Staging
v0.8.1
v0.8.1
https://github.com/python/cpython
Tip revision: 1da43e5e916949c8e849e656d9d05fa4b9d6836c authored by Benjamin Peterson on 26 June 2009, 13:21:52 UTC
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
Tip revision: 1da43e5
test_property.py
# Test case for property
# more tests are in test_descr
import unittest
from test.support import run_unittest
class PropertyBase(Exception):
pass
class PropertyGet(PropertyBase):
pass
class PropertySet(PropertyBase):
pass
class PropertyDel(PropertyBase):
pass
class BaseClass(object):
def __init__(self):
self._spam = 5
@property
def spam(self):
"""BaseClass.getter"""
return self._spam
@spam.setter
def spam(self, value):
self._spam = value
@spam.deleter
def spam(self):
del self._spam
class SubClass(BaseClass):
@BaseClass.spam.getter
def spam(self):
"""SubClass.getter"""
raise PropertyGet(self._spam)
@spam.setter
def spam(self, value):
raise PropertySet(self._spam)
@spam.deleter
def spam(self):
raise PropertyDel(self._spam)
class PropertyDocBase(object):
_spam = 1
def _get_spam(self):
return self._spam
spam = property(_get_spam, doc="spam spam spam")
class PropertyDocSub(PropertyDocBase):
@PropertyDocBase.spam.getter
def spam(self):
"""The decorator does not use this doc string"""
return self._spam
class PropertySubNewGetter(BaseClass):
@BaseClass.spam.getter
def spam(self):
"""new docstring"""
return 5
class PropertyNewGetter(object):
@property
def spam(self):
"""original docstring"""
return 1
@spam.getter
def spam(self):
"""new docstring"""
return 8
class PropertyTests(unittest.TestCase):
def test_property_decorator_baseclass(self):
# see #1620
base = BaseClass()
self.assertEqual(base.spam, 5)
self.assertEqual(base._spam, 5)
base.spam = 10
self.assertEqual(base.spam, 10)
self.assertEqual(base._spam, 10)
delattr(base, "spam")
self.assert_(not hasattr(base, "spam"))
self.assert_(not hasattr(base, "_spam"))
base.spam = 20
self.assertEqual(base.spam, 20)
self.assertEqual(base._spam, 20)
self.assertEqual(base.__class__.spam.__doc__, "BaseClass.getter")
def test_property_decorator_subclass(self):
# see #1620
sub = SubClass()
self.assertRaises(PropertyGet, getattr, sub, "spam")
self.assertRaises(PropertySet, setattr, sub, "spam", None)
self.assertRaises(PropertyDel, delattr, sub, "spam")
self.assertEqual(sub.__class__.spam.__doc__, "SubClass.getter")
def test_property_decorator_doc(self):
base = PropertyDocBase()
sub = PropertyDocSub()
self.assertEqual(base.__class__.spam.__doc__, "spam spam spam")
self.assertEqual(sub.__class__.spam.__doc__, "spam spam spam")
def test_property_getter_doc_override(self):
newgettersub = PropertySubNewGetter()
self.assertEqual(newgettersub.spam, 5)
self.assertEqual(newgettersub.__class__.spam.__doc__, "new docstring")
newgetter = PropertyNewGetter()
self.assertEqual(newgetter.spam, 8)
self.assertEqual(newgetter.__class__.spam.__doc__, "new docstring")
# Issue 5890: subclasses of property do not preserve method __doc__ strings
class PropertySub(property):
"""This is a subclass of property"""
class PropertySubSlots(property):
"""This is a subclass of property that defines __slots__"""
__slots__ = ()
class PropertySubclassTests(unittest.TestCase):
def test_docstring_copy(self):
class Foo(object):
@PropertySub
def spam(self):
"""spam wrapped in property subclass"""
return 1
self.assertEqual(
Foo.spam.__doc__,
"spam wrapped in property subclass")
def test_slots_docstring_copy_exception(self):
try:
class Foo(object):
@PropertySubSlots
def spam(self):
"""Trying to copy this docstring will raise an exception"""
return 1
except AttributeError:
pass
else:
raise Exception("AttributeError not raised")
def test_property_setter_copies_getter_docstring(self):
class Foo(object):
def __init__(self): self._spam = 1
@PropertySub
def spam(self):
"""spam wrapped in property subclass"""
return self._spam
@spam.setter
def spam(self, value):
"""this docstring is ignored"""
self._spam = value
foo = Foo()
self.assertEqual(foo.spam, 1)
foo.spam = 2
self.assertEqual(foo.spam, 2)
self.assertEqual(
Foo.spam.__doc__,
"spam wrapped in property subclass")
class FooSub(Foo):
@Foo.spam.setter
def spam(self, value):
"""another ignored docstring"""
self._spam = 'eggs'
foosub = FooSub()
self.assertEqual(foosub.spam, 1)
foosub.spam = 7
self.assertEqual(foosub.spam, 'eggs')
self.assertEqual(
FooSub.spam.__doc__,
"spam wrapped in property subclass")
def test_property_new_getter_new_docstring(self):
class Foo(object):
@PropertySub
def spam(self):
"""a docstring"""
return 1
@spam.getter
def spam(self):
"""a new docstring"""
return 2
self.assertEqual(Foo.spam.__doc__, "a new docstring")
class FooBase(object):
@PropertySub
def spam(self):
"""a docstring"""
return 1
class Foo2(FooBase):
@FooBase.spam.getter
def spam(self):
"""a new docstring"""
return 2
self.assertEqual(Foo.spam.__doc__, "a new docstring")
def test_main():
run_unittest(PropertyTests, PropertySubclassTests)
if __name__ == '__main__':
test_main()