def __contains__(self,ob):
if isinstance(ob,ClassTypes):
bases = self.subject._Protocol__adapters
for base in getMRO(ob,True):
if base in bases:
return bases[base][0] is not protocols.DOES_NOT_SUPPORT
return False
def __contains__(self, ob):
if isinstance(ob, ClassTypes):
bases = self.subject._Protocol__adapters
for base in getMRO(ob, True):
if base in bases:
return bases[base][0] is not protocols.DOES_NOT_SUPPORT
return False
def testClassCriteriaSeedsAndDispatchFunctions(self):
for klass in (Vehicle,LandVehicle,WaterVehicle,HumanPowered,GasPowered):
seeds = list(ISeededCriterion(klass).seeds())
self.failUnless(klass in seeds)
self.failUnless(object in seeds)
self.failIf(len(seeds)!=2)
validateCriterion(klass,
strategy.make_node_type(strategy.dispatch_by_mro),
parents=[ICriterion(cls) for cls in getMRO(klass,True)])
def testClassCriteriaSeedsAndDispatchFunctions(self):
for klass in (Vehicle, LandVehicle, WaterVehicle, HumanPowered,
GasPowered):
seeds = list(ISeededCriterion(klass).seeds())
self.failUnless(klass in seeds)
self.failUnless(object in seeds)
self.failIf(len(seeds) != 2)
validateCriterion(
klass,
strategy.make_node_type(strategy.dispatch_by_mro),
parents=[ICriterion(cls) for cls in getMRO(klass, True)])
def getInheritedRegistries(klass, registryName):
"""Minimal set of 'registryName' registries in reverse MRO order"""
bases = klass.__bases__
if len(bases) == 1:
reg = getattr(bases[0], registryName, NOT_FOUND)
if reg is not NOT_FOUND:
yield reg
else:
mro = list(getMRO(klass))
bases = [(-mro.index(b), b) for b in bases]
bases.sort()
for (b, b) in bases:
reg = getattr(b, registryName, NOT_FOUND)
if reg is not NOT_FOUND:
yield reg
def _installedDescr(self, klass):
# Return a newly installed descriptor proxy to use, or raise a usage
# error if self doesn't know its own right name.
from protocols.advice import getMRO
name = self.attrName
for cls in getMRO(klass):
if name in cls.__dict__:
if cls.__dict__[name] is self:
# Install a proxy, so we don't have to do this again!
descr = self._copyWithName(name)
setattr(cls, name, descr)
return descr
else:
break
# If we get here, we were not found under the name we were given
self.usageError()
def testSubclassCriterion(self):
s = SubclassCriterion(Vehicle)
validateCriterion(
s,
strategy.make_node_type(strategy.dispatch_by_subclass),
parents=[SubclassCriterion(c) for c in getMRO(Vehicle, True)])
# seeds()
self.assertEqual(s.seeds(), [Vehicle, None])
# __contains__
for klass in Vehicle, LandVehicle, WaterVehicle:
self.failUnless(klass in s)
for klass in None, GasPowered, object, Wheeled:
self.failUnless(klass not in s)
# implies()
self.failUnless(s.implies(SubclassCriterion(object)))
self.failUnless(SubclassCriterion(LandVehicle).implies(s))
self.failIf(s.implies(SubclassCriterion(LandVehicle)))
self.failIf(SubclassCriterion(object).implies(s))
# eq/ne/invert
self.assertEqual(s, SubclassCriterion(Vehicle))
self.assertNotEqual(s, SubclassCriterion(LandVehicle))
# matches()
table = {LandVehicle: 1, object: 2, None: 3}
items = list(s.matches(table))
self.assertEqual(items, [LandVehicle])
# dispatch
table = {Vehicle: 1, object: 2, None: 3}
self.assertEqual(strategy.dispatch_by_subclass(table, Vehicle), 1)
self.assertEqual(strategy.dispatch_by_subclass(table, LandVehicle), 1)
self.assertEqual(strategy.dispatch_by_subclass(table, object), 2)
self.assertEqual(strategy.dispatch_by_subclass(table, None), 3)
self.assertRaises(AttributeError, strategy.dispatch_by_subclass, table,
Bicycle)
def testSubclassCriterion(self):
s = SubclassCriterion(Vehicle)
validateCriterion(s,
strategy.make_node_type(strategy.dispatch_by_subclass),
parents=[SubclassCriterion(c) for c in getMRO(Vehicle,True)]
)
# seeds()
self.assertEqual( s.seeds(), [Vehicle,None])
# __contains__
for klass in Vehicle,LandVehicle,WaterVehicle:
self.failUnless(klass in s)
for klass in None,GasPowered,object,Wheeled:
self.failUnless(klass not in s)
# implies()
self.failUnless( s.implies(SubclassCriterion(object)) )
self.failUnless( SubclassCriterion(LandVehicle).implies(s) )
self.failIf( s.implies(SubclassCriterion(LandVehicle)) )
self.failIf( SubclassCriterion(object).implies(s) )
# eq/ne/invert
self.assertEqual( s, SubclassCriterion(Vehicle))
self.assertNotEqual( s, SubclassCriterion(LandVehicle))
# matches()
table = {LandVehicle:1,object:2,None:3}
items = list(s.matches(table))
self.assertEqual(items,[LandVehicle])
# dispatch
table = {Vehicle:1,object:2,None:3}
self.assertEqual(strategy.dispatch_by_subclass(table, Vehicle), 1)
self.assertEqual(strategy.dispatch_by_subclass(table, LandVehicle), 1)
self.assertEqual(strategy.dispatch_by_subclass(table, object), 2)
self.assertEqual(strategy.dispatch_by_subclass(table, None), 3)
self.assertRaises(AttributeError,
strategy.dispatch_by_subclass, table, Bicycle)
def parent_criteria(self):
for cls in getMRO(self.subject, True):
yield self.__class__(cls)
def parent_criteria(self):
for cls in getMRO(self.subject,True):
yield self.__class__(cls)
def lookupKeys(self):
return getMRO(self.subject)
