def test_proxyName(self):
"""
The name of a proxy class indicates which interface it proxies.
"""
proxy = proxyForInterface(IProxiedInterface)
self.assertEquals(
proxy.__name__, "(Proxy for "
"twisted.python.test.test_components.IProxiedInterface)")
def test_original(self):
"""
Proxy objects should have an C{original} attribute which refers to the
original object passed to the constructor.
"""
original = object()
proxy = proxyForInterface(IProxiedInterface)(original)
self.assertIdentical(proxy.original, original)
def test_original(self):
"""
Proxy objects should have an C{original} attribute which refers to the
original object passed to the constructor.
"""
original = object()
proxy = proxyForInterface(IProxiedInterface)(original)
self.assertIdentical(proxy.original, original)
def test_multipleMethods(self):
"""
[Regression test] The proxy should send its method calls to the correct
method, not the incorrect one.
"""
multi = MultipleMethodImplementor()
proxy = proxyForInterface(IMultipleMethods)(multi)
self.assertEquals(proxy.methodOne(), 1)
self.assertEquals(proxy.methodTwo(), 2)
class SpecializedProxy(proxyForInterface(IProxiedInterface)):
"""
A specialized proxy which can decrement the number of yays.
"""
def boo(self):
"""
Decrement the number of yays.
"""
self.original.yays -= 1
def test_proxyName(self):
"""
The name of a proxy class indicates which interface it proxies.
"""
proxy = proxyForInterface(IProxiedInterface)
self.assertEquals(
proxy.__name__,
"(Proxy for "
"twisted.python.test.test_components.IProxiedInterface)")
def test_multipleMethods(self):
"""
[Regression test] The proxy should send its method calls to the correct
method, not the incorrect one.
"""
multi = MultipleMethodImplementor()
proxy = proxyForInterface(IMultipleMethods)(multi)
self.assertEquals(proxy.methodOne(), 1)
self.assertEquals(proxy.methodTwo(), 2)
def test_proxySetAttribute(self):
"""
The attributes that proxy objects proxy should be assignable and affect
the original object.
"""
yayable = Yayable()
proxy = proxyForInterface(IProxiedInterface)(yayable)
thingy = object()
proxy.ifaceAttribute = thingy
self.assertIdentical(yayable.ifaceAttribute, thingy)
def test_proxyAttribute(self):
"""
Proxy objects should proxy declared attributes, but not other
attributes.
"""
yayable = Yayable()
yayable.ifaceAttribute = object()
proxy = proxyForInterface(IProxiedInterface)(yayable)
self.assertIdentical(proxy.ifaceAttribute, yayable.ifaceAttribute)
self.assertRaises(AttributeError, lambda: proxy.yays)
def test_proxyDeleteAttribute(self):
"""
The attributes that proxy objects proxy should be deletable and affect
the original object.
"""
yayable = Yayable()
yayable.ifaceAttribute = None
proxy = proxyForInterface(IProxiedInterface)(yayable)
del proxy.ifaceAttribute
self.assertFalse(hasattr(yayable, 'ifaceAttribute'))
def test_proxySetAttribute(self):
"""
The attributes that proxy objects proxy should be assignable and affect
the original object.
"""
yayable = Yayable()
proxy = proxyForInterface(IProxiedInterface)(yayable)
thingy = object()
proxy.ifaceAttribute = thingy
self.assertIdentical(yayable.ifaceAttribute, thingy)
def test_proxyAttribute(self):
"""
Proxy objects should proxy declared attributes, but not other
attributes.
"""
yayable = Yayable()
yayable.ifaceAttribute = object()
proxy = proxyForInterface(IProxiedInterface)(yayable)
self.assertIdentical(proxy.ifaceAttribute, yayable.ifaceAttribute)
self.assertRaises(AttributeError, lambda: proxy.yays)
def test_proxyDeleteAttribute(self):
"""
The attributes that proxy objects proxy should be deletable and affect
the original object.
"""
yayable = Yayable()
yayable.ifaceAttribute = None
proxy = proxyForInterface(IProxiedInterface)(yayable)
del proxy.ifaceAttribute
self.assertFalse(hasattr(yayable, 'ifaceAttribute'))
def test_proxyMethod(self):
"""
The class created from L{proxyForInterface} passes methods on an
interface to the object which is passed to its constructor.
"""
klass = proxyForInterface(IProxiedInterface)
yayable = Yayable()
proxy = klass(yayable)
proxy.yay()
self.assertEquals(proxy.yay(), 2)
self.assertEquals(yayable.yays, 2)
def test_proxyMethod(self):
"""
The class created from L{proxyForInterface} passes methods on an
interface to the object which is passed to its constructor.
"""
klass = proxyForInterface(IProxiedInterface)
yayable = Yayable()
proxy = klass(yayable)
proxy.yay()
self.assertEquals(proxy.yay(), 2)
self.assertEquals(yayable.yays, 2)
def test_interfaceInheritance(self):
"""
Proxies of subinterfaces generated with proxyForInterface should allow
access to attributes of both the child and the base interfaces.
"""
proxyClass = proxyForInterface(IProxiedSubInterface)
booable = Booable()
proxy = proxyClass(booable)
proxy.yay()
proxy.boo()
self.failUnless(booable.yayed)
self.failUnless(booable.booed)
def test_interfaceInheritance(self):
"""
Proxies of subinterfaces generated with proxyForInterface should allow
access to attributes of both the child and the base interfaces.
"""
proxyClass = proxyForInterface(IProxiedSubInterface)
booable = Booable()
proxy = proxyClass(booable)
proxy.yay()
proxy.boo()
self.failUnless(booable.yayed)
self.failUnless(booable.booed)
def test_attributeCustomization(self):
"""
The original attribute name can be customized via the
C{originalAttribute} argument of L{proxyForInterface}: the attribute
should change, but the methods of the original object should still be
callable, and the attributes still accessible.
"""
yayable = Yayable()
yayable.ifaceAttribute = object()
proxy = proxyForInterface(IProxiedInterface,
originalAttribute='foo')(yayable)
self.assertIdentical(proxy.foo, yayable)
# Check the behavior
self.assertEquals(proxy.yay(), 1)
self.assertIdentical(proxy.ifaceAttribute, yayable.ifaceAttribute)
thingy = object()
proxy.ifaceAttribute = thingy
self.assertIdentical(yayable.ifaceAttribute, thingy)
del proxy.ifaceAttribute
self.assertFalse(hasattr(yayable, 'ifaceAttribute'))
def test_attributeCustomization(self):
"""
The original attribute name can be customized via the
C{originalAttribute} argument of L{proxyForInterface}: the attribute
should change, but the methods of the original object should still be
callable, and the attributes still accessible.
"""
yayable = Yayable()
yayable.ifaceAttribute = object()
proxy = proxyForInterface(
IProxiedInterface, originalAttribute='foo')(yayable)
self.assertIdentical(proxy.foo, yayable)
# Check the behavior
self.assertEquals(proxy.yay(), 1)
self.assertIdentical(proxy.ifaceAttribute, yayable.ifaceAttribute)
thingy = object()
proxy.ifaceAttribute = thingy
self.assertIdentical(yayable.ifaceAttribute, thingy)
del proxy.ifaceAttribute
self.assertFalse(hasattr(yayable, 'ifaceAttribute'))
class YayableWrapper(proxyForInterface(IProxiedInterface)):
"""
def test_implements(self):
"""
The resulting proxy implements the interface that it proxies.
"""
proxy = proxyForInterface(IProxiedInterface)
self.assertTrue(IProxiedInterface.implementedBy(proxy))
def test_implements(self):
"""
The resulting proxy implements the interface that it proxies.
"""
proxy = proxyForInterface(IProxiedInterface)
self.assertTrue(IProxiedInterface.implementedBy(proxy))
