diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/python-2.6.1/Lib/test/test_pep352.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/test/test_pep352.py Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,256 @@ +import unittest +import __builtin__ +import exceptions +import warnings +from test.test_support import run_unittest +import os +from platform import system as platform_system + +def ignore_message_warning(): + """Ignore the DeprecationWarning for BaseException.message.""" + warnings.resetwarnings() + warnings.filterwarnings("ignore", "BaseException.message", + DeprecationWarning) + + +class ExceptionClassTests(unittest.TestCase): + + """Tests for anything relating to exception objects themselves (e.g., + inheritance hierarchy)""" + + def test_builtins_new_style(self): + self.failUnless(issubclass(Exception, object)) + + def verify_instance_interface(self, ins): + with warnings.catch_warnings(): + ignore_message_warning() + for attr in ("args", "message", "__str__", "__repr__", + "__getitem__"): + self.failUnless(hasattr(ins, attr), + "%s missing %s attribute" % + (ins.__class__.__name__, attr)) + + def test_inheritance(self): + # Make sure the inheritance hierarchy matches the documentation + exc_set = set(x for x in dir(exceptions) if not x.startswith('_')) + inheritance_tree = open(os.path.join(os.path.split(__file__)[0], + 'exception_hierarchy.txt')) + try: + superclass_name = inheritance_tree.readline().rstrip() + try: + last_exc = getattr(__builtin__, superclass_name) + except AttributeError: + self.fail("base class %s not a built-in" % superclass_name) + self.failUnless(superclass_name in exc_set) + exc_set.discard(superclass_name) + superclasses = [] # Loop will insert base exception + last_depth = 0 + for exc_line in inheritance_tree: + exc_line = exc_line.rstrip() + depth = exc_line.rindex('-') + exc_name = exc_line[depth+2:] # Slice past space + if '(' in exc_name: + paren_index = exc_name.index('(') + platform_name = exc_name[paren_index+1:-1] + exc_name = exc_name[:paren_index-1] # Slice off space + if platform_system() != platform_name: + exc_set.discard(exc_name) + continue + if '[' in exc_name: + left_bracket = exc_name.index('[') + exc_name = exc_name[:left_bracket-1] # cover space + try: + exc = getattr(__builtin__, exc_name) + except AttributeError: + self.fail("%s not a built-in exception" % exc_name) + if last_depth < depth: + superclasses.append((last_depth, last_exc)) + elif last_depth > depth: + while superclasses[-1][0] >= depth: + superclasses.pop() + self.failUnless(issubclass(exc, superclasses[-1][1]), + "%s is not a subclass of %s" % (exc.__name__, + superclasses[-1][1].__name__)) + try: # Some exceptions require arguments; just skip them + self.verify_instance_interface(exc()) + except TypeError: + pass + self.failUnless(exc_name in exc_set) + exc_set.discard(exc_name) + last_exc = exc + last_depth = depth + finally: + inheritance_tree.close() + self.failUnlessEqual(len(exc_set), 0, "%s not accounted for" % exc_set) + + interface_tests = ("length", "args", "message", "str", "unicode", "repr", + "indexing") + + def interface_test_driver(self, results): + for test_name, (given, expected) in zip(self.interface_tests, results): + self.failUnlessEqual(given, expected, "%s: %s != %s" % (test_name, + given, expected)) + + def test_interface_single_arg(self): + # Make sure interface works properly when given a single argument + arg = "spam" + exc = Exception(arg) + with warnings.catch_warnings(): + ignore_message_warning() + results = ([len(exc.args), 1], [exc.args[0], arg], + [exc.message, arg], + [str(exc), str(arg)], [unicode(exc), unicode(arg)], + [repr(exc), exc.__class__.__name__ + repr(exc.args)], [exc[0], + arg]) + self.interface_test_driver(results) + + def test_interface_multi_arg(self): + # Make sure interface correct when multiple arguments given + arg_count = 3 + args = tuple(range(arg_count)) + exc = Exception(*args) + with warnings.catch_warnings(): + ignore_message_warning() + results = ([len(exc.args), arg_count], [exc.args, args], + [exc.message, ''], [str(exc), str(args)], + [unicode(exc), unicode(args)], + [repr(exc), exc.__class__.__name__ + repr(exc.args)], + [exc[-1], args[-1]]) + self.interface_test_driver(results) + + def test_interface_no_arg(self): + # Make sure that with no args that interface is correct + exc = Exception() + with warnings.catch_warnings(): + ignore_message_warning() + results = ([len(exc.args), 0], [exc.args, tuple()], + [exc.message, ''], + [str(exc), ''], [unicode(exc), u''], + [repr(exc), exc.__class__.__name__ + '()'], [True, True]) + self.interface_test_driver(results) + + + def test_message_deprecation(self): + # As of Python 2.6, BaseException.message is deprecated. + with warnings.catch_warnings(): + warnings.resetwarnings() + warnings.filterwarnings('error') + + try: + BaseException().message + except DeprecationWarning: + pass + else: + self.fail("BaseException.message not deprecated") + + exc = BaseException() + try: + exc.message = '' + except DeprecationWarning: + pass + else: + self.fail("BaseException.message assignment not deprecated") + +class UsageTests(unittest.TestCase): + + """Test usage of exceptions""" + + def raise_fails(self, object_): + """Make sure that raising 'object_' triggers a TypeError.""" + try: + raise object_ + except TypeError: + return # What is expected. + self.fail("TypeError expected for raising %s" % type(object_)) + + def catch_fails(self, object_): + """Catching 'object_' should raise a TypeError.""" + try: + try: + raise StandardError + except object_: + pass + except TypeError: + pass + except StandardError: + self.fail("TypeError expected when catching %s" % type(object_)) + + try: + try: + raise StandardError + except (object_,): + pass + except TypeError: + return + except StandardError: + self.fail("TypeError expected when catching %s as specified in a " + "tuple" % type(object_)) + + def test_raise_classic(self): + # Raising a classic class is okay (for now). + class ClassicClass: + pass + try: + raise ClassicClass + except ClassicClass: + pass + except: + self.fail("unable to raise classic class") + try: + raise ClassicClass() + except ClassicClass: + pass + except: + self.fail("unable to raise class class instance") + + def test_raise_new_style_non_exception(self): + # You cannot raise a new-style class that does not inherit from + # BaseException; the ability was not possible until BaseException's + # introduction so no need to support new-style objects that do not + # inherit from it. + class NewStyleClass(object): + pass + self.raise_fails(NewStyleClass) + self.raise_fails(NewStyleClass()) + + def test_raise_string(self): + # Raising a string raises TypeError. + self.raise_fails("spam") + + def test_catch_string(self): + # Catching a string should trigger a DeprecationWarning. + with warnings.catch_warnings(): + warnings.resetwarnings() + warnings.filterwarnings("error") + str_exc = "spam" + try: + try: + raise StandardError + except str_exc: + pass + except DeprecationWarning: + pass + except StandardError: + self.fail("catching a string exception did not raise " + "DeprecationWarning") + # Make sure that even if the string exception is listed in a tuple + # that a warning is raised. + try: + try: + raise StandardError + except (AssertionError, str_exc): + pass + except DeprecationWarning: + pass + except StandardError: + self.fail("catching a string exception specified in a tuple did " + "not raise DeprecationWarning") + + +def test_main(): + run_unittest(ExceptionClassTests, UsageTests) + + + +if __name__ == '__main__': + test_main()