def test_onlyOldStyleMayBeDecorated(self):
"""
Using L{_oldstyle._oldStyle} on a new-style class on Python 2 will
raise an exception.
"""
with self.assertRaises(ValueError) as e:
_oldstyle._oldStyle(SomeNewStyleClass)
self.assertEqual(
e.exception.args[0],
("twisted.python._oldstyle._oldStyle is being used to decorate a "
"new-style class (twisted.test.test_nooldstyle.SomeNewStyleClass)"
". This should only be used to decorate old-style classes."))
def test_onlyOldStyleMayBeDecorated(self):
"""
Using L{_oldstyle._oldStyle} on a new-style class on Python 2 will
raise an exception.
"""
with self.assertRaises(ValueError) as e:
_oldstyle._oldStyle(SomeNewStyleClass)
self.assertEqual(
e.exception.args[0],
("twisted.python._oldstyle._oldStyle is being used to decorate a "
"new-style class (twisted.test.test_nooldstyle.SomeNewStyleClass)"
". This should only be used to decorate old-style classes."))
def test_noOpByDefault(self):
"""
On Python 3 or on Py2 when C{TWISTED_NEWSTYLE} is not set,
L{_oldStyle._oldStyle} is a no-op.
"""
updatedClass = _oldstyle._oldStyle(SomeOldStyleClass)
self.assertEqual(type(updatedClass), type(SomeOldStyleClass))
self.assertIs(updatedClass, SomeOldStyleClass)
def test_noOpByDefault(self):
"""
On Python 3 or on Py2 when C{TWISTED_NEWSTYLE} is not set,
L{_oldStyle._oldStyle} is a no-op.
"""
updatedClass = _oldstyle._oldStyle(SomeOldStyleClass)
self.assertEqual(type(updatedClass), type(SomeOldStyleClass))
self.assertIs(updatedClass, SomeOldStyleClass)
def test_carriesAttributes(self):
"""
The class returned by L{_oldstyle._oldStyle} has the same C{__name__},
C{__module__}, and docstring (C{__doc__}) attributes as the original.
"""
updatedClass = _oldstyle._oldStyle(SomeOldStyleClass)
self.assertEqual(updatedClass.__name__, SomeOldStyleClass.__name__)
self.assertEqual(updatedClass.__doc__, SomeOldStyleClass.__doc__)
self.assertEqual(updatedClass.__module__, SomeOldStyleClass.__module__)
def test_carriesAttributes(self):
"""
The class returned by L{_oldstyle._oldStyle} has the same C{__name__},
C{__module__}, and docstring (C{__doc__}) attributes as the original.
"""
updatedClass = _oldstyle._oldStyle(SomeOldStyleClass)
self.assertEqual(updatedClass.__name__, SomeOldStyleClass.__name__)
self.assertEqual(updatedClass.__doc__, SomeOldStyleClass.__doc__)
self.assertEqual(updatedClass.__module__, SomeOldStyleClass.__module__)
def test_makesNewStyle(self):
"""
L{_oldstyle._oldStyle} wraps an old-style class and returns a new-style
class that has the same functions, attributes, etc.
"""
self.assertEqual(type(SomeOldStyleClass), types.ClassType)
updatedClass = _oldstyle._oldStyle(SomeOldStyleClass)
self.assertEqual(type(updatedClass), type)
self.assertEqual(updatedClass().func(), "hi")
self.assertEqual(updatedClass().bar, "baz")
def test_makesNewStyle(self):
"""
L{_oldstyle._oldStyle} wraps an old-style class and returns a new-style
class that has the same functions, attributes, etc.
"""
self.assertEqual(type(SomeOldStyleClass), types.ClassType)
updatedClass = _oldstyle._oldStyle(SomeOldStyleClass)
self.assertEqual(type(updatedClass), type)
self.assertEqual(updatedClass().func(), "hi")
self.assertEqual(updatedClass().bar, "baz")
