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"""Slot tests
Made for Jython.
"""
from test import test_support
import unittest
# The strict tests fail on PyPy (but work on CPython and Jython).
# They're questionable
strict = True
class SlottedTestCase(unittest.TestCase):
def test_slotted(self):
class Foo(object):
__slots__ = 'bar'
self.assert_('__dict__' not in Foo.__dict__)
foo = Foo()
self.assert_(not hasattr(foo, '__dict__'))
foo.bar = 'hello bar'
self.assertEqual(foo.bar, 'hello bar')
self.assertRaises(AttributeError, setattr, foo, 'foo', 'hello foo')
class Baz(object):
__slots__ = ['python', 'jython']
self.assert_('__dict__' not in Baz.__dict__)
baz = Baz()
self.assert_(not hasattr(baz, '__dict__'))
baz.python = 'hello python'
baz.jython = 'hello jython'
self.assertEqual(baz.python, 'hello python')
self.assertEqual(baz.jython, 'hello jython')
self.assertRaises(AttributeError, setattr, baz, 'foo', 'hello')
class SlottedWithDictTestCase(unittest.TestCase):
def test_subclass(self):
class Base(object):
pass
class Foo(Base):
__slots__ = 'bar'
self.assert_('__dict__' not in Foo.__dict__)
foo = Foo()
self.assert_(hasattr(foo, '__dict__'))
foo.bar = 'hello bar'
foo.foo = 'hello foo'
self.assertEqual(foo.bar, 'hello bar')
self.assertEqual(foo.__dict__, {'foo': 'hello foo'})
def test_subclass_mro(self):
class Base(object):
pass
class Slotted(object):
__slots__ = 'baz'
class Foo(Slotted, Base):
__slots__ = 'bar'
if strict:
self.assert_('__dict__' in Foo.__dict__)
self.assertEqual(Foo.__dict__['__dict__'].__objclass__, Foo)
foo = Foo()
self.assert_(hasattr(foo, '__dict__'))
foo.bar = 'hello bar'
foo.baz = 'hello baz'
foo.foo = 'hello foo'
self.assertEqual(foo.bar, 'hello bar')
self.assertEqual(foo.baz, 'hello baz')
self.assertEqual(foo.__dict__, {'foo': 'hello foo'})
class Bar(Slotted, Base):
pass
if strict:
self.assert_('__dict__' in Bar.__dict__)
self.assertEqual(Bar.__dict__['__dict__'].__objclass__, Bar)
bar = Bar()
self.assert_(hasattr(bar, '__dict__'))
bar.bar = 'hello bar'
bar.baz = 'hello baz'
bar.foo = 'hello foo'
self.assertEqual(bar.bar, 'hello bar')
self.assertEqual(bar.baz, 'hello baz')
self.assertEqual(bar.__dict__, {'foo': 'hello foo', 'bar': 'hello bar'})
def test_subclass_oldstyle(self):
class OldBase:
pass
class Foo(OldBase, object):
__slots__ = 'bar'
if strict:
self.assert_('__dict__' in Foo.__dict__)
self.assertEqual(Foo.__dict__['__dict__'].__objclass__, Foo)
foo = Foo()
self.assert_(hasattr(foo, '__dict__'))
foo.bar = 'hello bar'
foo.foo = 'hello foo'
self.assertEqual(foo.bar, 'hello bar')
self.assertEqual(foo.__dict__, {'foo': 'hello foo'})
class Bar(OldBase, object):
__slots__ = '__dict__'
self.assert_('__dict__' in Bar.__dict__)
self.assertEqual(Bar.__dict__['__dict__'].__objclass__, Bar)
bar = Bar()
self.assert_(hasattr(bar, '__dict__'))
bar.bar = 'hello bar'
bar.foo = 'hello foo'
self.assertEqual(bar.bar, 'hello bar')
self.assertEqual(bar.__dict__, {'foo': 'hello foo', 'bar': 'hello bar'})
def test_mixin_oldstyle(self):
class OldBase:
pass
class NewBase(object):
pass
class Baz(NewBase, OldBase):
__slots__ = 'baz'
self.assert_('__dict__' not in Baz.__dict__)
baz = Baz()
self.assert_(hasattr(baz, '__dict__'))
baz.baz = 'hello baz'
baz.bar = 'hello bar'
self.assertEqual(baz.baz, 'hello baz')
self.assertEqual(baz.bar, 'hello bar')
self.assertEqual(baz.__dict__, {'bar': 'hello bar'})
class SlottedWithWeakrefTestCase(unittest.TestCase):
def test_subclass_oldstyle(self):
class OldBase:
pass
class Foo(OldBase, object):
__slots__ = '__dict__'
self.assert_(hasattr(Foo, '__weakref__'))
def test_main():
test_support.run_unittest(SlottedTestCase,
SlottedWithDictTestCase,
SlottedWithWeakrefTestCase)
if __name__ == '__main__':
test_main()
|
