if 1:
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try:
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continue
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except:
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pass'''
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ckmsg(s, "'continue' not properly in loop")
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ckmsg("continue\n", "'continue' not properly in loop")
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ckmsg("f'{6 0}'", "invalid syntax. Perhaps you forgot a comma?")
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def testSyntaxErrorMissingParens(self):
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def ckmsg(src, msg, exception=SyntaxError):
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try:
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compile(src, '<fragment>', 'exec')
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except exception as e:
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if e.msg != msg:
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self.fail("expected %s, got %s" % (msg, e.msg))
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else:
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self.fail("failed to get expected SyntaxError")
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s = '''print "old style"'''
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ckmsg(s, "Missing parentheses in call to 'print'. Did you mean print(...)?")
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s = '''print "old style",'''
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ckmsg(s, "Missing parentheses in call to 'print'. Did you mean print(...)?")
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s = 'print f(a+b,c)'
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ckmsg(s, "Missing parentheses in call to 'print'. Did you mean print(...)?")
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s = '''exec "old style"'''
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ckmsg(s, "Missing parentheses in call to 'exec'. Did you mean exec(...)?")
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s = 'exec f(a+b,c)'
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ckmsg(s, "Missing parentheses in call to 'exec'. Did you mean exec(...)?")
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# Check that we don't incorrectly identify '(...)' as an expression to the right
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# of 'print'
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s = 'print (a+b,c) $ 42'
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ckmsg(s, "invalid syntax")
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s = 'exec (a+b,c) $ 42'
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ckmsg(s, "invalid syntax")
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# should not apply to subclasses, see issue #31161
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s = '''if True:\nprint "No indent"'''
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ckmsg(s, "expected an indented block after 'if' statement on line 1", IndentationError)
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s = '''if True:\n print()\n\texec "mixed tabs and spaces"'''
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ckmsg(s, "inconsistent use of tabs and spaces in indentation", TabError)
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def check(self, src, lineno, offset, end_lineno=None, end_offset=None, encoding='utf-8'):
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with self.subTest(source=src, lineno=lineno, offset=offset):
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with self.assertRaises(SyntaxError) as cm:
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compile(src, '<fragment>', 'exec')
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self.assertEqual(cm.exception.lineno, lineno)
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self.assertEqual(cm.exception.offset, offset)
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if end_lineno is not None:
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self.assertEqual(cm.exception.end_lineno, end_lineno)
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if end_offset is not None:
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self.assertEqual(cm.exception.end_offset, end_offset)
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if cm.exception.text is not None:
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if not isinstance(src, str):
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src = src.decode(encoding, 'replace')
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line = src.split('\n')[lineno-1]
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self.assertIn(line, cm.exception.text)
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def test_error_offset_continuation_characters(self):
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check = self.check
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check('"\\\n"(1 for c in I,\\\n\\', 2, 2)
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def testSyntaxErrorOffset(self):
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check = self.check
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check('def fact(x):\n\treturn x!\n', 2, 10)
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check('1 +\n', 1, 4)
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check('def spam():\n print(1)\n print(2)', 3, 10)
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check('Python = "Python" +', 1, 20)
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check('Python = "\u1e54\xfd\u0163\u0125\xf2\xf1" +', 1, 20)
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check(b'# -*- coding: cp1251 -*-\nPython = "\xcf\xb3\xf2\xee\xed" +',
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2, 19, encoding='cp1251')
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check(b'Python = "\xcf\xb3\xf2\xee\xed" +', 1, 10)
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check('x = "a', 1, 5)
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check('lambda x: x = 2', 1, 1)
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check('f{a + b + c}', 1, 2)
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check('[file for str(file) in []\n]', 1, 11)
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check('a = « hello » « world »', 1, 5)
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check('[\nfile\nfor str(file)\nin\n[]\n]', 3, 5)
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check('[file for\n str(file) in []]', 2, 2)
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check("ages = {'Alice'=22, 'Bob'=23}", 1, 9)
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check('match ...:\n case {**rest, "key": value}:\n ...', 2, 19)
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check("[a b c d e f]", 1, 2)
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check("for x yfff:", 1, 7)
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check("f(a for a in b, c)", 1, 3, 1, 15)
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check("f(a for a in b if a, c)", 1, 3, 1, 20)
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check("f(a, b for b in c)", 1, 6, 1, 18)
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check("f(a, b for b in c, d)", 1, 6, 1, 18)
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# Errors thrown by compile.c
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check('class foo:return 1', 1, 11)
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check('def f():\n continue', 2, 3)
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check('def f():\n break', 2, 3)
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check('try:\n pass\nexcept:\n pass\nexcept ValueError:\n pass', 3, 1)
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check('try:\n pass\nexcept*:\n pass', 3, 8)
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check('try:\n pass\nexcept*:\n pass\nexcept* ValueError:\n pass', 3, 8)
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# Errors thrown by the tokenizer
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check('(0x+1)', 1, 3)
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check('x = 0xI', 1, 6)
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check('0010 + 2', 1, 1)
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check('x = 32e-+4', 1, 8)
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check('x = 0o9', 1, 7)
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check('\u03b1 = 0xI', 1, 6)
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check(b'\xce\xb1 = 0xI', 1, 6)
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check(b'# -*- coding: iso8859-7 -*-\n\xe1 = 0xI', 2, 6,
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encoding='iso8859-7')
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check(b"""if 1:
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def foo():
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'''
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def bar():
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pass
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def baz():
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'''quux'''
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""", 9, 24)
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check("pass\npass\npass\n(1+)\npass\npass\npass", 4, 4)
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check("(1+)", 1, 4)
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check("[interesting\nfoo()\n", 1, 1)
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check(b"\xef\xbb\xbf#coding: utf8\nprint('\xe6\x88\x91')\n", 0, -1)
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check("""f'''
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{
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(123_a)
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}'''""", 3, 17)
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check("""f'''
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{
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f\"\"\"
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{
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(123_a)
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}
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\"\"\"
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}'''""", 5, 17)
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check('''f"""
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{
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6
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0="""''', 5, 13)
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check('b"fooжжж"'.encode(), 1, 1, 1, 10)
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# Errors thrown by symtable.c
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check('x = [(yield i) for i in range(3)]', 1, 7)
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check('def f():\n from _ import *', 2, 17)
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check('def f(x, x):\n pass', 1, 10)
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check('{i for i in range(5) if (j := 0) for j in range(5)}', 1, 38)
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check('def f(x):\n nonlocal x', 2, 3)
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check('def f(x):\n x = 1\n global x', 3, 3)
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check('nonlocal x', 1, 1)
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check('def f():\n global x\n nonlocal x', 2, 3)
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# Errors thrown by future.c
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check('from __future__ import doesnt_exist', 1, 24)
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check('from __future__ import braces', 1, 24)
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check('x=1\nfrom __future__ import division', 2, 1)
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check('foo(1=2)', 1, 5)
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check('def f():\n x, y: int', 2, 3)
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check('[*x for x in xs]', 1, 2)
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check('foo(x for x in range(10), 100)', 1, 5)
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check('for 1 in []: pass', 1, 5)
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check('(yield i) = 2', 1, 2)
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check('def f(*):\n pass', 1, 7)
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@unittest.skipIf(INT_MAX >= sys.maxsize, "Downcasting to int is safe for col_offset")
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@support.requires_resource('cpu')
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@support.bigmemtest(INT_MAX, memuse=2, dry_run=False)
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def testMemoryErrorBigSource(self, size):
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src = b"if True:\n%*s" % (size, b"pass")
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with self.assertRaisesRegex(OverflowError, "Parser column offset overflow"):
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compile(src, '<fragment>', 'exec')
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@cpython_only
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def testSettingException(self):
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# test that setting an exception at the C level works even if the
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# exception object can't be constructed.
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class BadException(Exception):
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def __init__(self_):
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raise RuntimeError("can't instantiate BadException")
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class InvalidException:
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pass
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@unittest.skipIf(_testcapi is None, "requires _testcapi")
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def test_capi1():
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try:
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_testcapi.raise_exception(BadException, 1)
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except TypeError as err:
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co = err.__traceback__.tb_frame.f_code
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self.assertEqual(co.co_name, "test_capi1")
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self.assertTrue(co.co_filename.endswith('test_exceptions.py'))
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else:
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self.fail("Expected exception")
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@unittest.skipIf(_testcapi is None, "requires _testcapi")
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def test_capi2():
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try:
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_testcapi.raise_exception(BadException, 0)
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except RuntimeError as err:
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tb = err.__traceback__.tb_next
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co = tb.tb_frame.f_code
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self.assertEqual(co.co_name, "__init__")
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self.assertTrue(co.co_filename.endswith('test_exceptions.py'))
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co2 = tb.tb_frame.f_back.f_code
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self.assertEqual(co2.co_name, "test_capi2")
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else:
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self.fail("Expected exception")
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@unittest.skipIf(_testcapi is None, "requires _testcapi")
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def test_capi3():
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self.assertRaises(SystemError, _testcapi.raise_exception,
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InvalidException, 1)
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test_capi1()
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test_capi2()
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test_capi3()
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def test_WindowsError(self):
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try:
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WindowsError
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except NameError:
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pass
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else:
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self.assertIs(WindowsError, OSError)
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self.assertEqual(str(OSError(1001)), "1001")
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self.assertEqual(str(OSError(1001, "message")),
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"[Errno 1001] message")
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# POSIX errno (9 aka EBADF) is untranslated
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w = OSError(9, 'foo', 'bar')
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self.assertEqual(w.errno, 9)
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self.assertEqual(w.winerror, None)
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self.assertEqual(str(w), "[Errno 9] foo: 'bar'")
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# ERROR_PATH_NOT_FOUND (win error 3) becomes ENOENT (2)
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w = OSError(0, 'foo', 'bar', 3)
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self.assertEqual(w.errno, 2)
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self.assertEqual(w.winerror, 3)
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self.assertEqual(w.strerror, 'foo')
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self.assertEqual(w.filename, 'bar')
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self.assertEqual(w.filename2, None)
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self.assertEqual(str(w), "[WinError 3] foo: 'bar'")
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# Unknown win error becomes EINVAL (22)
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w = OSError(0, 'foo', None, 1001)
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self.assertEqual(w.errno, 22)
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self.assertEqual(w.winerror, 1001)
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self.assertEqual(w.strerror, 'foo')
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self.assertEqual(w.filename, None)
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self.assertEqual(w.filename2, None)
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self.assertEqual(str(w), "[WinError 1001] foo")
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# Non-numeric "errno"
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w = OSError('bar', 'foo')
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self.assertEqual(w.errno, 'bar')
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self.assertEqual(w.winerror, None)
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self.assertEqual(w.strerror, 'foo')
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self.assertEqual(w.filename, None)
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self.assertEqual(w.filename2, None)
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|
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@unittest.skipUnless(sys.platform == 'win32',
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'test specific to Windows')
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def test_windows_message(self):
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"""Should fill in unknown error code in Windows error message"""
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ctypes = import_module('ctypes')
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# this error code has no message, Python formats it as hexadecimal
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code = 3765269347
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with self.assertRaisesRegex(OSError, 'Windows Error 0x%x' % code):
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ctypes.pythonapi.PyErr_SetFromWindowsErr(code)
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def testAttributes(self):
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# test that exception attributes are happy
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exceptionList = [
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(BaseException, (), {}, {'args' : ()}),
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(BaseException, (1, ), {}, {'args' : (1,)}),
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(BaseException, ('foo',), {},
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{'args' : ('foo',)}),
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(BaseException, ('foo', 1), {},
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{'args' : ('foo', 1)}),
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(SystemExit, ('foo',), {},
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{'args' : ('foo',), 'code' : 'foo'}),
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(OSError, ('foo',), {},
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{'args' : ('foo',), 'filename' : None, 'filename2' : None,
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'errno' : None, 'strerror' : None}),
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(OSError, ('foo', 'bar'), {},
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{'args' : ('foo', 'bar'),
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'filename' : None, 'filename2' : None,
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'errno' : 'foo', 'strerror' : 'bar'}),
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(OSError, ('foo', 'bar', 'baz'), {},
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{'args' : ('foo', 'bar'),
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'filename' : 'baz', 'filename2' : None,
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'errno' : 'foo', 'strerror' : 'bar'}),
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(OSError, ('foo', 'bar', 'baz', None, 'quux'), {},
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{'args' : ('foo', 'bar'), 'filename' : 'baz', 'filename2': 'quux'}),
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(OSError, ('errnoStr', 'strErrorStr', 'filenameStr'), {},
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{'args' : ('errnoStr', 'strErrorStr'),
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'strerror' : 'strErrorStr', 'errno' : 'errnoStr',
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'filename' : 'filenameStr'}),
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(OSError, (1, 'strErrorStr', 'filenameStr'), {},
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{'args' : (1, 'strErrorStr'), 'errno' : 1,
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'strerror' : 'strErrorStr',
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|
'filename' : 'filenameStr', 'filename2' : None}),
|
|
(SyntaxError, (), {}, {'msg' : None, 'text' : None,
|
|
'filename' : None, 'lineno' : None, 'offset' : None,
|
|
'end_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,
|
|
'end_offset': None}),
|
|
(SyntaxError, ('msgStr', ('filenameStr', 'linenoStr', 'offsetStr',
|
|
'textStr', 'endLinenoStr', 'endOffsetStr')), {},
|
|
{'offset' : 'offsetStr', 'text' : 'textStr',
|
|
'args' : ('msgStr', ('filenameStr', 'linenoStr',
|
|
'offsetStr', 'textStr',
|
|
'endLinenoStr', 'endOffsetStr')),
|
|
'print_file_and_line' : None, 'msg' : 'msgStr',
|
|
'filename' : 'filenameStr', 'lineno' : 'linenoStr',
|
|
'end_lineno': 'endLinenoStr', 'end_offset': 'endOffsetStr'}),
|
|
(SyntaxError, ('msgStr', 'filenameStr', 'linenoStr', 'offsetStr',
|
|
'textStr', 'endLinenoStr', 'endOffsetStr',
|
|
'print_file_and_lineStr'), {},
|
|
{'text' : None,
|
|
'args' : ('msgStr', 'filenameStr', 'linenoStr', 'offsetStr',
|
|
'textStr', 'endLinenoStr', 'endOffsetStr',
|
|
'print_file_and_lineStr'),
|
|
'print_file_and_line' : None, 'msg' : 'msgStr',
|
|
'filename' : None, 'lineno' : None, 'offset' : None,
|
|
'end_lineno': None, 'end_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'}),
|
|
(AttributeError, ('foo',), dict(name='name', obj='obj'),
|
|
dict(args=('foo',), name='name', obj='obj')),
|
|
]
|
|
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, kwargs, expected in exceptionList:
|
|
try:
|
|
e = exc(*args, **kwargs)
|
|
except:
|
|
print(f"\nexc={exc!r}, args={args!r}", 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))
|
|
if exc == AttributeError and checkArgName == 'obj':
|
|
# See GH-103352, we're not pickling
|
|
# obj at this point. So verify it's None.
|
|
want = repr(None)
|
|
else:
|
|
want = repr(expected[checkArgName])
|
|
self.assertEqual(got, want,
|
|
'pickled "%r", attribute "%s' %
|
|
(e, checkArgName))
|
|
|
|
def test_setstate(self):
|
|
e = Exception(42)
|
|
e.blah = 53
|
|
self.assertEqual(e.args, (42,))
|
|
self.assertEqual(e.blah, 53)
|
|
self.assertRaises(AttributeError, getattr, e, 'a')
|
|
self.assertRaises(AttributeError, getattr, e, 'b')
|
|
e.__setstate__({'a': 1 , 'b': 2})
|
|
self.assertEqual(e.args, (42,))
|
|
self.assertEqual(e.blah, 53)
|
|
self.assertEqual(e.a, 1)
|
|
self.assertEqual(e.b, 2)
|
|
e.__setstate__({'a': 11, 'args': (1,2,3), 'blah': 35})
|
|
self.assertEqual(e.args, (1,2,3))
|
|
self.assertEqual(e.blah, 35)
|
|
self.assertEqual(e.a, 11)
|
|
self.assertEqual(e.b, 2)
|
|
|
|
def test_invalid_setstate(self):
|
|
e = Exception(42)
|
|
with self.assertRaisesRegex(TypeError, "state is not a dictionary"):
|
|
e.__setstate__(42)
|
|
|
|
def test_notes(self):
|
|
for e in [BaseException(1), Exception(2), ValueError(3)]:
|
|
with self.subTest(e=e):
|
|
self.assertFalse(hasattr(e, '__notes__'))
|
|
e.add_note("My Note")
|
|
self.assertEqual(e.__notes__, ["My Note"])
|
|
|
|
with self.assertRaises(TypeError):
|
|
e.add_note(42)
|
|
self.assertEqual(e.__notes__, ["My Note"])
|
|
|
|
e.add_note("Your Note")
|
|
self.assertEqual(e.__notes__, ["My Note", "Your Note"])
|
|
|
|
del e.__notes__
|
|
self.assertFalse(hasattr(e, '__notes__'))
|
|
|
|
e.add_note("Our Note")
|
|
self.assertEqual(e.__notes__, ["Our Note"])
|
|
|
|
e.__notes__ = 42
|
|
self.assertEqual(e.__notes__, 42)
|
|
|
|
with self.assertRaises(TypeError):
|
|
e.add_note("will not work")
|
|
self.assertEqual(e.__notes__, 42)
|
|
|
|
def testWithTraceback(self):
|
|
try:
|
|
raise IndexError(4)
|
|
except Exception as e:
|
|
tb = e.__traceback__
|
|
|
|
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 test_invalid_setattr(self):
|
|
TE = TypeError
|
|
exc = Exception()
|
|
msg = "'int' object is not iterable"
|
|
self.assertRaisesRegex(TE, msg, setattr, exc, 'args', 1)
|
|
msg = "__traceback__ must be a traceback or None"
|
|
self.assertRaisesRegex(TE, msg, setattr, exc, '__traceback__', 1)
|
|
msg = "exception cause must be None or derive from BaseException"
|
|
self.assertRaisesRegex(TE, msg, setattr, exc, '__cause__', 1)
|
|
msg = "exception context must be None or derive from BaseException"
|
|
self.assertRaisesRegex(TE, msg, setattr, exc, '__context__', 1)
|
|
|
|
def test_invalid_delattr(self):
|
|
TE = TypeError
|
|
try:
|
|
raise IndexError(4)
|
|
except Exception as e:
|
|
exc = e
|
|
|
|
msg = "may not be deleted"
|
|
self.assertRaisesRegex(TE, msg, delattr, exc, 'args')
|
|
self.assertRaisesRegex(TE, msg, delattr, exc, '__traceback__')
|
|
self.assertRaisesRegex(TE, msg, delattr, exc, '__cause__')
|
|
self.assertRaisesRegex(TE, msg, delattr, exc, '__context__')
|
|
|
|
def testNoneClearsTracebackAttr(self):
|
|
try:
|
|
raise IndexError(4)
|
|
except Exception as e:
|
|
tb = e.__traceback__
|
|
|
|
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 test_exception_cleanup_names(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.assertIsInstance(e, Exception)
|
|
self.assertNotIn('e', locals())
|
|
with self.assertRaises(UnboundLocalError):
|
|
e
|
|
|
|
def test_exception_cleanup_names2(self):
|
|
# Make sure the cleanup doesn't break if the variable is explicitly deleted.
|
|
try:
|
|
raise Exception()
|
|
except Exception as e:
|
|
self.assertIsInstance(e, Exception)
|
|
del e
|
|
self.assertNotIn('e', locals())
|
|
with self.assertRaises(UnboundLocalError):
|
|
e
|
|
|
|
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
|
|
gc_collect() # For PyPy or other GCs.
|
|
obj = wr()
|
|
self.assertIsNone(obj)
|
|
|
|
# Qualified "except" without "as"
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
try:
|
|
inner_raising_func()
|
|
except MyException:
|
|
pass
|
|
obj = None
|
|
gc_collect() # For PyPy or other GCs.
|
|
obj = wr()
|
|
self.assertIsNone(obj)
|
|
|
|
# Bare "except"
|
|
obj = MyObj()
|
|
wr = weakref.ref(obj)
|
|
try:
|
|
inner_raising_func()
|
|
except:
|
|
pass
|
|
obj = None
|
|
gc_collect() # For PyPy or other GCs.
|
|
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
|
|
gc_collect() # For PyPy or other GCs.
|
|
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
|
|
gc_collect() # For PyPy or other GCs.
|
|
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.exception()
|
|
yield sys.exception()
|
|
yield sys.exception()
|
|
g = yield_raise()
|
|
self.assertIsInstance(next(g), KeyError)
|
|
self.assertIsNone(sys.exception())
|
|
self.assertIsInstance(next(g), KeyError)
|
|
self.assertIsNone(sys.exception())
|
|
self.assertIsNone(next(g))
|
|
|
|
# Same test, but inside an exception handler
|
|
try:
|
|
raise TypeError("foo")
|
|
except TypeError:
|
|
g = yield_raise()
|
|
self.assertIsInstance(next(g), KeyError)
|
|
self.assertIsInstance(sys.exception(), TypeError)
|
|
self.assertIsInstance(next(g), KeyError)
|
|
self.assertIsInstance(sys.exception(), TypeError)
|
|
self.assertIsInstance(next(g), TypeError)
|
|
del g
|
|
self.assertIsInstance(sys.exception(), 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.assertIsNone(sys.exception())
|
|
|
|
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.exception()
|
|
it = g()
|
|
next(it)
|
|
try:
|
|
1/0
|
|
except ZeroDivisionError as e:
|
|
self.assertIs(sys.exception(), e)
|
|
gen_exc = it.throw(e)
|
|
self.assertIs(sys.exception(), e)
|
|
self.assertIs(gen_exc, e)
|
|
self.assertIsNone(sys.exception())
|
|
|
|
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.exception()
|
|
raise
|
|
it = g()
|
|
try:
|
|
raise TypeError
|
|
except TypeError:
|
|
# The caller's exception state (TypeError) is temporarily
|
|
# saved in the generator.
|
|
tp = type(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.exception(), e)
|
|
# We used to find TypeError here.
|
|
self.assertIsNone(sys.exception())
|
|
|
|
def test_generator_doesnt_retain_old_exc(self):
|
|
def g():
|
|
self.assertIsInstance(sys.exception(), RuntimeError)
|
|
yield
|
|
self.assertIsNone(sys.exception())
|
|
it = g()
|
|
try:
|
|
raise RuntimeError
|
|
except RuntimeError:
|
|
next(it)
|
|
self.assertRaises(StopIteration, next, it)
|
|
|
|
def test_generator_finalizing_and_sys_exception(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.assertIsNone(sys.exception())
|
|
|
|
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
|
|
gc_collect() # For PyPy or other GCs.
|
|
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.exception()
|
|
e = ()
|
|
try:
|
|
raise Exception(MyObject())
|
|
except:
|
|
pass
|
|
gc_collect() # For PyPy or other GCs.
|
|
self.assertIsNone(e)
|
|
|
|
def test_raise_does_not_create_context_chain_cycle(self):
|
|
class A(Exception):
|
|
pass
|
|
class B(Exception):
|
|
pass
|
|
class C(Exception):
|
|
pass
|
|
|
|
# Create a context chain:
|
|
# C -> B -> A
|
|
# Then raise A in context of C.
|
|
try:
|
|
try:
|
|
raise A
|
|
except A as a_:
|
|
a = a_
|
|
try:
|
|
raise B
|
|
except B as b_:
|
|
b = b_
|
|
try:
|
|
raise C
|
|
except C as c_:
|
|
c = c_
|
|
self.assertIsInstance(a, A)
|
|
self.assertIsInstance(b, B)
|
|
self.assertIsInstance(c, C)
|
|
self.assertIsNone(a.__context__)
|
|
self.assertIs(b.__context__, a)
|
|
self.assertIs(c.__context__, b)
|
|
raise a
|
|
except A as e:
|
|
exc = e
|
|
|
|
# Expect A -> C -> B, without cycle
|
|
self.assertIs(exc, a)
|
|
self.assertIs(a.__context__, c)
|
|
self.assertIs(c.__context__, b)
|
|
self.assertIsNone(b.__context__)
|
|
|
|
def test_no_hang_on_context_chain_cycle1(self):
|
|
# See issue 25782. Cycle in context chain.
|
|
|
|
def cycle():
|
|
try:
|
|
raise ValueError(1)
|
|
except ValueError as ex:
|
|
ex.__context__ = ex
|
|
raise TypeError(2)
|
|
|
|
try:
|
|
cycle()
|
|
except Exception as e:
|
|
exc = e
|
|
|
|
self.assertIsInstance(exc, TypeError)
|
|
self.assertIsInstance(exc.__context__, ValueError)
|
|
self.assertIs(exc.__context__.__context__, exc.__context__)
|
|
|
|
def test_no_hang_on_context_chain_cycle2(self):
|
|
# See issue 25782. Cycle at head of context chain.
|
|
|
|
class A(Exception):
|
|
pass
|
|
class B(Exception):
|
|
pass
|
|
class C(Exception):
|
|
pass
|
|
|
|
# Context cycle:
|
|
# +-----------+
|
|
# V |
|
|
# C --> B --> A
|
|
with self.assertRaises(C) as cm:
|
|
try:
|
|
raise A()
|
|
except A as _a:
|
|
a = _a
|
|
try:
|
|
raise B()
|
|
except B as _b:
|
|
b = _b
|
|
try:
|
|
raise C()
|
|
except C as _c:
|
|
c = _c
|
|
a.__context__ = c
|
|
raise c
|
|
|
|
self.assertIs(cm.exception, c)
|
|
# Verify the expected context chain cycle
|
|
self.assertIs(c.__context__, b)
|
|
self.assertIs(b.__context__, a)
|
|
self.assertIs(a.__context__, c)
|
|
|
|
def test_no_hang_on_context_chain_cycle3(self):
|
|
# See issue 25782. Longer context chain with cycle.
|
|
|
|
class A(Exception):
|
|
pass
|
|
class B(Exception):
|
|
pass
|
|
class C(Exception):
|
|
pass
|
|
class D(Exception):
|
|
pass
|
|
class E(Exception):
|
|
pass
|
|
|
|
# Context cycle:
|
|
# +-----------+
|
|
# V |
|
|
# E --> D --> C --> B --> A
|
|
with self.assertRaises(E) as cm:
|
|
try:
|
|
raise A()
|
|
except A as _a:
|
|
a = _a
|
|
try:
|
|
raise B()
|
|
except B as _b:
|
|
b = _b
|
|
try:
|
|
raise C()
|
|
except C as _c:
|
|
c = _c
|
|
a.__context__ = c
|
|
try:
|
|
raise D()
|
|
except D as _d:
|
|
d = _d
|
|
e = E()
|
|
raise e
|
|
|
|
self.assertIs(cm.exception, e)
|
|
# Verify the expected context chain cycle
|
|
self.assertIs(e.__context__, d)
|
|
self.assertIs(d.__context__, c)
|
|
self.assertIs(c.__context__, b)
|
|
self.assertIs(b.__context__, a)
|
|
self.assertIs(a.__context__, c)
|
|
|
|
def test_context_of_exception_in_try_and_finally(self):
|
|
try:
|
|
try:
|
|
te = TypeError(1)
|
|
raise te
|
|
finally:
|
|
ve = ValueError(2)
|
|
raise ve
|
|
except Exception as e:
|
|
exc = e
|
|
|
|
self.assertIs(exc, ve)
|
|
self.assertIs(exc.__context__, te)
|
|
|
|
def test_context_of_exception_in_except_and_finally(self):
|
|
try:
|
|
try:
|
|
te = TypeError(1)
|
|
raise te
|
|
except:
|
|
ve = ValueError(2)
|
|
raise ve
|
|
finally:
|
|
oe = OSError(3)
|
|
raise oe
|
|
except Exception as e:
|
|
exc = e
|
|
|
|
self.assertIs(exc, oe)
|
|
self.assertIs(exc.__context__, ve)
|
|
self.assertIs(exc.__context__.__context__, te)
|
|
|
|
def test_context_of_exception_in_else_and_finally(self):
|
|
try:
|
|
try:
|
|
pass
|
|
except:
|
|
pass
|
|
else:
|
|
ve = ValueError(1)
|
|
raise ve
|
|
finally:
|
|
oe = OSError(2)
|
|
raise oe
|
|
except Exception as e:
|
|
exc = e
|
|
|
|
self.assertIs(exc, oe)
|
|
self.assertIs(exc.__context__, ve)
|
|
|
|
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)), "")
|
|
|
|
def test_unicode_error_str_does_not_crash(self):
|
|
# Test that str(UnicodeError(...)) does not crash.
|
|
# See https://github.com/python/cpython/issues/123378.
|
|
|
|
for start, end, objlen in product(
|
|
range(-5, 5),
|
|
range(-5, 5),
|
|
range(7),
|
|
):
|
|
obj = 'a' * objlen
|
|
with self.subTest('encode', objlen=objlen, start=start, end=end):
|
|
exc = UnicodeEncodeError('utf-8', obj, start, end, '')
|
|
self.assertIsInstance(str(exc), str)
|
|
|
|
with self.subTest('translate', objlen=objlen, start=start, end=end):
|
|
exc = UnicodeTranslateError(obj, start, end, '')
|
|
self.assertIsInstance(str(exc), str)
|
|
|
|
encoded = obj.encode()
|
|
with self.subTest('decode', objlen=objlen, start=start, end=end):
|
|
exc = UnicodeDecodeError('utf-8', encoded, start, end, '')
|
|
self.assertIsInstance(str(exc), str)
|
|
|
|
@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 as e:
|
|
return e
|
|
exc = g()
|
|
self.assertIsInstance(exc, RecursionError, type(exc))
|
|
self.assertIn("maximum recursion depth exceeded", str(exc))
|
|
|
|
|
|
@cpython_only
|
|
@support.requires_resource('cpu')
|
|
def test_trashcan_recursion(self):
|
|
# See bpo-33930
|
|
|
|
def foo():
|
|
o = object()
|
|
for x in range(1_000_000):
|
|
# Create a big chain of method objects that will trigger
|
|
# a deep chain of calls when they need to be destructed.
|
|
o = o.__dir__
|
|
|
|
foo()
|
|
support.gc_collect()
|
|
|
|
@cpython_only
|
|
def test_recursion_normalizing_exception(self):
|
|
import_module("_testinternalcapi")
|
|
# 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
|
|
from test import support
|
|
|
|
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()
|
|
try:
|
|
recurse(support.exceeds_recursion_limit())
|
|
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
|
|
@unittest.skipIf(_testcapi is None, "requires _testcapi")
|
|
def test_recursion_normalizing_infinite_exception(self):
|
|
# Issue #30697. Test that a RecursionError is raised when
|
|
# maximum recursion depth has been exceeded when creating
|
|
# an exception
|
|
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)
|
|
expected = b'RecursionError: maximum recursion depth exceeded'
|
|
self.assertTrue(expected in err, msg=f"{expected!r} not found in {err[:3_000]!r}... (truncated)")
|
|
self.assertIn(b'Done.', out)
|
|
|
|
|
|
def test_recursion_in_except_handler(self):
|
|
|
|
def set_relative_recursion_limit(n):
|
|
depth = 1
|
|
while True:
|
|
try:
|
|
sys.setrecursionlimit(depth)
|
|
except RecursionError:
|
|
depth += 1
|
|
else:
|
|
break
|
|
sys.setrecursionlimit(depth+n)
|
|
|
|
def recurse_in_except():
|
|
try:
|
|
1/0
|
|
except:
|
|
recurse_in_except()
|
|
|
|
def recurse_after_except():
|
|
try:
|
|
1/0
|
|
except:
|
|
pass
|
|
recurse_after_except()
|
|
|
|
def recurse_in_body_and_except():
|
|
try:
|
|
recurse_in_body_and_except()
|
|
except:
|
|
recurse_in_body_and_except()
|
|
|
|
recursionlimit = sys.getrecursionlimit()
|
|
try:
|
|
set_relative_recursion_limit(10)
|
|
for func in (recurse_in_except, recurse_after_except, recurse_in_body_and_except):
|
|
with self.subTest(func=func):
|
|
try:
|
|
func()
|
|
except RecursionError:
|
|
pass
|
|
else:
|
|
self.fail("Should have raised a RecursionError")
|
|
finally:
|
|
sys.setrecursionlimit(recursionlimit)
|
|
|
|
|
|
@cpython_only
|
|
# Python built with Py_TRACE_REFS fail with a fatal error in
|
|
# _PyRefchain_Trace() on memory allocation error.
|
|
@unittest.skipIf(support.Py_TRACE_REFS, 'cannot test Py_TRACE_REFS build')
|
|
@unittest.skipIf(_testcapi is None, "requires _testcapi")
|
|
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'MemoryError', err)
|
|
|
|
@cpython_only
|
|
@unittest.skipIf(_testcapi is None, "requires _testcapi")
|
|
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 raised a MemoryError")
|
|
return traceback.format_tb(tb)
|
|
|
|
tb1 = raiseMemError()
|
|
tb2 = raiseMemError()
|
|
self.assertEqual(tb1, tb2)
|
|
|
|
@cpython_only
|
|
@unittest.skipIf(_testcapi is None, "requires _testcapi")
|
|
def test_exception_with_doc(self):
|
|
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
|
|
@unittest.skipIf(_testcapi is None, "requires _testcapi")
|
|
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")
|
|
gc_collect() # For PyPy or other GCs.
|
|
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")
|
|
gc_collect() # For PyPy or other GCs.
|
|
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
|
|
|
|
gc_collect() # For PyPy or other GCs.
|
|
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
|
|
# Python built with Py_TRACE_REFS fail with a fatal error in
|
|
# _PyRefchain_Trace() on memory allocation error.
|
|
@unittest.skipIf(support.Py_TRACE_REFS, 'cannot test Py_TRACE_REFS build')
|
|
@unittest.skipIf(_testcapi is None, "requires _testcapi")
|
|
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.assertIsNone(sys.exception())
|
|
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()
|
|
|
|
@unittest.skipIf(_testcapi is None, "requires _testcapi")
|
|
def test_memory_error_in_subinterp(self):
|
|
# gh-109894: subinterpreters shouldn't count on last resort memory error
|
|
# when MemoryError is raised through PyErr_NoMemory() call,
|
|
# and should preallocate memory errors as does the main interpreter.
|
|
# interp.static_objects.last_resort_memory_error.args
|
|
# should be initialized to empty tuple to avoid crash on attempt to print it.
|
|
code = f"""if 1:
|
|
import _testcapi
|
|
_testcapi.run_in_subinterp(\"[0]*{sys.maxsize}\")
|
|
exit(0)
|
|
"""
|
|
rc, _, err = script_helper.assert_python_ok("-c", code)
|
|
self.assertIn(b'MemoryError', err)
|
|
|
|
def test_keyerror_context(self):
|
|
# Make sure that _PyErr_SetKeyError() chains exceptions
|
|
try:
|
|
err1 = None
|
|
err2 = None
|
|
try:
|
|
d = {}
|
|
try:
|
|
raise ValueError("bug")
|
|
except Exception as exc:
|
|
err1 = exc
|
|
d[1]
|
|
except Exception as exc:
|
|
err2 = exc
|
|
|
|
self.assertIsInstance(err1, ValueError)
|
|
self.assertIsInstance(err2, KeyError)
|
|
self.assertEqual(err2.__context__, err1)
|
|
finally:
|
|
# Break any potential reference cycle
|
|
exc1 = None
|
|
exc2 = None
|
|
|
|
|
|
class NameErrorTests(unittest.TestCase):
|
|
def test_name_error_has_name(self):
|
|
try:
|
|
bluch
|
|
except NameError as exc:
|
|
self.assertEqual("bluch", exc.name)
|
|
|
|
def test_issue45826(self):
|
|
# regression test for bpo-45826
|
|
def f():
|
|
with self.assertRaisesRegex(NameError, 'aaa'):
|
|
aab
|
|
|
|
try:
|
|
f()
|
|
except self.failureException:
|
|
with support.captured_stderr() as err:
|
|
sys.__excepthook__(*sys.exc_info())
|
|
else:
|
|
self.fail("assertRaisesRegex should have failed.")
|
|
|
|
self.assertIn("aab", err.getvalue())
|
|
|
|
def test_issue45826_focused(self):
|
|
def f():
|
|
try:
|
|
nonsense
|
|
except BaseException as E:
|
|
E.with_traceback(None)
|
|
raise ZeroDivisionError()
|
|
|
|
try:
|
|
f()
|
|
except ZeroDivisionError:
|
|
with support.captured_stderr() as err:
|
|
sys.__excepthook__(*sys.exc_info())
|
|
|
|
self.assertIn("nonsense", err.getvalue())
|
|
self.assertIn("ZeroDivisionError", err.getvalue())
|
|
|
|
def test_gh_111654(self):
|
|
def f():
|
|
class TestClass:
|
|
TestClass
|
|
|
|
self.assertRaises(NameError, f)
|
|
|
|
# Note: name suggestion tests live in `test_traceback`.
|
|
|
|
|
|
class AttributeErrorTests(unittest.TestCase):
|
|
def test_attributes(self):
|
|
# Setting 'attr' should not be a problem.
|
|
exc = AttributeError('Ouch!')
|
|
self.assertIsNone(exc.name)
|
|
self.assertIsNone(exc.obj)
|
|
|
|
sentinel = object()
|
|
exc = AttributeError('Ouch', name='carry', obj=sentinel)
|
|
self.assertEqual(exc.name, 'carry')
|
|
self.assertIs(exc.obj, sentinel)
|
|
|
|
def test_getattr_has_name_and_obj(self):
|
|
class A:
|
|
blech = None
|
|
|
|
obj = A()
|
|
try:
|
|
obj.bluch
|
|
except AttributeError as exc:
|
|
self.assertEqual("bluch", exc.name)
|
|
self.assertEqual(obj, exc.obj)
|
|
try:
|
|
object.__getattribute__(obj, "bluch")
|
|
except AttributeError as exc:
|
|
self.assertEqual("bluch", exc.name)
|
|
self.assertEqual(obj, exc.obj)
|
|
|
|
def test_getattr_has_name_and_obj_for_method(self):
|
|
class A:
|
|
def blech(self):
|
|
return
|
|
|
|
obj = A()
|
|
try:
|
|
obj.bluch()
|
|
except AttributeError as exc:
|
|
self.assertEqual("bluch", exc.name)
|
|
self.assertEqual(obj, exc.obj)
|
|
|
|
# Note: name suggestion tests live in `test_traceback`.
|
|
|
|
|
|
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 = r"ImportError\(\) got an unexpected keyword argument 'invalid'"
|
|
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 run_script(source):
|
|
if isinstance(source, str):
|
|
with open(TESTFN, 'w', encoding='utf-8') as testfile:
|
|
testfile.write(dedent(source))
|
|
else:
|
|
with open(TESTFN, 'wb') as testfile:
|
|
testfile.write(source)
|
|
_rc, _out, err = script_helper.assert_python_failure('-Wd', '-X', 'utf8', TESTFN)
|
|
return err.decode('utf-8').splitlines()
|
|
|
|
class AssertionErrorTests(unittest.TestCase):
|
|
def tearDown(self):
|
|
unlink(TESTFN)
|
|
|
|
@force_not_colorized
|
|
def test_assertion_error_location(self):
|
|
cases = [
|
|
('assert None',
|
|
[
|
|
' assert None',
|
|
' ^^^^',
|
|
'AssertionError',
|
|
],
|
|
),
|
|
('assert 0',
|
|
[
|
|
' assert 0',
|
|
' ^',
|
|
'AssertionError',
|
|
],
|
|
),
|
|
('assert 1 > 2',
|
|
[
|
|
' assert 1 > 2',
|
|
' ^^^^^',
|
|
'AssertionError',
|
|
],
|
|
),
|
|
('assert 1 > 2 and 3 > 2',
|
|
[
|
|
' assert 1 > 2 and 3 > 2',
|
|
' ^^^^^^^^^^^^^^^',
|
|
'AssertionError',
|
|
],
|
|
),
|
|
('assert 1 > 2, "messäge"',
|
|
[
|
|
' assert 1 > 2, "messäge"',
|
|
' ^^^^^',
|
|
'AssertionError: messäge',
|
|
],
|
|
),
|
|
('assert 1 > 2, "messäge"'.encode(),
|
|
[
|
|
' assert 1 > 2, "messäge"',
|
|
' ^^^^^',
|
|
'AssertionError: messäge',
|
|
],
|
|
),
|
|
('# coding: latin1\nassert 1 > 2, "messäge"'.encode('latin1'),
|
|
[
|
|
' assert 1 > 2, "messäge"',
|
|
' ^^^^^',
|
|
'AssertionError: messäge',
|
|
],
|
|
),
|
|
(BOM_UTF8 + 'assert 1 > 2, "messäge"'.encode(),
|
|
[
|
|
' assert 1 > 2, "messäge"',
|
|
' ^^^^^',
|
|
'AssertionError: messäge',
|
|
],
|
|
),
|
|
|
|
# Multiline:
|
|
("""
|
|
assert (
|
|
1 > 2)
|
|
""",
|
|
[
|
|
' 1 > 2)',
|
|
' ^^^^^',
|
|
'AssertionError',
|
|
],
|
|
),
|
|
("""
|
|
assert (
|
|
1 > 2), "Message"
|
|
""",
|
|
[
|
|
' 1 > 2), "Message"',
|
|
' ^^^^^',
|
|
'AssertionError: Message',
|
|
],
|
|
),
|
|
("""
|
|
assert (
|
|
1 > 2), \\
|
|
"Message"
|
|
""",
|
|
[
|
|
' 1 > 2), \\',
|
|
' ^^^^^',
|
|
'AssertionError: Message',
|
|
],
|
|
),
|
|
]
|
|
for source, expected in cases:
|
|
with self.subTest(source=source):
|
|
result = run_script(source)
|
|
self.assertEqual(result[-3:], expected)
|
|
|
|
@force_not_colorized
|
|
def test_multiline_not_highlighted(self):
|
|
cases = [
|
|
("""
|
|
assert (
|
|
1 > 2
|
|
)
|
|
""",
|
|
[
|
|
' 1 > 2',
|
|
'AssertionError',
|
|
],
|
|
),
|
|
("""
|
|
assert (
|
|
1 < 2 and
|
|
3 > 4
|
|
)
|
|
""",
|
|
[
|
|
' 1 < 2 and',
|
|
' 3 > 4',
|
|
'AssertionError',
|
|
],
|
|
),
|
|
]
|
|
for source, expected in cases:
|
|
with self.subTest(source=source):
|
|
result = run_script(source)
|
|
self.assertEqual(result[-len(expected):], expected)
|
|
|
|
|
|
class SyntaxErrorTests(unittest.TestCase):
|
|
maxDiff = None
|
|
|
|
@force_not_colorized
|
|
def test_range_of_offsets(self):
|
|
cases = [
|
|
# Basic range from 2->7
|
|
(("bad.py", 1, 2, "abcdefg", 1, 7),
|
|
dedent(
|
|
"""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
^^^^^
|
|
SyntaxError: bad bad
|
|
""")),
|
|
# end_offset = start_offset + 1
|
|
(("bad.py", 1, 2, "abcdefg", 1, 3),
|
|
dedent(
|
|
"""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
^
|
|
SyntaxError: bad bad
|
|
""")),
|
|
# Negative end offset
|
|
(("bad.py", 1, 2, "abcdefg", 1, -2),
|
|
dedent(
|
|
"""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
^
|
|
SyntaxError: bad bad
|
|
""")),
|
|
# end offset before starting offset
|
|
(("bad.py", 1, 4, "abcdefg", 1, 2),
|
|
dedent(
|
|
"""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
^
|
|
SyntaxError: bad bad
|
|
""")),
|
|
# Both offsets negative
|
|
(("bad.py", 1, -4, "abcdefg", 1, -2),
|
|
dedent(
|
|
"""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
SyntaxError: bad bad
|
|
""")),
|
|
# Both offsets negative and the end more negative
|
|
(("bad.py", 1, -4, "abcdefg", 1, -5),
|
|
dedent(
|
|
"""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
SyntaxError: bad bad
|
|
""")),
|
|
# Both offsets 0
|
|
(("bad.py", 1, 0, "abcdefg", 1, 0),
|
|
dedent(
|
|
"""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
SyntaxError: bad bad
|
|
""")),
|
|
# Start offset 0 and end offset not 0
|
|
(("bad.py", 1, 0, "abcdefg", 1, 5),
|
|
dedent(
|
|
"""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
SyntaxError: bad bad
|
|
""")),
|
|
# End offset pass the source length
|
|
(("bad.py", 1, 2, "abcdefg", 1, 100),
|
|
dedent(
|
|
"""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
^^^^^^
|
|
SyntaxError: bad bad
|
|
""")),
|
|
]
|
|
for args, expected in cases:
|
|
with self.subTest(args=args):
|
|
try:
|
|
raise SyntaxError("bad bad", args)
|
|
except SyntaxError as exc:
|
|
with support.captured_stderr() as err:
|
|
sys.__excepthook__(*sys.exc_info())
|
|
self.assertIn(expected, err.getvalue())
|
|
the_exception = exc
|
|
|
|
def test_subclass(self):
|
|
class MySyntaxError(SyntaxError):
|
|
pass
|
|
|
|
try:
|
|
raise MySyntaxError("bad bad", ("bad.py", 1, 2, "abcdefg", 1, 7))
|
|
except SyntaxError as exc:
|
|
with support.captured_stderr() as err:
|
|
sys.__excepthook__(*sys.exc_info())
|
|
self.assertIn("""
|
|
File "bad.py", line 1
|
|
abcdefg
|
|
^^^^^
|
|
""", err.getvalue())
|
|
|
|
def test_encodings(self):
|
|
self.addCleanup(unlink, TESTFN)
|
|
source = (
|
|
'# -*- coding: cp437 -*-\n'
|
|
'"¢¢¢¢¢¢" + f(4, x for x in range(1))\n'
|
|
)
|
|
err = run_script(source.encode('cp437'))
|
|
self.assertEqual(err[-3], ' "¢¢¢¢¢¢" + f(4, x for x in range(1))')
|
|
self.assertEqual(err[-2], ' ^^^^^^^^^^^^^^^^^^^')
|
|
|
|
# Check backwards tokenizer errors
|
|
source = '# -*- coding: ascii -*-\n\n(\n'
|
|
err = run_script(source)
|
|
self.assertEqual(err[-3], ' (')
|
|
self.assertEqual(err[-2], ' ^')
|
|
|
|
def test_non_utf8(self):
|
|
# Check non utf-8 characters
|
|
self.addCleanup(unlink, TESTFN)
|
|
err = run_script(b"\x89")
|
|
self.assertIn("SyntaxError: Non-UTF-8 code starting with '\\x89' in file", err[-1])
|
|
|
|
def test_string_source(self):
|
|
def try_compile(source):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
compile(source, '<string>', 'exec')
|
|
return cm.exception
|
|
|
|
exc = try_compile('return "ä"')
|
|
self.assertEqual(str(exc), "'return' outside function (<string>, line 1)")
|
|
self.assertIsNone(exc.text)
|
|
self.assertEqual(exc.offset, 1)
|
|
self.assertEqual(exc.end_offset, 12)
|
|
|
|
exc = try_compile('return "ä"'.encode())
|
|
self.assertEqual(str(exc), "'return' outside function (<string>, line 1)")
|
|
self.assertIsNone(exc.text)
|
|
self.assertEqual(exc.offset, 1)
|
|
self.assertEqual(exc.end_offset, 12)
|
|
|
|
exc = try_compile(BOM_UTF8 + 'return "ä"'.encode())
|
|
self.assertEqual(str(exc), "'return' outside function (<string>, line 1)")
|
|
self.assertIsNone(exc.text)
|
|
self.assertEqual(exc.offset, 1)
|
|
self.assertEqual(exc.end_offset, 12)
|
|
|
|
exc = try_compile('# coding: latin1\nreturn "ä"'.encode('latin1'))
|
|
self.assertEqual(str(exc), "'return' outside function (<string>, line 2)")
|
|
self.assertIsNone(exc.text)
|
|
self.assertEqual(exc.offset, 1)
|
|
self.assertEqual(exc.end_offset, 12)
|
|
|
|
exc = try_compile('return "ä" #' + 'ä'*1000)
|
|
self.assertEqual(str(exc), "'return' outside function (<string>, line 1)")
|
|
self.assertIsNone(exc.text)
|
|
self.assertEqual(exc.offset, 1)
|
|
self.assertEqual(exc.end_offset, 12)
|
|
|
|
exc = try_compile('return "ä" # ' + 'ä'*1000)
|
|
self.assertEqual(str(exc), "'return' outside function (<string>, line 1)")
|
|
self.assertIsNone(exc.text)
|
|
self.assertEqual(exc.offset, 1)
|
|
self.assertEqual(exc.end_offset, 12)
|
|
|
|
def test_file_source(self):
|
|
self.addCleanup(unlink, TESTFN)
|
|
err = run_script('return "ä"')
|
|
self.assertEqual(err[-3:], [
|
|
' return "ä"',
|
|
' ^^^^^^^^^^',
|
|
"SyntaxError: 'return' outside function"])
|
|
|
|
err = run_script('return "ä"'.encode())
|
|
self.assertEqual(err[-3:], [
|
|
' return "ä"',
|
|
' ^^^^^^^^^^',
|
|
"SyntaxError: 'return' outside function"])
|
|
|
|
err = run_script(BOM_UTF8 + 'return "ä"'.encode())
|
|
self.assertEqual(err[-3:], [
|
|
' return "ä"',
|
|
' ^^^^^^^^^^',
|
|
"SyntaxError: 'return' outside function"])
|
|
|
|
err = run_script('# coding: latin1\nreturn "ä"'.encode('latin1'))
|
|
self.assertEqual(err[-3:], [
|
|
' return "ä"',
|
|
' ^^^^^^^^^^',
|
|
"SyntaxError: 'return' outside function"])
|
|
|
|
err = run_script('return "ä" #' + 'ä'*1000)
|
|
self.assertEqual(err[-2:], [
|
|
' ^^^^^^^^^^^',
|
|
"SyntaxError: 'return' outside function"])
|
|
self.assertEqual(err[-3][:100], ' return "ä" #' + 'ä'*84)
|
|
|
|
err = run_script('return "ä" # ' + 'ä'*1000)
|
|
self.assertEqual(err[-2:], [
|
|
' ^^^^^^^^^^^',
|
|
"SyntaxError: 'return' outside function"])
|
|
self.assertEqual(err[-3][:100], ' return "ä" # ' + 'ä'*83)
|
|
|
|
def test_attributes_new_constructor(self):
|
|
args = ("bad.py", 1, 2, "abcdefg", 1, 100)
|
|
the_exception = SyntaxError("bad bad", args)
|
|
filename, lineno, offset, error, end_lineno, end_offset = args
|
|
self.assertEqual(filename, the_exception.filename)
|
|
self.assertEqual(lineno, the_exception.lineno)
|
|
self.assertEqual(end_lineno, the_exception.end_lineno)
|
|
self.assertEqual(offset, the_exception.offset)
|
|
self.assertEqual(end_offset, the_exception.end_offset)
|
|
self.assertEqual(error, the_exception.text)
|
|
self.assertEqual("bad bad", the_exception.msg)
|
|
|
|
def test_attributes_old_constructor(self):
|
|
args = ("bad.py", 1, 2, "abcdefg")
|
|
the_exception = SyntaxError("bad bad", args)
|
|
filename, lineno, offset, error = args
|
|
self.assertEqual(filename, the_exception.filename)
|
|
self.assertEqual(lineno, the_exception.lineno)
|
|
self.assertEqual(None, the_exception.end_lineno)
|
|
self.assertEqual(offset, the_exception.offset)
|
|
self.assertEqual(None, the_exception.end_offset)
|
|
self.assertEqual(error, the_exception.text)
|
|
self.assertEqual("bad bad", the_exception.msg)
|
|
|
|
def test_incorrect_constructor(self):
|
|
args = ("bad.py", 1, 2)
|
|
self.assertRaises(TypeError, SyntaxError, "bad bad", args)
|
|
|
|
args = ("bad.py", 1, 2, 4, 5, 6, 7)
|
|
self.assertRaises(TypeError, SyntaxError, "bad bad", args)
|
|
|
|
args = ("bad.py", 1, 2, "abcdefg", 1)
|
|
self.assertRaises(TypeError, SyntaxError, "bad bad", args)
|
|
|
|
|
|
class TestInvalidExceptionMatcher(unittest.TestCase):
|
|
def test_except_star_invalid_exception_type(self):
|
|
with self.assertRaises(TypeError):
|
|
try:
|
|
raise ValueError
|
|
except 42:
|
|
pass
|
|
|
|
with self.assertRaises(TypeError):
|
|
try:
|
|
raise ValueError
|
|
except (ValueError, 42):
|
|
pass
|
|
|
|
|
|
class PEP626Tests(unittest.TestCase):
|
|
|
|
def lineno_after_raise(self, f, *expected):
|
|
try:
|
|
f()
|
|
except Exception as ex:
|
|
t = ex.__traceback__
|
|
else:
|
|
self.fail("No exception raised")
|
|
lines = []
|
|
t = t.tb_next # Skip this function
|
|
while t:
|
|
frame = t.tb_frame
|
|
lines.append(
|
|
None if frame.f_lineno is None else
|
|
frame.f_lineno-frame.f_code.co_firstlineno
|
|
)
|
|
t = t.tb_next
|
|
self.assertEqual(tuple(lines), expected)
|
|
|
|
def test_lineno_after_raise_simple(self):
|
|
def simple():
|
|
1/0
|
|
pass
|
|
self.lineno_after_raise(simple, 1)
|
|
|
|
def test_lineno_after_raise_in_except(self):
|
|
def in_except():
|
|
try:
|
|
1/0
|
|
except:
|
|
1/0
|
|
pass
|
|
self.lineno_after_raise(in_except, 4)
|
|
|
|
def test_lineno_after_other_except(self):
|
|
def other_except():
|
|
try:
|
|
1/0
|
|
except TypeError as ex:
|
|
pass
|
|
self.lineno_after_raise(other_except, 3)
|
|
|
|
def test_lineno_in_named_except(self):
|
|
def in_named_except():
|
|
try:
|
|
1/0
|
|
except Exception as ex:
|
|
1/0
|
|
pass
|
|
self.lineno_after_raise(in_named_except, 4)
|
|
|
|
def test_lineno_in_try(self):
|
|
def in_try():
|
|
try:
|
|
1/0
|
|
finally:
|
|
pass
|
|
self.lineno_after_raise(in_try, 4)
|
|
|
|
def test_lineno_in_finally_normal(self):
|
|
def in_finally_normal():
|
|
try:
|
|
pass
|
|
finally:
|
|
1/0
|
|
pass
|
|
self.lineno_after_raise(in_finally_normal, 4)
|
|
|
|
def test_lineno_in_finally_except(self):
|
|
def in_finally_except():
|
|
try:
|
|
1/0
|
|
finally:
|
|
1/0
|
|
pass
|
|
self.lineno_after_raise(in_finally_except, 4)
|
|
|
|
def test_lineno_after_with(self):
|
|
class Noop:
|
|
def __enter__(self):
|
|
return self
|
|
def __exit__(self, *args):
|
|
pass
|
|
def after_with():
|
|
with Noop():
|
|
1/0
|
|
pass
|
|
self.lineno_after_raise(after_with, 2)
|
|
|
|
def test_missing_lineno_shows_as_none(self):
|
|
def f():
|
|
1/0
|
|
self.lineno_after_raise(f, 1)
|
|
f.__code__ = f.__code__.replace(co_linetable=b'\xf8\xf8\xf8\xf9\xf8\xf8\xf8')
|
|
self.lineno_after_raise(f, None)
|
|
|
|
def test_lineno_after_raise_in_with_exit(self):
|
|
class ExitFails:
|
|
def __enter__(self):
|
|
return self
|
|
def __exit__(self, *args):
|
|
raise ValueError
|
|
|
|
def after_with():
|
|
with ExitFails():
|
|
1/0
|
|
self.lineno_after_raise(after_with, 1, 1)
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|