| # Python test set -- part 5, built-in exceptions |
| |
| import os |
| import sys |
| import unittest |
| import pickle |
| try: |
| import cPickle |
| except ImportError: |
| cPickle = None |
| |
| from test.test_support import TESTFN, unlink, run_unittest |
| |
| # 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: |
| import exceptions |
| reload(exceptions) |
| except ImportError as e: |
| self.fail("reloading exceptions: %s" % e) |
| |
| def raise_catch(self, exc, excname): |
| try: |
| raise exc, "spam" |
| except exc as err: |
| buf1 = str(err) |
| try: |
| raise exc("spam") |
| except exc as err: |
| buf2 = str(err) |
| self.assertEquals(buf1, buf2) |
| self.assertEquals(exc.__name__, excname) |
| |
| def testRaising(self): |
| self.raise_catch(AttributeError, "AttributeError") |
| self.assertRaises(AttributeError, getattr, sys, "undefined_attribute") |
| |
| self.raise_catch(EOFError, "EOFError") |
| fp = open(TESTFN, 'w') |
| fp.close() |
| fp = open(TESTFN, 'r') |
| savestdin = sys.stdin |
| try: |
| try: |
| import marshal |
| marshal.loads('') |
| except EOFError: |
| pass |
| finally: |
| sys.stdin = savestdin |
| fp.close() |
| unlink(TESTFN) |
| |
| self.raise_catch(IOError, "IOError") |
| self.assertRaises(IOError, open, 'this file does not exist', 'r') |
| |
| self.raise_catch(ImportError, "ImportError") |
| self.assertRaises(ImportError, __import__, "undefined_module") |
| |
| self.raise_catch(IndexError, "IndexError") |
| x = [] |
| self.assertRaises(IndexError, x.__getitem__, 10) |
| |
| self.raise_catch(KeyError, "KeyError") |
| x = {} |
| self.assertRaises(KeyError, x.__getitem__, 'key') |
| |
| self.raise_catch(KeyboardInterrupt, "KeyboardInterrupt") |
| |
| self.raise_catch(MemoryError, "MemoryError") |
| |
| self.raise_catch(NameError, "NameError") |
| try: x = undefined_variable |
| except NameError: pass |
| |
| self.raise_catch(OverflowError, "OverflowError") |
| x = 1 |
| for dummy in range(128): |
| x += x # this simply shouldn't blow up |
| |
| self.raise_catch(RuntimeError, "RuntimeError") |
| |
| self.raise_catch(SyntaxError, "SyntaxError") |
| try: exec('/\n') |
| except SyntaxError: pass |
| |
| self.raise_catch(IndentationError, "IndentationError") |
| |
| self.raise_catch(TabError, "TabError") |
| # can only be tested under -tt, and is the only test for -tt |
| #try: compile("try:\n\t1/0\n \t1/0\nfinally:\n pass\n", '<string>', 'exec') |
| #except TabError: pass |
| #else: self.fail("TabError not raised") |
| |
| self.raise_catch(SystemError, "SystemError") |
| |
| self.raise_catch(SystemExit, "SystemExit") |
| self.assertRaises(SystemExit, sys.exit, 0) |
| |
| self.raise_catch(TypeError, "TypeError") |
| try: [] + () |
| except TypeError: pass |
| |
| self.raise_catch(ValueError, "ValueError") |
| self.assertRaises(ValueError, chr, 10000) |
| |
| self.raise_catch(ZeroDivisionError, "ZeroDivisionError") |
| try: x = 1/0 |
| except ZeroDivisionError: pass |
| |
| self.raise_catch(Exception, "Exception") |
| try: x = 1/0 |
| except Exception as e: pass |
| |
| def testSyntaxErrorMessage(self): |
| # make sure the right exception message is raised for each of |
| # these code fragments |
| |
| def ckmsg(src, msg): |
| try: |
| compile(src, '<fragment>', 'exec') |
| except SyntaxError as e: |
| if e.msg != msg: |
| self.fail("expected %s, got %s" % (msg, e.msg)) |
| else: |
| self.fail("failed to get expected SyntaxError") |
| |
| s = '''while 1: |
| try: |
| pass |
| finally: |
| continue''' |
| |
| if not sys.platform.startswith('java'): |
| ckmsg(s, "'continue' not supported inside 'finally' clause") |
| |
| s = '''if 1: |
| try: |
| continue |
| except: |
| pass''' |
| |
| ckmsg(s, "'continue' not properly in loop") |
| ckmsg("continue\n", "'continue' not properly in loop") |
| |
| def testSettingException(self): |
| # test that setting an exception at the C level works even if the |
| # exception object can't be constructed. |
| |
| class BadException(Exception): |
| def __init__(self_): |
| raise RuntimeError, "can't instantiate BadException" |
| |
| class InvalidException: |
| pass |
| |
| def test_capi1(): |
| import _testcapi |
| try: |
| _testcapi.raise_exception(BadException, 1) |
| except TypeError as err: |
| exc, err, tb = sys.exc_info() |
| co = tb.tb_frame.f_code |
| self.assertEquals(co.co_name, "test_capi1") |
| self.assert_(co.co_filename.endswith('test_exceptions'+os.extsep+'py')) |
| else: |
| self.fail("Expected exception") |
| |
| def test_capi2(): |
| import _testcapi |
| try: |
| _testcapi.raise_exception(BadException, 0) |
| except RuntimeError as err: |
| exc, err, tb = sys.exc_info() |
| co = tb.tb_frame.f_code |
| self.assertEquals(co.co_name, "__init__") |
| self.assert_(co.co_filename.endswith('test_exceptions'+os.extsep+'py')) |
| co2 = tb.tb_frame.f_back.f_code |
| self.assertEquals(co2.co_name, "test_capi2") |
| else: |
| self.fail("Expected exception") |
| |
| def test_capi3(): |
| import _testcapi |
| self.assertRaises(SystemError, _testcapi.raise_exception, |
| InvalidException, 1) |
| |
| if not sys.platform.startswith('java'): |
| test_capi1() |
| test_capi2() |
| test_capi3() |
| |
| def test_WindowsError(self): |
| try: |
| WindowsError |
| except NameError: |
| pass |
| else: |
| self.failUnlessEqual(str(WindowsError(1001)), |
| "1001") |
| self.failUnlessEqual(str(WindowsError(1001, "message")), |
| "[Error 1001] message") |
| self.failUnlessEqual(WindowsError(1001, "message").errno, 22) |
| self.failUnlessEqual(WindowsError(1001, "message").winerror, 1001) |
| |
| def testAttributes(self): |
| # test that exception attributes are happy |
| |
| exceptionList = [ |
| (BaseException, (), {'message' : '', 'args' : ()}), |
| (BaseException, (1, ), {'message' : 1, 'args' : (1,)}), |
| (BaseException, ('foo',), |
| {'message' : 'foo', 'args' : ('foo',)}), |
| (BaseException, ('foo', 1), |
| {'message' : '', 'args' : ('foo', 1)}), |
| (SystemExit, ('foo',), |
| {'message' : 'foo', 'args' : ('foo',), 'code' : 'foo'}), |
| (IOError, ('foo',), |
| {'message' : 'foo', 'args' : ('foo',), 'filename' : None, |
| 'errno' : None, 'strerror' : None}), |
| (IOError, ('foo', 'bar'), |
| {'message' : '', 'args' : ('foo', 'bar'), 'filename' : None, |
| 'errno' : 'foo', 'strerror' : 'bar'}), |
| (IOError, ('foo', 'bar', 'baz'), |
| {'message' : '', 'args' : ('foo', 'bar'), 'filename' : 'baz', |
| 'errno' : 'foo', 'strerror' : 'bar'}), |
| (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'}), |
| (EnvironmentError, (1, 'strErrorStr', 'filenameStr'), |
| {'message' : '', 'args' : (1, 'strErrorStr'), 'errno' : 1, |
| 'strerror' : 'strErrorStr', 'filename' : 'filenameStr'}), |
| (SyntaxError, ('msgStr',), |
| {'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')), |
| {'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'), |
| {'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, (), {'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' : u'a', |
| 'start' : 0, 'reason' : 'ordinal not in range'}), |
| (UnicodeDecodeError, ('ascii', '\xff', 0, 1, 'ordinal not in range'), |
| {'message' : '', 'args' : ('ascii', '\xff', 0, 1, |
| 'ordinal not in range'), |
| 'encoding' : 'ascii', 'object' : '\xff', |
| 'start' : 0, 'reason' : 'ordinal not in range'}), |
| (UnicodeTranslateError, (u"\u3042", 0, 1, "ouch"), |
| {'message' : '', 'args' : (u'\u3042', 0, 1, 'ouch'), |
| 'object' : u'\u3042', 'reason' : 'ouch', |
| 'start' : 0, 'end' : 1}), |
| ] |
| try: |
| exceptionList.append( |
| (WindowsError, (1, 'strErrorStr', 'filenameStr'), |
| {'message' : '', 'args' : (1, 'strErrorStr'), |
| 'strerror' : 'strErrorStr', 'winerror' : 1, |
| 'errno' : 22, 'filename' : 'filenameStr'}) |
| ) |
| except NameError: |
| pass |
| |
| for exc, args, expected in exceptionList: |
| try: |
| raise exc(*args) |
| except BaseException as e: |
| if type(e) is not exc: |
| raise |
| # Verify module name |
| self.assertEquals(type(e).__module__, 'exceptions') |
| # Verify no ref leaks in Exc_str() |
| s = str(e) |
| for checkArgName in expected: |
| self.assertEquals(repr(getattr(e, checkArgName)), |
| repr(expected[checkArgName]), |
| 'exception "%s", attribute "%s"' % |
| (repr(e), checkArgName)) |
| |
| # test for pickling support |
| for p in pickle, cPickle: |
| if p is None: |
| continue # cPickle not found -- skip it |
| for protocol in range(p.HIGHEST_PROTOCOL + 1): |
| new = p.loads(p.dumps(e, protocol)) |
| for checkArgName in expected: |
| got = repr(getattr(new, checkArgName)) |
| want = repr(expected[checkArgName]) |
| self.assertEquals(got, want, |
| 'pickled "%r", attribute "%s' % |
| (e, checkArgName)) |
| |
| 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.failUnlessEqual(exc[:], args) |
| |
| def testKeywordArgs(self): |
| # test that builtin exception don't take keyword args, |
| # but user-defined subclasses can if they want |
| self.assertRaises(TypeError, BaseException, a=1) |
| |
| class DerivedException(BaseException): |
| def __init__(self, fancy_arg): |
| BaseException.__init__(self) |
| self.fancy_arg = fancy_arg |
| |
| x = DerivedException(fancy_arg=42) |
| self.assertEquals(x.fancy_arg, 42) |
| |
| def testInfiniteRecursion(self): |
| def f(): |
| return f() |
| self.assertRaises(RuntimeError, f) |
| |
| def g(): |
| try: |
| return g() |
| except ValueError: |
| return -1 |
| self.assertRaises(RuntimeError, g) |
| |
| def testUnicodeStrUsage(self): |
| # Make sure both instances and classes have a str and unicode |
| # representation. |
| self.failUnless(str(Exception)) |
| self.failUnless(unicode(Exception)) |
| self.failUnless(str(Exception('a'))) |
| self.failUnless(unicode(Exception(u'a'))) |
| |
| def testExceptionCleanup(self): |
| # Make sure "except V as N" exceptions are cleaned up properly |
| |
| try: |
| raise Exception() |
| except Exception as e: |
| self.failUnless(e) |
| del e |
| self.failIf('e' in locals()) |
| |
| |
| def test_main(): |
| run_unittest(ExceptionTests) |
| |
| if __name__ == '__main__': |
| test_main() |